Aloe vera for traction alopecia: what it can and can't do

Last updated 2026-07-09

What is traction alopecia and why do edges go first?

Traction alopecia is hair loss caused by chronic, repetitive mechanical tension on the hair follicle. Tight braids, weaves, ponytails, locs, and even very tight buns can all cause it. The hairline and edges go first because the follicles there sit in thinner, less protected skin and the tension from styles pulled back from the face is highest at those anchor points. ^[1]

The American Academy of Dermatology notes that traction alopecia is one of the most common causes of hair loss in Black women, and unlike most other forms of alopecia, it is largely preventable if caught early. ^[1] Stage is everything. In early stages, the follicle is inflamed and stressed but still alive. Hair can return if the tension is removed and the scalp environment improves. In late-stage traction alopecia, the follicle has scarred over (technically fibrosed), and no topical product including aloe vera can regrow hair through scar tissue.

This changes how you should think about aloe vera. It's not a rescue treatment for advanced cases. It's most useful as a soothing, supportive ingredient in the early window, when follicle inflammation is the main problem rather than follicle death. If you're reading this because you just noticed your edges thinning or feel scalp tenderness and itching along the hairline, that early window is exactly when intervention, including tension reduction and a calmer scalp routine, has the best shot.

For a fuller picture of what's happening medically, our detailed guide on traction alopecia covers stages, clinical signs, and when to see a dermatologist.

What does aloe vera actually contain that matters for hair loss?

Aloe vera gel (from Aloe barbadensis miller) is mostly water, around 98.5 to 99 percent by weight. The rest is where the meaningful biology sits. ^[2]

The plant contains over 75 active compounds including vitamins A, C, E, and B12, folic acid, choline, eight enzymes (including aliiase, alkaline phosphatase, amylase, and bradykinase), four plant sterols, fatty acids including cholesterol, campesterol, and beta-sisosterol, and salicylic acid. ^[2] Bradykinase in particular has documented anti-inflammatory activity, which is directly relevant to traction alopecia because follicle inflammation is the mechanism that disrupts the hair growth cycle in early-stage cases. ^[2]

Aloe also contains proteolytic enzymes that break down dead skin cells on the scalp. A congested scalp with product buildup or sebum buildup around the follicle opening is a real problem for regrowth, and the enzyme action of aloe addresses this without harsh surfactants.

The amino acid profile in aloe includes all eight essential amino acids. Hair is made of keratin, a protein built from amino acids. Topical application doesn't get those amino acids incorporated directly into the hair shaft in any precise pharmacological way, but they do support the scalp's surface environment.

Salicylic acid shows up in small concentrations and acts as a gentle exfoliant. That matters for the type of scalp dermatitis and folliculitis that sometimes rides along with traction alopecia.

None of this is exotic science. The problem is that most internet discussions of aloe for hair loss either overclaim or dismiss the ingredient entirely. Neither is honest.

What does the research say about aloe vera and hair growth?

Let's be direct about the evidence situation: there are no large randomized controlled trials studying aloe vera for traction alopecia. The evidence base is a mix of small studies, in vitro work, and one or two controlled trials on related scalp conditions. Anyone claiming clean clinical proof is overstating things.

A review in the Indian Journal of Dermatology cataloged aloe vera's bioactive constituents and found the anti-inflammatory action of compounds like bradykinase, plus the presence of plant sterols, gives it biological plausibility for improving scalp conditions tied to hair loss. ^[2] Plausibility isn't proof. It's also not nothing.

A double-blind, placebo-controlled trial found aloe vera effective in treating seborrheic dermatitis, a scalp condition that shares some of the inflammatory features relevant to traction alopecia cases complicated by scalp irritation. ^[3]

Aloe's role in wound healing is better documented. A systematic review in the journal Burns found that aloe vera sped up wound healing compared to controls across multiple studies. ^[4] Traction alopecia involves micro-trauma to the scalp skin and follicle, so this wound-healing evidence at least suggests aloe could support tissue recovery in stressed scalp areas.

Nobody has good data on exactly how much aloe, applied how often, produces measurable hair density improvement in traction alopecia specifically. The closest adjacent data sits on androgenetic alopecia and seborrheic dermatitis. What dermatologists tend to say is that aloe is low-risk enough to use while you're doing the things that actually drive recovery (removing tension, avoiding further trauma), and the anti-inflammatory and exfoliating properties give it real biological credibility as a supporting tool.

Can aloe vera regrow edges, or will it just help with scalp health?

This is the real question and it deserves a direct answer.

Aloe vera alone will not regrow edges. Full stop.

What it can do is reduce scalp inflammation, clear follicle-blocking debris, and make a more hospitable environment for follicles that are still viable but stressed. In early-stage traction alopecia, that matters. Inflamed follicles get pushed prematurely into the telogen (resting and shedding) phase. Calming that inflammation is a real mechanism by which a condition like this can stabilize and start to reverse. ^[5]

The main driver of regrowth in traction alopecia is tension removal. The AAD is clear that the most effective treatment is to discontinue the hairstyles causing the traction. ^[1] Everything else, aloe included, is secondary. Applying aloe vera to your edges while still sleeping in ultra-tight braids every night burns time in the early window.

With tension removed, adding aloe vera to your routine has a genuine supporting role. Think of it this way: removing tension clears the cause, and aloe helps the scalp environment recover. Both matter. Research on minoxidil for traction alopecia also shows better outcomes when tension reduction accompanies topical treatment, which points to the same lesson: the scalp environment and the cause have to be addressed together. ^[5]

For follicles that have completely scarred over, no topical treatment will produce regrowth. If you've been dealing with traction alopecia for years and have smooth, shiny, featureless skin where your hairline used to be with no visible follicle openings, the follicles in those areas are likely gone. See a board-certified dermatologist.

How do you use aloe vera on thinning edges correctly?

Fresh aloe gel from the plant is the gold standard. Cut a lower leaf, slice it open lengthwise, and scoop out the clear inner gel with a spoon. The yellow latex layer just under the skin (called aloin) is a laxative compound and can irritate skin in large amounts, so rinse the leaf before using and skip that yellowish layer. ^[2]

For edges specifically, here is a straightforward approach consistent with what dermatologists recommend for scalp care in general:

Clean your scalp first. Aloe works better on a clean scalp where the gel can contact the skin rather than sit on top of product buildup. A gentle sulfate-free shampoo once or twice a week before application is reasonable.

Apply fresh or pure commercial aloe gel directly to the edge area with a clean fingertip or a soft brush. Use gentle pressure, not aggressive rubbing. The goal is skin contact, not mechanical stimulation that adds more trauma.

Leave it on. Aloe gel absorbs well and doesn't need rinsing. Apply at night so it can work without being covered by edge-control products during the day. That's also why you want the aloe to be the last thing on your edges at night rather than layered under styling products.

Frequency: once daily is reasonable. There's no evidence that three times a day beats once. Consistency over weeks matters more than intensity.

If you're combining aloe with another evidence-supported ingredient like rosemary oil (which has a randomized controlled trial behind it ^[6]), apply the rosemary oil first and let it absorb before layering aloe, or combine them in a simple DIY blend. Our piece on rosemary oil for hair growth covers the clinical data on that ingredient if you want to stack the two.

Commercial aloe products are fine if the ingredient list is short and aloe is listed first or second. Skip products where aloe appears near the end of a long ingredient list after multiple silicones and fragrances. Those have very little actual aloe activity.

Fresh aloe vs. commercial aloe gel: which one actually works better?

Fresh gel from an Aloe barbadensis miller plant has the full enzyme and bioactive complement in its most active form. Commercial gels involve processing, often heat treatment, that can degrade some of the enzyme activity, particularly bradykinase. ^[2] The catch: fresh gel is only stable for about one to two days in the refrigerator before it oxidizes and loses potency.

Here's my honest take. If you have an aloe plant and can cut a leaf fresh every day or two, that's the better option. The gel is free, unprocessed, and you know exactly what's in it. If that's not realistic for your schedule, a commercial gel with a very short ingredient list (aloe barbadensis leaf juice, water, xanthan gum, preservative) is a perfectly reasonable substitute.

What to skip in commercial products: gels where the first ingredient is water rather than aloe, products with artificial fragrances (fragrance is a known scalp irritant), and products with large amounts of alcohols like denatured alcohol or SD alcohol, which cancel out any moisturizing benefit.

Format	Enzyme activity	Shelf life	Cost	Convenience
Fresh leaf gel	Highest	1-2 days refrigerated	Very low	Requires plant access
Pure commercial gel (short INCI)	Moderate	12-24 months	Low	High
Aloe-infused product (long INCI)	Low to negligible	Long	Moderate-high	High

The table above is a practical guide, not clinical data. The enzyme activity comparison reflects what's known about heat processing effects on aloe enzymes from the biochemistry literature rather than head-to-head hair studies. ^[2]

What other ingredients can you combine with aloe vera for traction alopecia?

Aloe works well as a carrier or base for other scalp-supportive ingredients. A few worth knowing:

Rosemary oil (Rosmarinus officinalis). A randomized comparative trial in Phytotherapy Research found rosemary oil matched 2 percent minoxidil for hair density improvement in androgenetic alopecia at the 6-month mark, with less scalp itching. ^[6] This is the strongest single-ingredient trial data available for a botanical hair treatment. Two to three drops of rosemary essential oil diluted into a tablespoon of aloe gel is a simple, low-cost application. Never use undiluted essential oils directly on the scalp.

Castor oil. No clinical trial evidence for hair growth, but it's an occlusive that seals moisture into the scalp skin and may reduce mechanical friction. Use it sparingly on edges because it's heavy and can contribute to buildup if you overdo it.

Peppermint oil. A 2014 study in Toxicological Research found peppermint oil increased follicle number and follicle depth in mice over four weeks. ^[7] The human data is thin, but the mechanism (vasodilation, increased dermal papilla activity) is biologically coherent. Two drops per tablespoon of aloe gel is enough.

Biotin comes up a lot, but applied topically it has no good evidence for hair regrowth. Plenty of products market biotin heavily for edges. It's mostly noise if you don't have a deficiency.

Edge Naturale's botanical-focused product line works on this same principle of combining anti-inflammatory and scalp-supportive ingredients, if you want a pre-formulated option rather than DIY.

For more on evidence-based plant oils for scalp health, see our piece on essential oils for natural hair growth.

How long does it take to see results using aloe vera on thinning edges?

The hair growth cycle runs on a slow clock. Anagen (active growth) lasts two to six years for scalp hair, catagen (transition) lasts about two weeks, and telogen (resting and shedding) lasts two to three months. ^[8] When a follicle stressed by traction is finally allowed to recover, it usually needs to finish at least one full telogen phase before it re-enters anagen and starts producing visible new hair.

In practical terms: most people who reduce tension and add a supportive scalp routine see early signs of regrowth (fine, fuzzy new hairs along the hairline) in two to three months. Visible, meaningful density improvement takes six to twelve months. This is not specific to aloe vera. It reflects basic follicle biology. ^[8]

Aloe alone, without removing tension, will not produce regrowth on any timeline.

If you've been consistent for three to four months with tension removed and a good scalp routine and see absolutely no new hair activity (no fine hairs, no change in the hairline), that's a signal to see a dermatologist. Some traction alopecia cases involve scarring that isn't obvious from the outside, and a dermatologist can do a trichoscopy (scalp scope exam) to see whether follicles are still present.

Patience is the hardest part of this. The biology doesn't move faster because you apply more product.

First fine regrowth hairs visible (months)	3
Telogen phase completes before new anagen (months)	3
Noticeable density improvement (months)	9
Near-full regrowth in early-stage cases (months)	12

Source: Billero & Miteva, Clin Cosmet Investig Dermatol, 2018; AAD hair growth cycle data

Are there any risks or side effects of putting aloe vera on your scalp?

Aloe vera is among the better-tolerated topical ingredients for scalp use. Allergic contact dermatitis is possible but uncommon, mostly in people sensitive to plants in the Liliaceae family. ^[9] If you haven't used aloe on your skin before, a 48-hour patch test on your inner forearm before applying to the scalp is a sensible precaution.

The aloin layer (the yellow latex just under the skin of the leaf) can irritate. If you're using fresh leaf gel, slice generously past the outer leaf skin and rinse the leaf before scooping gel. Commercial pure aloe gels have typically had aloin removed through processing.

Preservatives in commercial gels, particularly methylisothiazolinone and methylchloroisothiazolinone (MI/MCI), are known contact allergens in the dermatology literature. ^[9] Read labels. If a product lists those preservatives and your scalp is already reactive, pick something preserved differently (phenoxyethanol or potassium sorbate are gentler alternatives).

Applying aloe to a scalp with open sores, active infections, or significantly broken skin can sting. That doesn't mean the product is wrong, but it's a signal to let acute irritation calm down before introducing new topicals.

For most people with traction alopecia at the hairline, aloe is a safe, gentle option with a low side-effect profile. The risk of doing nothing in the early stage (losing that window when follicles are still alive) is meaningfully higher than the risk of trying aloe.

What hairstyle changes need to happen alongside aloe vera?

This section might be the most important one in the whole article.

Aloe vera without hairstyle change is like mopping the floor while the tap is still running. The inflammation that aloe helps calm keeps coming back every time you put in a style that pulls on those edges.

The specific practices that drive traction alopecia: tight braids and weaves that pull from the hairline, sewn-in extensions with too much tension at the perimeter, tight ponytails and buns worn daily, very tight bonnets or headbands worn for long stretches, and heavy extensions in locs or faux locs that add weight-tension beyond what the follicle can handle. ^[1]

What loosening up actually means in practice: styles should not cause headache or tenderness within hours of being installed. The hair at the edges should not feel taut when you move your scalp. Braids or locs installed by a stylist should leave the hairline visibly relaxed, not pulled. If the skin at your temples is raised or rippled from the tension of the style, the tension is too high.

Protective hairstyles get recommended for traction alopecia recovery, but they have to actually be protective, meaning no tension on the hairline. A loose flat-twist with your own hair, a loose low bun, or a satin-wrapped style are protective. A tight high ponytail with a hard elastic is not.

Edge control products also need attention during recovery. Heavy, alcohol-containing edge controls applied daily with a brush and then slicked down tightly add both chemical irritation and mechanical stress. During active recovery, your edges are better off without heavy styling products. If you do use edge control, look at what's in it. See our breakdown of what makes a good edge control for the hairline.

When should you see a dermatologist instead of trying home remedies?

Dermatologist involvement is the right call in several specific situations.

If you have smooth, shiny, featureless patches along your hairline with no visible follicle openings, that's a sign of follicular scarring. A dermatologist can confirm it with trichoscopy. No home remedy including aloe reverses fibrosis.

If you've removed tension, been consistent with scalp care for three to four months, and see zero sign of new hair, get a clinical evaluation. Dermoscopy can tell you whether follicles are present. Early-stage scarring may still respond to intralesional corticosteroid injections, a treatment only a dermatologist can provide. ^[5]

If your hairline is receding fast over a few months (faster than gradual), rule out other causes. Frontal fibrosing alopecia (FFA) is a different scarring condition that can look similar to traction alopecia and is not caused by tension. It has a different treatment pathway entirely. ^[10]

If you have significant scalp pain, active pustules, or crusting along the hairline, see a dermatologist before adding any topical treatments. Active scalp infection or folliculitis needs medical management, and applying products to an infected scalp can make it worse.

The NIH's National Institute of Arthritis and Musculoskeletal and Skin Diseases publishes a solid overview of when hair loss warrants clinical evaluation. ^[10] There's no shame in escalating to professional care. Traction alopecia caught early by a dermatologist has a genuinely good prognosis. Caught late, the options narrow fast.

If you're also dealing with postpartum shedding on top of tension-related loss (a combination more common than it sounds), our piece on postpartum hair loss covers what's hormonally driven versus what's mechanical.

What's a simple daily aloe vera edge care routine for traction alopecia?

Here's a practical, product-minimal routine consistent with what the science supports. It assumes you've already removed or significantly reduced the tight styles causing tension.

Morning: Dampen edges lightly with water using a spray bottle. Apply a thin layer of pure aloe gel with a fingertip. Let it absorb for two minutes before styling. Skip heavy edge controls during the recovery period or use the gentlest option you can find.

Evening: Cleanse edges with a gentle rinse or a damp cloth to remove the day's product and sweat. Apply fresh or pure commercial aloe gel to the hairline. If you're adding rosemary oil or peppermint oil, dilute two drops into the aloe gel before applying. Protect edges with a satin scarf or satin-lined bonnet loosely tied, not pulled tight to the hairline.

Weekly: Shampoo with a gentle sulfate-free formula. After shampooing, apply aloe gel to the wet scalp at the hairline before styling. This seals in some moisture while the scalp is most receptive.

Monthly: Take a photo of your hairline in consistent lighting. Progress with hair regrowth is genuinely hard to see day to day. A monthly comparison photo over three to six months gives you real data on whether the routine is working.

Edge Naturale makes a line of products built around exactly this kind of botanical-first, low-manipulation approach for edges and thinning areas. If you want to see what formulated options look like alongside a DIY routine, the natural hair growth products section of the site is a good starting point.

The complete picture on what healthy edges hair looks like, and what warning signs to watch for, is covered in our broader edges guide.

Frequently asked questions

Can aloe vera alone regrow edges lost to traction alopecia?

No. Aloe vera can calm scalp inflammation and support the recovery environment, but it cannot regrow edges on its own. The single most effective step is removing the hairstyles causing tension. In early-stage traction alopecia, where follicles are still alive but stressed, aloe used consistently alongside tension reduction can support regrowth. It has no effect on follicles that have scarred over.

How often should I apply aloe vera to my edges?

Once daily is a reasonable target and more practical than multiple applications. Evening application tends to work best because the gel can absorb overnight without being disturbed by styling products. There's no clinical evidence that applying aloe two or three times a day produces better outcomes than once-daily consistent use. Consistency over weeks matters far more than frequency on any given day.

Is fresh aloe vera better than store-bought gel for hair growth?

Fresh gel from a leaf has the most active enzyme profile, including bradykinase, which has documented anti-inflammatory properties. Commercial processing can degrade some enzyme activity. That said, a commercial gel with a short ingredient list where aloe is first is a legitimate alternative if fresh leaf access isn't practical. Skip commercial gels where aloe is buried near the end of a long ingredient list behind silicones, fragrances, and multiple alcohols.

How long before I see regrowth from using aloe vera on thinning edges?

Realistically, early signs of regrowth, meaning fine new hairs along the hairline, appear in two to three months in favorable cases where tension has been removed. Meaningful density improvement takes six to twelve months. This reflects basic hair cycle biology, not anything specific to aloe. If you see no change after three to four months of consistent tension removal and scalp care, see a dermatologist for a trichoscopy evaluation.

Can I use aloe vera if I have scalp inflammation or dermatitis along my hairline?

Aloe has documented anti-inflammatory properties and was shown effective for seborrheic dermatitis in a controlled trial. For mild scalp irritation, it's a reasonable option. If you have active pustules, significant scaling, or severe pain along the hairline, see a dermatologist first. Applying topicals to an actively infected scalp can make the condition worse.

Is there any scientific evidence that aloe vera helps with hair loss?

Direct clinical trials on aloe for traction alopecia don't exist yet. There is evidence from adjacent areas: a controlled trial showing it treats seborrheic dermatitis, systematic review evidence on its wound-healing properties, and biochemistry research identifying anti-inflammatory compounds like bradykinase. This adds up to biological plausibility for scalp support, not a proven hair-regrowth treatment. Rosemary oil currently has stronger randomized trial evidence for hair density improvement.

What kind of aloe vera gel should I avoid putting on my edges?

Avoid gels where water is the first ingredient and aloe appears late in the list. Avoid products with denatured alcohol or SD alcohol as early ingredients, both are scalp irritants. Check for methylisothiazolinone (MI) or methylchloroisothiazolinone (MCI) preservatives if your scalp is reactive. Artificial fragrances are a common contact allergen and worth avoiding on an already-stressed hairline. Short ingredient lists are almost always better.

Can I mix aloe vera with castor oil for edges?

Yes, and it's a combination many people use. Castor oil is an occlusive that seals moisture and may reduce friction. Aloe provides anti-inflammatory and enzyme activity. Apply aloe to the scalp first, let it absorb briefly, then apply a small amount of castor oil on top. Use castor oil sparingly on edges because it's heavy and causes buildup with daily use. Buildup blocks follicle openings and works against you.

Is traction alopecia at the edges reversible?

Early-stage traction alopecia, where follicles are inflamed but still present, is reversible with tension removal and supportive scalp care. The American Academy of Dermatology states the most effective treatment is discontinuing hairstyles that cause the traction. Late-stage cases with follicular scarring are not reversible through topical treatment. Dermatologist evaluation, including trichoscopy, can tell you which stage you're dealing with.

Can traction alopecia affect areas beyond the edges?

Yes. The hairline and edges are most commonly affected because they bear the highest tension from styles pulled away from the face, but traction alopecia can appear at the crown, along a part line, or at the nape of the neck depending on the hairstyle. The underlying mechanism is the same: chronic mechanical tension on the follicle. The treatment approach, tension removal plus scalp support, applies regardless of location.

Should I stop using edge control products while trying to regrow edges?

During active recovery, reducing or eliminating heavy edge-control products is smart. Many edge controls contain hard-hold polymers, alcohols, and fragrances that can irritate a stressed scalp, and slicking down edges with a brush adds repeated mechanical stress. If you need some hold, look for lighter, alcohol-free formulas and apply with fingertip pressure rather than hard brush strokes. Full rest for the hairline during the recovery window speeds outcomes.

Can I use aloe vera overnight on my edges?

Yes, and overnight is probably the best time to use it. The gel absorbs into the scalp without competition from styling products, and the extended contact time maximizes whatever anti-inflammatory and enzyme activity the aloe provides. Protect your hair afterward with a satin scarf or satin-lined bonnet, worn loosely so it doesn't add new tension at the hairline. Satin reduces friction and moisture loss compared to cotton.

Does the aloin in fresh aloe leaf cause problems for the scalp?

Aloin is the yellow latex layer just under the leaf skin and is a known irritant for skin in more than small amounts. When using fresh leaf gel, slice past the outer skin generously and rinse the leaf before scooping. Skip the yellowish layer. The clear inner gel is what you want. Most commercial aloe gels have had aloin removed through processing, which is one reason they're an acceptable substitute if you're not confident harvesting the gel cleanly.

What else can I do alongside aloe vera to help traction alopecia?

The most impactful steps are removing or significantly loosening tension-causing styles and giving the hairline rest from heavy styling products. Alongside aloe, consider adding rosemary oil diluted in a carrier, which has the strongest botanical trial evidence for hair density. Scalp massage with gentle fingertip pressure may support circulation without adding trauma. A diet adequate in protein, iron, and zinc supports hair growth systemically. If you're also dealing with hair breakage, that's a separate but related issue.

Sources

1. American Academy of Dermatology, Traction Alopecia overview: Traction alopecia is one of the most common causes of hair loss in Black women; the most effective treatment is to discontinue the hairstyles causing the traction
2. Surjushe A, Vasani R, Saple D. Aloe vera: A short review. Indian J Dermatol. 2008;53(4):163-166. PubMed Central: Aloe vera contains over 75 active compounds including bradykinase (anti-inflammatory enzyme), plant sterols, amino acids, salicylic acid, vitamins A/C/E/B12; aloin in the latex layer can be irritating; heat processing during commercial manufacture can degrade enzyme activity
3. Vardy DA et al. A double-blind, placebo-controlled trial of an Aloe vera emulsion in the treatment of seborrheic dermatitis. J Dermatol Treat. 1999;10(1):7-11. PubMed: Aloe vera was effective in treating seborrheic dermatitis in a controlled trial, relevant because seborrheic dermatitis shares inflammatory features with scalp stress in traction alopecia
4. Maenthaisong R et al. The efficacy of aloe vera used for burn wound healing: A systematic review. Burns. 2007;33(6):713-718. PubMed: Systematic review found aloe vera accelerated wound healing compared to controls across multiple studies, supporting its plausibility for scalp micro-trauma recovery
5. Billero V, Miteva M. Traction alopecia: the root of the problem. Clin Cosmet Investig Dermatol. 2018;11:149-159. PubMed Central: Inflamed follicles are prematurely pushed into telogen phase in traction alopecia; minoxidil outcomes are better when tension reduction accompanies topical treatment; intralesional corticosteroid injections are a clinical treatment option for early-stage disease
6. Panahi Y et al. Rosemary oil vs minoxidil 2% for the treatment of androgenetic alopecia: a randomized comparative trial. Phytother Res. 2015;29(4):556-562. PubMed: Rosemary oil matched 2% minoxidil for hair density improvement in androgenetic alopecia at 6 months with less scalp itching
7. Oh JY et al. Peppermint oil promotes hair growth without toxic signs. Toxicol Res. 2014;30(4):297-304. PubMed Central: Peppermint oil increased follicle number and follicle depth in mice over four weeks, proposed mechanism is vasodilation and increased dermal papilla activity
8. American Academy of Dermatology, Hair growth cycle overview: Anagen (active growth) lasts two to six years, catagen (transition) about two weeks, telogen (resting and shedding) two to three months; stressed follicles must complete telogen before re-entering anagen
9. Miest RY, Yiannias JA et al. Contact dermatitis and preservatives. Dermatitis. American Contact Dermatitis Society / PubMed: Methylisothiazolinone (MI) and methylchloroisothiazolinone (MCI) are known contact allergens documented in dermatology literature; allergic contact dermatitis to aloe is possible but uncommon, primarily in those sensitive to Liliaceae family plants
10. NIH National Institute of Arthritis and Musculoskeletal and Skin Diseases, Hair loss overview: Frontal fibrosing alopecia is a distinct scarring condition that can resemble traction alopecia but has a different etiology and treatment pathway; NIH provides guidance on when hair loss warrants clinical evaluation