I Tried Spearmint Oil on My Edges for 90 Days
Quick answer: Spearmint oil has real properties that may support a healthier scalp environment, but the research on it regrowing edges is slim and mostly indirect. It is not a proven standalone treatment for thinning hairlines. Peppermint oil has a stronger evidence base for scalp stimulation, and pairing either with consistent scalp care tends to give better results than oil alone.
Why Women Are Reaching for Spearmint Oil in the First Place
It started, for a lot of us, with the hormone conversation. Spearmint tea picked up attention in the natural health space because a small 2010 study published in Phytotherapy Research found it may reduce free androgen levels in women with polycystic ovarian syndrome. Androgens, particularly DHT, are connected to hair thinning. So the logic went: if spearmint lowers androgens, maybe spearmint oil on the scalp grows edges back.
That leap is bigger than it sounds. Drinking spearmint tea and applying spearmint essential oil topically are two different things. The hormone study was about tea, not oil. And it involved women with a diagnosed hormonal condition, not general traction alopecia from braids or weave.
I get why the idea caught on. When your edges are thinning and your doctor shrugs, you start testing everything.
What Does Spearmint Oil Actually Do to the Scalp?
Spearmint oil (from Mentha spicata) contains carvone and limonene as its main active compounds. It has some documented antimicrobial and anti-inflammatory properties, which means it may help keep the scalp cleaner and calmer. Inflammation around the follicle is one of the things that can slow or stop hair production, so reducing it is not a small deal.
What spearmint oil does not have in strong amounts is menthol. Menthol is the compound in peppermint oil that researchers believe increases blood circulation to the scalp. Better circulation means more oxygen and nutrients reaching the follicle. A 2014 study in Toxicological Research found that peppermint oil applied topically outperformed minoxidil in hair count in mice over four weeks. That study used peppermint, not spearmint.
Spearmint has a gentler cooling effect and is less likely to cause irritation, which is worth something. But if follicle stimulation is your main goal, the two oils are not interchangeable.
So Can Spearmint Oil Grow Your Edges?
Honestly? There is no peer-reviewed clinical evidence that topical spearmint oil regrows edges or reverses traction alopecia. That does not mean it does nothing. It means the research has not caught up yet, and you deserve to know that instead of guessing.
What it may do:
- Soothe an inflamed or itchy scalp
- Help reduce microbial buildup around follicles
- Provide a gentler alternative for people sensitive to peppermint
- Support overall scalp health as part of a broader routine
What it probably cannot do on its own:
- Reverse established scarring from long-term traction alopecia
- Replace the follicle stimulation that peppermint or rosemary oil provide
- Overcome continuous tension, poor scalp hygiene, or nutritional gaps
How Does It Compare to Oils with More Evidence?
| Oil | Key Compounds | Evidence for Hair Growth | Best Use Case |
|---|---|---|---|
| Spearmint | Carvone, limonene | Indirect (anti-inflammatory) | Sensitive scalps, scalp calm |
| Peppermint | Menthol, menthone | Stronger (circulation, 2014 animal study) | Follicle stimulation |
| Rosemary | Rosmarinic acid, ursolic acid | Strongest (2023 clinical trial, comparable to minoxidil 2%) | Androgenetic thinning, DHT-related loss |
| Argan | Vitamin E, oleic acid | Conditioning and protection | Moisture retention, breakage prevention |
| Jojoba | Wax esters | Scalp balance (similar to sebum) | Dry scalp, follicle unclogging |
The 2023 rosemary study appeared in Skinmed journal and compared rosemary oil directly to 2% minoxidil over six months. That kind of direct human trial does not yet exist for spearmint oil.
What Actually Helps Thinning Edges? A Real Routine
If your edges are thinning from braids, wigs, lace glue, relaxers, or postpartum shedding, here is what a consistent routine actually looks like.
- Stop or reduce the source of tension. No product works if tight styles are still pulling on a stressed hairline every day. The American Academy of Dermatology recommends avoiding hairstyles that pull the hairline as the first step in managing traction alopecia.
- Keep the scalp clean. Buildup blocks follicles. Wash your edges at least weekly with a sulfate-free or gentle cleansing shampoo.
- Stimulate blood flow daily. Use your fingertips or a scalp massager for two to four minutes along the hairline. This alone can make a meaningful difference over time.
- Apply a targeted edge product. This is where an oil-based formula with actual circulation-boosting ingredients matters. The Follicle Enhancer from Edge Naturale uses peppermint, argan, jojoba, and coconut in a cream that absorbs without leaving a greasy film. Massage a small amount into the hairline after cleansing, two to three times a week.
- Be patient and consistent. Hair grows roughly half an inch per month under good conditions. Visible change takes time. Three months is a minimum before drawing conclusions.
Is Spearmint Oil Safe to Use on Your Scalp?
Generally yes, when diluted properly. Essential oils should never go directly on the skin at full concentration. A safe dilution is typically two to three drops of essential oil per tablespoon of carrier oil like jojoba or coconut. Patch test first, especially if your scalp is already irritated. If you experience burning, redness, or increased shedding, stop use.
Spearmint is actually one of the gentler essential oils and is less likely to cause sensitivity than peppermint. If you want to add it to your routine, it can coexist with other oils. Just do not expect it to carry the whole load.
Frequently Asked Questions
Can I mix spearmint oil and peppermint oil for my edges?
Yes, and it is a reasonable combination. Spearmint brings mild anti-inflammatory properties while peppermint contributes more active scalp stimulation through menthol. Dilute both in a carrier oil and keep the total essential oil percentage at about two percent or lower to stay safe on the scalp.
Does spearmint oil block DHT topically?
There is no solid evidence that applying spearmint oil topically lowers DHT at the scalp level. The hormone research involves oral consumption of spearmint tea, and even that evidence is limited to women with elevated androgens from conditions like PCOS. Rosemary oil has more direct research on DHT inhibition at the follicle.
How long should I try spearmint oil before deciding if it works?
Give any consistent scalp routine at least 90 days before judging results. Hair cycles are long. If you see no change after three to four months of daily use paired with reduced tension and regular cleansing, the oil is probably not doing enough on its own, and a dermatologist visit would be worth it.
My edges are completely bald in spots. Will spearmint oil help?
If the follicles in those spots are still alive, meaning the skin is smooth but not scarred or shiny, topical treatments may still have some effect. If the skin looks shiny and tight, that can indicate scarring (cicatricial alopecia), which needs a dermatologist's evaluation. No topical oil can regrow hair from a scarred follicle.
Is spearmint oil safe during pregnancy or breastfeeding?
Essential oil safety during pregnancy and nursing is not fully established by clinical research. The general guidance from most obstetric providers is to avoid concentrated essential oils on the skin during the first trimester and to check with your OB or midwife before using them at any stage. Postpartum shedding is extremely common and often resolves on its own without intervention.
What is the difference between spearmint oil and spearmint extract?
Spearmint essential oil is a concentrated volatile extract made through steam distillation of the plant. Spearmint extract can refer to either a water-based or alcohol-based extraction with a different compound profile. In hair products, the essential oil form is more common. Read the ingredient list to know what you are actually getting.
This article is for education and is not medical advice. If you are worried about hair loss, see a board-certified dermatologist. These statements have not been evaluated by the FDA. Edge Naturale products are not intended to diagnose, treat, cure, or prevent any disease.