Can lavender be combined with other hair-loss treatments?

Lavender and Androgenetic Alopecia: How Does It Really Work?

Lavender ( Lavandula angustifolia ), known for its relaxing aroma, has also gained attention for its potential benefits in treating androgenetic alopecia, a common form of hair loss influenced by the hormone dihydrotestosterone (DHT). This type of alopecia mainly affects men, although women can also experience it, and it is linked to a genetic sensitivity to DHT—a hormone derived from testosterone that shortens the hair growth cycle.

The use of lavender in essential oils has been proposed as a natural remedy to stimulate hair growth and combat scalp inflammation. But what happens when it is combined with other products or treatments? Does it lose its effectiveness, or can it be enhanced?

What Is DHT and Why Does It Cause Hair Loss?

DHT (dihydrotestosterone) is a hormone formed when an enzyme called 5-alpha reductase converts testosterone into DHT. While this hormone plays an important role during fetal development and puberty, in adulthood it can cause unwanted effects like prostate enlargement and hair loss in genetically predisposed individuals.

In people with androgenetic alopecia, DHT binds to the scalp's hair follicles, shortening their growth cycle and causing each new hair to be thinner than the last, until hair stops growing altogether. The most common treatments aim to reduce DHT production or block its action on the follicles.

What Does Science Say About Lavender and Hair Loss?

Scientific research exploring the relationship between lavender and hair loss is still in its early stages, but the available findings are worth considering. One of the most frequently cited studies is a 2016 experiment by Lee and colleagues, published in Toxicological Research. This study used C57BL/6 mice as a model to investigate whether the application of lavender essential oil could promote hair growth.

Over a period of four weeks, the researchers applied diluted lavender essential oil—mixed with jojoba oil—five days a week to the shaved skin of the mice. By the end of the experiment, the lavender groups had more hair follicles than a group given saline. This growth was also confirmed through histological analysis, meaning the tissues were examined under a microscope to verify follicle regeneration.

These findings suggest that lavender oil may help stimulate hair growth in mice. The study did not test why; suggested explanations, such as anti-inflammatory effects or better blood flow, are untested. However, it’s important to note that these results come from an animal study. Mice have different hair growth cycles than humans, and their responses do not always accurately reflect what might happen in people. Additionally, the study did not examine lavender's effects on DHT levels, which is the main hormonal cause of androgenetic alopecia.

Therefore, the evidence is early and limited, and it and cannot be used to claim that lavender alone can treat androgenetic alopecia in humans. So far, there are no large-scale clinical studies analyzing the effect of lavender oil in people with this type of hair loss, nor that compare its efficacy to approved medications like minoxidil or finasteride.

Lavender oil can cause allergic contact dermatitis (Bingham et al., Contact Dermatitis 2019, PMID 30779160). Case reports describe breast growth in children who were regularly exposed to lavender-containing products; it went away after the products were stopped (Henley et al., NEJM 2007, PMID 17267908; Ramsey et al., JCEM 2019, PMID 31393563). Whether lavender caused these cases is disputed (Braunstein & Braunstein 2023, PMID 38187077), but keep lavender products away from children and stop use if breast tissue develops. Do not swallow essential oils.

Does Lavender Lose Its Effectiveness When Combined with Other Ingredients?

A major question is whether combining lavender with other components—natural, synthetic, or vitamin-based—affects its ability to support hair growth. To answer this, it’s helpful to understand how lavender works. It has been suggested that lavender could act by reducing inflammation or widening blood vessels, but this comes from laboratory and animal work and has not been shown on the human scalp.

No study has tested whether other ingredients change any effect of lavender.

What Happens When Combined with Synthetic Treatments Like Minoxidil or Finasteride?

Minoxidil is an FDA-approved topical treatment for pattern hair loss; it does not act on hormones. Finasteride, meanwhile, is an oral medication that blocks the 5-alpha reductase enzyme, thus reducing DHT levels.

No study has tested lavender together with minoxidil or finasteride. Finasteride lowers DHT; minoxidil does not act on hormones. Ask your prescriber or pharmacist before adding any product to a prescription treatment.

Can It Be Used with Vitamins Like Biotin or Zinc?

No study has tested lavender together with biotin or zinc. Biotin supplements can make some blood tests read falsely high or low, including thyroid tests (Li et al., JAMA 2017, PMID 28973622), so tell your doctor if you take biotin before any blood test. Do not swallow essential oils.

And What About Other Natural Remedies Like Rosemary or Saw Palmetto?

Both rosemary essential oil and saw palmetto extract (Serenoa repens) have been researched as natural alternatives to blocking DHT.

A 2015 randomized trial compared rosemary oil with 2% minoxidil in 100 people with androgenetic alopecia (Panahi et al., Skinmed 2015, PMID 25842469). After six months, hair counts had risen in both groups and did not differ significantly between them. The trial had no placebo group and was too small and short to show that rosemary oil works as well as minoxidil. Claims that rosemary blocks DHT have not been confirmed in human studies.

Saw palmetto is thought to weakly inhibit 5-alpha reductase, mainly on the basis of laboratory studies; human hair-loss trials of it are few and small, and it has not been shown to work as well as finasteride.

No study has tested these combinations with lavender.

What Does Marketing Say vs. What Does Science Say?

In the marketplace, it is common to find natural hair products that promise to stop hair loss using lavender, rosemary, biotin, and other plant-based ingredients in formats like shampoos, tonics, and serums. Labels often highlight benefits like "stimulates growth," "natural DHT blocker," or "strengthens the follicle."

However, from a scientific standpoint, many of these effects have not yet been fully validated in humans. Animal studies or preliminary tests offer clues but do not replace large-scale clinical trials. Lavender, for instance, has not been shown to block DHT directly in clinical studies. Any benefit is usually attributed to scalp conditions, such as less inflammation or better blood flow, rather than to hormonal blocking, but these effects have not been tested on the human scalp.

That’s why it’s important to differentiate between marketing claims and scientific evidence. While natural products can be useful allies, they do not replace medically approved therapies like finasteride or minoxidil, which have demonstrated effectiveness in extensive clinical studies.

User Experiences

Community feedback shows that lavender oil is frequently discussed alongside other essential oils like peppermint, rosemary, and pumpkin seed oil, and users commonly combine them without concerns about reduced efficacy. In a discussion titled “Peppermint Oil vs Lavender Oil vs Rosemary Oil vs Pumpkin Seed Oil – Which one/combination is best?”, users shared personal regimens and experiences mixing multiple oils for hair thickening or regrowth. One user mentioned using all four oils simultaneously, noting an improvement in scalp health and hair texture. They typically mixed the oils with a carrier like coconut or castor oil, applying them several times a week. There were no reports of interference between the oils; instead, users often believed that combining them created a synergistic effect.

Another user expressed a preference for combining lavender and rosemary oil because they believed the oils reduce inflammation and boost circulation. They reported that consistent use over several months was followed by visible thickening of hair strands, though they emphasized that it required patient, regular application. Some commenters raised concerns about irritation or sensitivity, especially when using undiluted essential oils, but this was resolved by proper dilution with a carrier oil.

In a separate post, a user shared a detailed 3-month progress routine that included peppermint, jojoba, and lavender oil alongside finasteride, minoxidil, stemoxydine, and microneedling. The routine yielded "stunning" results according to the user, and other commenters praised the inclusion of oils as a complementary therapy. Lavender was specifically noted for its calming scent and soothing scalp effects. Again, there were no comments suggesting that lavender lost effectiveness when used in combination with others.

Lastly, an older thread explored why more people don’t use oils in general. While some users were skeptical of oils replacing pharmaceutical treatments like finasteride or minoxidil, others vouched for lavender and its companions, citing personal success with minimal side effects. These are personal reports, not controlled evidence, and they cannot show whether lavender itself helped.

Final Considerations Before Combining Treatments

No study has tested lavender together with minoxidil, finasteride or other hair treatments. Ask your prescriber or pharmacist before adding any product to a prescription treatment, and patch-test any new product on a small area of skin first.

Moreover, it’s important to have realistic expectations: lavender does not replace approved treatments for hair loss. Some people use it for its scent and as part of a relaxing routine.

References

Lee, B. H., Lee, J. S., & Kim, Y. C. (2016). Hair growth-promoting effects of lavender oil in C57BL/6 mice. Toxicological Research, 32(2), 103–108. https://doi.org/10.5487/TR.2016.32.2.103 (PMID 27123160)

Kasper, S., Gastpar, M., Müller, W. E., Volz, H. P., Möller, H. J., Schläfke, S., & Dienel, A. (2014). Lavender oil preparation Silexan is effective in generalized anxiety disorder—a randomized, double-blind comparison to placebo and paroxetine. International Journal of Neuropsychopharmacology, 17(6), 859–869. https://doi.org/10.1017/S1461145714000017 (PMID 24456909)

Bingham, L. J., Tam, M. M., Palmer, A. M., Cahill, J. L., & Nixon, R. L. (2019). Contact allergy and allergic contact dermatitis caused by lavender: A retrospective study from an Australian clinic. Contact Dermatitis, 81(1), 37–42. https://doi.org/10.1111/cod.13247 (PMID 30779160)

Henley, D. V., Lipson, N., Korach, K. S., & Bloch, C. A. (2007). Prepubertal gynecomastia linked to lavender and tea tree oils. New England Journal of Medicine, 356(5), 479–485. https://doi.org/10.1056/NEJMoa064725 (PMID 17267908)

Ramsey, J. T., Li, Y., Arao, Y., Naidu, A., Coons, L. A., Diaz, A., & Korach, K. S. (2019). Lavender products associated with premature thelarche and prepubertal gynecomastia: Case reports and endocrine-disrupting chemical activities. Journal of Clinical Endocrinology & Metabolism, 104(11), 5393–5405. https://doi.org/10.1210/jc.2018-01880 (PMID 31393563)

Braunstein, E. W., & Braunstein, G. D. (2023). Are prepubertal gynaecomastia and premature thelarche linked to topical lavender and tea tree oil use? touchREVIEWS in Endocrinology, 19(2), 60–68. https://doi.org/10.17925/EE.2023.19.2.9 (PMID 38187077)

Li, D., Radulescu, A., Shrestha, R. T., et al. (2017). Association of biotin ingestion with performance of hormone and nonhormone assays in healthy adults. JAMA, 318(12), 1150–1160. https://doi.org/10.1001/jama.2017.13705 (PMID 28973622)