Do Omega-3s Help With Hair Growth?
One of the most exciting touted benefits of omega-3 fatty acids, abundantly found in fish oil, is that they can help you grow long, lustrous locks.
“Omega-3 fatty acids are not made in the body, so you need to eat foods that contain them or take a supplement,” says Lynne J. Goldberg, MD, the director of the hair clinic at Boston Medical Center in Massachusetts. Fish and seafood contain DHA and EPA, while plant-based foods such as walnuts and flaxseed contain alpha-linolenic acid, or ALA, a fraction of which is then converted into EPA and DHA, notes the National Institutes of Health. Proponents of omega-3s say that getting ample amounts in your diet can help feed follicles and grow hair.
In terms of supplementation, there are few studies that look at omega-3 fatty acids and hair growth, and few that study fish oil in particular.
One small study in the February 2017 issue of the Journal of Clinical and Aesthetic Dermatology looked at 10 participants with androgenetic alopecia (known as male-pattern baldness, which can appear in men and women, notes MedlinePlus) who were each given a twice-daily supplement containing a mix of fish oil, flaxseed oil, antioxidants, and melatonin. After about six months, eight people (representing 80 percent of participants) had an increase in hair. It’s important to remember, though, that this was a very small study and there was no placebo group.
An earlier study, with 120 participants, was published in 2015 in the Journal of Cosmetic Dermatology. It compared a group taking a supplement containing fish oil and vitamins C and E (among other ingredients) with a control group. After six months, 62 percent of those in the supplement group saw an increase in hair density compared with 28 percent in the control group. What’s perhaps surprising is that more than half of the women in the control group said they noticed an increase in hair growth when comparing before and after photos of their scalp. “I really think we need more data and more research to understand the potential mechanism,” says Dr. Goldberg, who was not involved with either study.
Supplements may contain fish oil or omega-3s along with other ingredients, like antioxidants. These ingredients may act synergistically together, so we shouldn’t jump to the conclusion that taking fish oil or omega-3s alone in a supplement will grow hair.
As for topical application, a study published in September 2018 in the International Journal of Molecular Sciences, in which scientists applied a fermented mackerel oil topically to rodents’ whiskers, found that the substance helped stimulate follicles, possibly by activating the “growth” phase of hair.
That’s one study — and on rodents. Overall, “topical application of fish oil will not support hair growth or scalp health,” says Kerry Yates, a trichologist and the founder of Colour Collective in Dallas. It also has a fishy smell, and the lingering odor is enough to deter some people from using pure fish oil on the scalp.
When it comes to hair growth, the most effective option is to eat a healthy diet, use gentle hair-care products, and seek treatment (start with your dermatologist) if you are losing hair, so any health conditions can be addressed, says Goldberg.