1. Pumpkin Seed Oil
Rich in omega-3 fatty acids and other heart-healthy fats, pumpkin seed oil can help lengthen your locks, according to a study published in 2014 in Evidence Based Complementary and Alternative Medicine. Researchers who conducted this study found that taking 400 milligrams of pumpkin seed oil daily boosts hair growth in patients with alopecia, which is a form of hair loss.
2. Tocotrienol Capsules
Tocotrienol, which is a form of vitamin E and a rich antioxidant, may also thicken your mane. A study published in 2010 in Tropical Life Sciences Research found that taking 100 milligrams of tocotrienol supplements daily boosted hair growth in volunteers suffering from hair loss.
3. Peppermint Oil
Applying peppermint oil to your scalp is a surprising way to promote speedy hair growth. A study published in 2014 in Toxicological Research found that applying peppermint oil to the skin of rats for four weeks enhanced hair growth. Try adding peppermint oil to your daily shampoo, or massage peppermint oil into your scalp right before you shampoo your hair.
4. Marine Protein Supplements
Up-and-coming remedies that show potential for hair growth, especially in women, include marine protein supplements. Such supplements are rich in protein, loaded with essential omega-3 fatty acids, and free from harmful levels of mercury and other toxins. A study published in 2015 in Dermatology Research and Practice found that marine protein supplements boost hair growth and reduce shedding in women with thinning hair.
5. Topical Melatonin
Melatonin, a natural hormone produced by your body but also available in supplement form, may also help lengthen your locks. A review published in 2012 in International Journal of Trichology found that using a melatonin solution topically appears to help delay and treat hair loss in both men and women. Another review published in 2008 in the Journal of Pineal Research confirms that melatonin affects hair growth. Look for topical beauty products containing melatonin.
Taking hair-growth–enhancing supplements is no substitute for habits that promote healthy hair, such as getting plenty of protein, vitamins, minerals, and sleep. However, adding certain supplements to your diet or applying topical remedies to your scalp may help speed up hair growth and prevent hair loss.