TLDR Correcting nutrient deficiencies may help with hair loss, but the benefits of supplements without a deficiency are uncertain and could be harmful.
The 2017 document reviews the relationship between nutrient deficiencies and hair loss, as well as the impact of supplement use on hair growth. It finds that deficiencies in nutrients like iron, zinc, fatty acids, selenium, and vitamin D can cause hair loss, but there is limited evidence supporting supplementation in individuals without deficiencies. Over-supplementation can sometimes worsen hair loss or cause toxicity. A small study of 21 volunteers showed that vitamin E supplementation increased hair count, but high doses can be harmful. Biotin deficiency can cause hair loss, but supplementation has not been proven effective without a deficiency. Protein malnutrition and oxidative stress are also linked to hair loss, but the role of amino acids, proteins, and antioxidants needs more research. The document concludes that while correcting nutrient deficiencies is important, the efficacy of supplementation in the absence of deficiency is unclear, and physicians should counsel patients on the potential risks and lack of substantial evidence for using supplements to treat hair loss.View this study on dpcj.org →
Oxidative stress affects hair loss in men with androgenetic alopecia.
The nutritional supplement improved hair density and reduced hair loss in women with female pattern hair loss.
An extra-strength marine protein supplement helped increase hair growth and decrease hair shedding in women with thinning hair.
Low iron and vitamin D levels are linked to hair loss in women.
People with hair loss, especially those with certain types, have lower zinc levels, and zinc supplements might help.
Taking zinc supplements can help improve or cure hair loss caused by zinc deficiency.
The conclusion suggests a possible link between iron levels and hair health in women, recommending further research on iron supplementation for hair loss.
Iron deficiency common in women, not always linked to hair loss; more research needed.
Certain groups may need vitamin supplements to improve hair health and prevent other health problems.
Minoxidil and finasteride treat hair loss in men, while minoxidil treats hair loss in women.
Hairgain® significantly increased hair growth and was well-tolerated by individuals with hair loss.