Food supplements, intended for the general public and written by a scientific writer, reflects the state of knowledge on the subject at the time of updating. Subsequent developments in scientific knowledge may render it wholly or partially obsolete. It is not intended to replace the recommendations and recommendations of your doctor or pharmacist.
The dietary supplements proposed to improve hair health only aim to prevent occasional hair loss, most often without proof of their effectiveness. They aim to provide nutrients that are essential for the production of healthy hair.
B VITAMINS AGAINST HAIR LOSS
Group B vitamins stimulate the production of keratin, the protein that forms hair and nails. Many dietary supplements designed to strengthen the hair contain vitamin B8, biotin, vitamin B5, or pantothenic acid.
After reviewing the scientific data, the European health authorities have estimated that food supplements containing vitamin B8 (biotin) can claim to contribute to the maintenance of healthy hair if and only if these products contain at least 7.5 micrograms of vitamin B8 (biotin) per 100 g, 100 ml or per package if the product contains only one portion.
On the other hand, dietary supplements containing vitamin B5 (pantothenic acid) can NOT claim to be essential for healthy hair, nails, or skin.
CYSTEINE AGAINST HAIR LOSS
Cysteine, or L-cysteine, a sulfur-containing amino acid found in foods, is used in dietary supplements for hair loss problems. However, no study has proven its effectiveness, except in people suffering from malnutrition.
According to European health authorities, dietary supplements containing cysteine cannot claim to promote hair and nail growth and strength or skin quality.
METHIONINE AGAINST HAIR LOSS
Another sulfur-containing amino acid, methionine, has been proposed to treat hair loss. There is no evidence that it is effective in people whose diet is not deficient in methionine.
According to European health authorities, dietary supplements containing methionine cannot claim to improve hair growth and quality, nor can they stop hair loss.
BREWER’S YEAST AGAINST HAIR LOSS
Rich in proteins, trace elements, and B vitamins, brewer’s yeast is sometimes used to treat hair loss. Although its nutritional qualities are no longer in question, no study has validated its effectiveness in relieving this problem.
According to the European health authorities, food supplements containing brewer’s yeast cannot claim to contribute to skin, hair, or nail health.
ARE THERE ANY RISKS IN USING THESE FOOD SUPPLEMENTS?
People prone to kidney stones should avoid taking cysteine supplements. Methionine supplements are not recommended for people suffering from liver problems, cancer, cardiovascular disease, or schizophrenia.
Finally, intolerance to brewer’s yeast can result in headaches and flatulence.