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 I read in a book that Llysine 500mg is needed to make ferritin, an ironstoring protein that maximizes hair growth. I bought Llysine at a GNC store but it does not say anything about hair growth. Is this good for maximizing hair growth? What will help with hair growth.


If L-lysine has a role in the production of ferritin I am unaware of it, however a limited amount of clinical data does suggest that L-lysine does enhance the absorption of both iron and zinc.  One European company is citing a study that showed L-lysine was able to reduce several types of hair loss in both men and women and even applied for a patent on a product containing L-lysine for hair loss.  Clinically, I have never seen the outcome of taking L-lysine for hair loss.  If the mechanism for improving hair growth is related to the iron status of the individuals in the study I would first make sure that you check your blood levels of iron and ferritin through your doctor.  If your levels are adequate it is unlikely that a supplement that enhances iron absorption will benefit your hair growth given your levels are already normal. 

 There is a possibility the improvement was related to enhanced absorption of zinc.  Zinc is a very important nutrient for testosterone metabolism and because many forms of hair loss in men and women are related to testosterone the increased blood levels of zinc may have been what was responsible for improved hair growth. 

The good thing about L-lysine is that it does not have any known toxicity when taken in the amounts purported to aid hair growth (500mg-2000mg/day).  So if you try it and it does not work you have not jeopardized your health in any way, just your wallet. 

I might suggest adding biotin to your supplemental regimen for hair growth.  This B-vitamin has been fairly well documented to aid in hair and nail health.  It is probably the number one vitamin I would think to recommend for someone suffering from thinning hair or brittle nails. 

Make sure not to overlook the possible underlying reasons why your hair might be thinning.  Female hormone imbalances, low thyroid function and iron deficiency are some main causes of thinning hair and all of these should be investigated by you and your doctor to best identify what type of support is most indicated for you. 

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Lead Medical Director

As a certified and fully trained Naturopathic Doctor, Passero has trained and preceptored with some of the nation's leading doctors in the field of natural medicine, working under the guidance of MD’s, Chiropractors, Naturopaths and Acupuncturists. Furthermore, he is currently the Vice President of the Maryland Association of Naturopathic Physicians.

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