Vitamin A CAN cause hair loss.
More Info: Unlike water-soluble compounds that the body excretes when not required, vitamin A is a fat-soluble compound that the body will store until needed. Ingesting excessive amounts of vitamin A could potentially cause a toxic level to buildup producing a condition known as hypervitaminosis A. Skin and hair changes, including hair loss, are side effects of the condition. The good news is the effects of hypervitaminosis A are usually not permanent. [“Hypervitaminosis A.” A.D.A.M. Medical Encyclopedia]
Can I Get Too Much Vitamin A from My Diet?
There are two types of vitamin A acquired through food. The vitamin A found in liver, milk, cheese and eggs is called preformed vitamin A, which the body processes efficiently. Provitamin A cartonoids are found in vegetables such as sweet potatoes and carrots. [“Vitamin A.” Linus Pauling Institute at Oregon State University]
Most cases of vitamin A toxicity occur from taking supplements. Even considering all of the foods that are fortified with vitamin A, it is rare to achieve toxic levels of vitamin A in the body through diet alone. For example, a person eating liver everyday may be at risk for developing hypervitaminosis A. According to the Linus Pauling Institute, symptoms of toxicity are generally associated with chronic hypervitaminosis A in excess of ten times the upper limits of the recommended daily allowance of 25,000 to 33,000 IU/day. [“Vitamin A.” Linus Pauling Institute at Oregon State University]
Are the Effects Hypervitaminosis A Permanent?
The remedy for hypervitaminosis A is a simple solution especially if it is caused by excessive supplementation. Simply stop taking it. Most people suffering from the adverse symptoms of hypervitaminosis A will fully recover once the levels in the body return to a normal level. [“Hypervitaminosis A.” A.D.A.M. Medical Encyclopedia]
”Hypervitaminosis A.” A.D.A.M. Medical Encyclopedia. National Institute of Health, n.d. Web. 23 Apr. 2012. <www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001390/>
”Vitamin A.” Linus Pauling Institute at Oregon State University. N.p., n.d. Web. 24 Apr. 2012. <http://lpi.oregonstate.edu/infocenter/vitamins/ vitaminA/>
”Dietary Supplement Fact Sheet: Vitamin A and Carotenoids — Health Professional Fact Sheet.” Office of Dietary Supplements (ODS). N.p., n.d. Web. 23 Apr. 2012. <http://ods.od.nih.gov/factsheets/vitamina-HealthProfessional/>.