“Vitamins are essential for healthy hair growth and may help in preventing hair shedding and thinning,” says Michele Green, M.D., a cosmetic dermatologist in New York. “The best vitamins for hair growth include B vitamins, vitamin D, vitamin E, zinc, biotin and iron.
Vitamins A, D, and E are fat-soluble vitamins frequently found in hair, skin, and nails supplements due to their potential benefits, particularly for hair and skin ( 42 ).
The bottom line. To date, no clinical studies show that hair vitamins and supplements promote hair growth, prevent hair loss, or improve other facets of healthy hair such as dryness, shine, and thickness.
So which supports hair growth more: collagen or biotin? Based on scientific studies, it seems that collagen has a better claim to improving the condition of your hair. However, both can actually be used together for well-rounded nutrition and countless health benefits, aside from promoting hair regrowth.
Biotin. Biotin is a B vitamin that plays a major role in promoting the growth of healthy hair.
Biotin. Biotin, also known as vitamin B7, stimulates the production of keratin to increase follicle growth. Biotin deficiencies tend to be rare, with those diagnosed with Biotinidase Deficiency being the most common.
Takeaway. Your body makes enough biotin on its own through your dietary intake each day. Therefore, you shouldn't take biotin supplements unless directed by your doctor. There are some rare health conditions that can cause some people to need biotin supplements on a regular basis.
Here's the hard truth: Little can be done to permanently change the diameter of individual hair strands. Thickening products can do wonders to temporarily plump hair strands, but when it comes down to it, fine hair is genetic and can't be changed.
Regular intake of excessive quantities of certain nutrients can cause hair loss in some cases due to a temporary condition known as Telogen Effluvium. However, the effects of too much vitamin B7 - also known as biotin toxicity - remain unconfirmed.
Only riboflavin, biotin, folate, and vitamin B12 deficiencies have been associated with hair loss.
How much B12 should I take daily for hair growth? The lowest amount recommended that should be traceable in your body is 2.4 mcg. While you are looking for a difference in your hair growth you can increase this dosage to 3 mcg and beyond.
Sources of Biotin
Foods that contain the most biotin include organ meats, eggs, fish, meat, seeds, nuts, and certain vegetables (such as sweet potatoes) [2,12].
While folic acid is essential in supporting healthy hair growth, it is not the only vitamin or supplement that benefits both the hair and skin. Rather, it's best to choose hair care supplements that include additional hair-boosting ingredients, such as B complex, vitamin B12 and biotin.
Best overall vitamin for hair growth
Biotin, also known as vitamin B7, is a water-soluble vitamin that supports healthy hair, skin and nail growth. It is especially useful in breaking down foods such as proteins and carbohydrates, boosting energy. Nature Made's Biotin supplement contains 1,000 mcg of biotin.
The answer: Sadly, there's no magic potion that will make your hair grow faster; the only way to achieve Rapunzel-like hair is through genetics. "It's a genetic roulette; but the good news is there is much we can control by the way we treat our hair," says Fusco.
The amount of biotin suggested for hair growth usually ranges between 100 - 1,000 micrograms (mcg) daily, but this number varies based on your body's reaction to biotin.
Research shows that a lack of vitamin D in your body can lead to hair loss. One role vitamin D plays is stimulating new and old hair follicles. When there isn't enough vitamin D in your system, new hair growth can be stunted.
How fast does biotin work for hair growth? Research pertaining to how quickly vitamins work in the body is limited, however, we have found that some begin to see and experience benefits approximately 30 days after you start taking biotin. It may take up to 90 days or longer for some individuals.