The two vitamins in the vitamin B complex that are particularly known for their benefits for hair – including moisturization and hair growth – are vitamin B5 (pantothenic acid) and vitamin B7 (biotin).
However, other B vitamins can also play a role in keeping your hair healthy. Learn more about what the full vitamin B complex can do for your locks below.
VITAMIN B5 BENEFITS FOR HAIR
MOISTURIZATION
Pantothenol (a provitamin of vitamin B5, pantothenic acid) is an ingredient commonly added to haircare products to combat scalp dryness and moisturize and soften your hair.3
That’s because it’s both a humectant and an emollient. These are classes of ingredients that help hydrate your hair and skin.3
Humectants can draw water up from the lower layers of your skin to hydrate the top layer, and can also use the water content in the air to moisturize skin and hair. Additionally, they can help you to shed dead hair and skin cells to make way for healthy new ones. Emollients smooth and soften skin and hair by moisturizing dry patches.3
THICKNESS
One study conducted in 2021 found that pantothenol may reduce hair shedding and increase hair thickness by preventing hair follicle cell degradation.3
However, it’s recommended that only people wanting to thicken regular hair look to products containing pantothenol – it likely won’t be effective for those with major hair loss, who should see a doctor for diagnosis and treatment.3
VITAMIN B7 BENEFITS FOR HAIR
Vitamin B7 – biotin – is an essential vitamin you need to get from your daily diet. Biotin deficiency can lead to hair loss and brittle nails, which is why it’s commonly included in skin and haircare products and supplements.4
Don’t worry too much, though, as being deficient in biotin is rare in the U.S. It’s present in many common foods like meat, eggs, beans, chickpeas and fortified cereals.4
OTHER VITAMIN B COMPLEX BENEFITS FOR HAIR
Pantothenic acid and biotin don’t deserve all the glory where our hair is concerned. Bear the rest of the vitamin B complex in mind when looking to improve your hair and scalp health, too:
Riboflavin, biotin, folate and vitamin B12 deficiencies have been associated with hair loss.1 Getting enough of these B vitamins could help reduce hair shedding and keep your locks feeling thick and healthy.
Lack of folate and vitamin B12 may play a part in premature hair graying or whitening in children and young adults. Supplementing these vitamins could help improve early graying.1
A healthy diet containing enough B vitamins may help prevent dandruff.5