While niacinamide (vitamin B3) is known to have several benefits for the skin, such as reducing inflammation and improving skin texture, there is limited evidence to suggest that it can help with hair loss. Niacinamide may have some indirect benefits for hair health, such as improving blood flow to the scalp and supporting healthy skin on the scalp, but it is not considered a primary treatment for hair loss.
That being said, some studies suggest that other forms of vitamin B, such as biotin and pantothenic acid, may have some benefits for hair health. Biotin, for example, is often included in hair growth supplements and is thought to help strengthen hair and promote growth. However, it's important to note that more research is needed to fully understand the effects of vitamin B on hair health.
If you are experiencing hair loss or are concerned about the health of your hair, it's best to consult with a dermatologist or healthcare professional. They can help identify any underlying causes of hair loss and recommend appropriate treatment options.