Onion juice good for hair, twice a week?

Drink or apply?: I was not aware of any evidence that onion juice would have any impact on hair, whether you drink it or apply to your scalp. However, I did find http://www.ncbi.nlm.nih.gov/pubmed/12126069 in which small study suggests some benefit when applied to scalp, but greater in men than women. Best to check w/your Family Doc & Dermatologist to make sure you're otherwise healthy (enough for hair growth).