(And even black seed oil.) So how do you figure out which oil ... “The reality is I don’t recommend people aiming to get a bulk of their nutrients from cooking oil, period,” Sharp says.

Black seed oil is a source of omega-3 fatty acids, Thomason notes. You should aim to get between 1.1 and 1.6 grams of omega-3s every day, according to The National Institutes of Health (NIH).

Combine black seed oil with other nourishing oils like jojoba or coconut oil. Apply the mixture to your hair from roots to ...