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Omega-3 supplements can cause headaches in some people, though the complaint is usually mild and many headaches come from another trigger.

Olive oil can make hair feel softer and cut breakage, but human research does not show that it reliably starts new growth.

A spoonful of olive oil may trigger a bowel movement in some people, but it is not a sure fix for constipation.

Nitric oxide can improve blood flow tied to erections, but it is not a proven stand-alone fix for erectile dysfunction.

Nitric oxide can affect blood pressure and heart rhythm in some cases, yet normal body production is usually protective for the heart.

No. Nitric oxide usually relaxes blood vessels and tends to lower blood pressure, though some “nitric oxide” products can still create risks.

Yes, better blood-vessel signaling may improve erections, but erectile dysfunction still needs a proper medical workup.

Nits and head lice do not usually cause direct hair loss, but scratching, scalp irritation, and rough treatment can trigger extra shedding.

Yes, this shampoo may aid scalp issues tied to shedding, but proof for new regrowth is still limited.

Nizoral shampoo may help some scalp shedding and may modestly aid pattern thinning, but it works best as an add-on, not a solo fix.