Niacinamide

New non-melanoma skin cancers and actinic keratoses are what it cut, in people who'd already had them.

Also called Nicotinamide, Vitamin B3, Niacin Amide, Nicotinic Acid Amide, 3-Pyridinecarboxamide

The item

Three squares: proven in human trials. Two: a strong signal. One: early human data. Striped: the trials disagree.

Emergency: call 911.

I am not a doctor. This is not medical advice. This is self-education. Talk to a physician who has your history before you change anything.