Lycopene

Commonly used for
Heart HealthHealthy Aging
UV skin-damage protection
This is anecdotal, and there isn't strong clinical evidence that it works for everyone.
Lycopene is a carotenoid antioxidant. Higher dietary lycopene intake and blood levels are associated with lower prostate cancer risk in observational studies -- this is an association, not proof that supplementation prevents cancer -- and lycopene may help reduce LDL oxidation, a step relevant to atherosclerosis.
Form: Lycopene from tomato extract (softgel), standardized to 5-20% lycopene
Typical dose studied: 10-20 mg/day
Timing: With a fat-containing meal -- lycopene is fat-soluble, and cooked/processed tomato products also improve its bioavailability
Evidence for lycopene supplementation preventing cardiovascular events, cancer, or extending lifespan comes mainly from observational data, not large controlled trials with hard clinical endpoints -- worth using with realistic expectations even though the biology is genuinely promising.
~ Moderate evidence
Already taking it? No well-established clinically important drug interactions at typical dietary or supplement doses. Very high, chronic intake can cause lycopenemia (carotenodermia) -- a benign, reversible orange-tinged skin discoloration, not a safety concern.
Giovannucci E et al. (2002). A prospective study of tomato products, lycopene, and prostate cancer risk. J Natl Cancer Inst. Rao AV, Agarwal S. (1999). Role of lycopene as antioxidant carotenoid in the prevention of chronic diseases: a review. Nutrition Research. Borel P, Desmarchelier C. (2018). Bioavailability of fat-soluble vitamins and phytochemicals in humans: effects of genetic variation. Annual Review of Nutrition, 38, 69-96.