10–30 mg/day; it is better absorbed from tomato cooked with oil.
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Lycopene is the carotenoid responsible for the intense red color of ripe tomatoes, watermelon, pink grapefruit, and guava, present in especially high concentrations in heat-processed tomato products (sauce, fried tomato, ketchup, paste) because heat processing breaks down plant cell walls and dramatically increases the carotenoid's bioavailability; the traditional Mediterranean diet, rich in sofrito and tomato sauces cooked with olive oil, is probably the best known natural strategy for accumulating lycopene in the tissues where it has clinically relevant effects.
Unlike other carotenoids such as beta-carotene (which is partially converted to vitamin A in the body), lycopene has no provitamin A activity, but it has the most potent antioxidant capacity measured among all the carotenoids studied, especially against singlet oxygen, a property that translates into clinical effects on tissues with a high oxidative stress load such as the prostate, the arteries, and UV-exposed skin.
The most studied association of lycopene is with prostate cancer: several epidemiological meta-analyses have shown that regular lycopene intake (typically 5-10 mg/day from the diet) is associated with a 10-20 percent reduction in prostate cancer risk, especially for aggressive forms, in large cohort studies; supplementation with isolated lycopene has more heterogeneous results than dietary tomato consumption, suggesting that the whole food matrix may be important.
In people with already diagnosed prostate cancer, several small trials have shown reductions in PSA and improvements in pathological markers with supplementation at 15-30 mg/day for weeks; in benign prostatic hyperplasia, the data are weaker but point to modest improvements in urinary symptoms with prolonged use.
On lipid profile and endothelial function, several studies have shown modest reductions in LDL cholesterol and improvements in functional markers of the endothelium with 10-30 mg/day of lycopene for 8-12 weeks; the mechanism combines the antioxidant effect on LDL oxidation (a key step in atherosclerosis) with direct effects on endothelial function and possibly on blood pressure in mild hypertensives.
As a fat-soluble antioxidant that accumulates in the skin, lycopene offers some protection “from within” against sun damage: several trials have shown reductions in the erythematous response to UV (sunburn) with supplementation at 10-15 mg/day for 10-12 weeks, although the effect is modest and does not replace conventional topical sunscreen.
The most efficient form is regular consumption of tomato products cooked with fat: tomato sauce, homemade fried tomato, and Mediterranean sofrito (15-25 mg of lycopene per cup of sauce) provide doses with good bioavailability and the advantage of the whole food matrix rich in other polyphenols; isolated lycopene supplements (10-30 mg/day in softgel capsules with vegetable oil) are a reasonable alternative when processed tomato is not accessible.
It is one of the supplements with the best safety profile: virtually no adverse effects at the doses studied, occasional orange-red skin discoloration with very high sustained doses (carotenodermia, reversible on discontinuation), and no relevant documented drug interactions; people taking anticoagulants may have a mild theoretical antiplatelet effect at high doses, and consumption should be moderated in people with calcium oxalate kidney stones because concentrated tomato contains oxalates.
Information, not medical advice. Scientific evidence reflects the quality of the studies.