What is lycopene? A plain guide

Lycopene is the red carotenoid pigment that gives ripe tomatoes, watermelon, pink grapefruit and guava their color. It's a fat-soluble plant compound, not a vitamin, and unlike beta-carotene the body doesn't convert it into vitamin A. Cooking and processing — tomato paste, sauce, ketchup — make it easier for the body to absorb than eating the raw fruit.

What kind of compound it is

Lycopene belongs to the carotenoid family, the same group of plant pigments that includes beta-carotene, lutein and zeaxanthin. Carotenoids are fat-soluble, meaning they dissolve in dietary fat rather than water, which is why how you eat lycopene — with or without fat — changes how much of it actually gets absorbed (see when to take lycopene). Lycopene has a straight-chain molecular structure with no ring at either end, which is the reason it doesn't convert to vitamin A the way beta-carotene, alpha-carotene and beta-cryptoxanthin do. It's an antioxidant in the sense that it can neutralize certain reactive molecules in a test tube; whether that translates into a measurable health effect at supplement doses is a separate question, covered in lycopene benefits: what the research does and doesn't show.

Where it comes from in food

Tomatoes are the dominant dietary source in most Western diets, but they're not the only one. Approximate values from USDA FoodData Central:

Approximate lycopene content by food, USDA FoodData Central

Food	Lycopene per 100 g
Tomato, raw	~3 mg
Tomato paste	~30 mg
Watermelon	~4-5 mg
Pink or red grapefruit	~1-3 mg
Guava, pink	~5-8 mg
Papaya	~1-2 mg

Strawberries aren't a meaningful source, despite the red color — that comes from anthocyanins, a different pigment family entirely, not carotenoids. Cooking concentrates lycopene by removing water, and it also converts some of it from the all-trans form to cis-isomers that the body absorbs more readily. A 1997 study gave volunteers a single dose of either fresh tomatoes or tomato paste, both containing 23 mg of lycopene alongside 15 g of corn oil, and measured how much reached the bloodstream. Tomato paste produced 2.5 to 3.8 times higher lycopene levels than the same amount from fresh tomatoes. Fat mattered in that study too — it was included in both arms because lycopene absorption depends on it.

Forms found in supplements

Two forms show up on labels: natural tomato extract (sometimes sold under a trade name like Lyc-o-Mato), which carries lycopene alongside related tomato carotenoids such as phytoene and phytofluene, and synthetic all-trans lycopene, which is lycopene alone. A 2005 trial measured protection against UV-induced skin reddening over a 12-week period, in healthy adults given roughly similar total lycopene amounts from a synthetic source, a tomato extract or a tomato-based drink — see lycopene benefits for the full write-up and its limits. Labels list lycopene content either as a flat milligram amount or as a percentage of a larger tomato extract weight, and those two things aren't the same number — see how to choose a lycopene supplement for how to tell them apart.

What research has actually looked at

A large share of human lycopene research is about men's prostate health, and most of it is either observational — comparing people's diets to their later health outcomes, which shows an association rather than a tested effect — or conducted in men already diagnosed with prostate cancer, which is a different question from whether a supplement changes someone's risk. Reporting that literature properly needs its own page, with study design and limits attached to every finding: lycopene benefits: what the research does and doesn't show.

Amount, timing and safety

Lycopene isn't classified as an essential nutrient, so there's no official recommended daily amount the way there is for a vitamin or mineral — see how much lycopene to take a day. For timing and food pairing, see when to take lycopene. For safety information, see lycopene side effects, who should not take lycopene and lycopene and medications.

Questions people ask

What does lycopene do for the body?

It acts as an antioxidant in laboratory studies, meaning it can neutralize certain reactive molecules. What that does for a person taking a supplement, at doses actually used in trials, is a narrower and more mixed picture than "antioxidant" alone suggests — see the full review linked above.

Is lycopene a vitamin?

No. It's a carotenoid, a category of plant pigment. Some carotenoids convert to vitamin A in the body; lycopene's molecular structure means it doesn't.

Does watermelon have lycopene?

Yes — watermelon is one of the richer whole-food sources, at roughly 4-5 mg per 100 g by USDA figures, in the same range as raw tomato.

Do tomatoes have lycopene?

Yes, and they're the most common dietary source in a typical US diet, especially from cooked and processed tomato products like paste, sauce and juice, which concentrate it.

Do strawberries have lycopene?

No, not in a meaningful amount. Their red color comes from anthocyanins, a different class of plant pigment.

How do you pronounce lycopene?

"LY-kuh-peen" (three syllables, stress on the first).

Does lycopene lower PSA?

That's a specific research question about an existing health condition, and it deserves the studies and their limits laid out properly rather than a one-line answer here — see lycopene benefits: what the research does and doesn't show.