Lycopene supplementation reduces cholesterol and triglycerides while increasing HDL cholesterol in obese rats. After 6 weeks of daily lycopene, total cholesterol drops 29%, triglycerides 31%, LDL cholesterol 73%, and HDL cholesterol increases 33%.
See the scientific wording
In high-fat diet-induced obese rats, daily supplementation with lycopene at 30 mg/kg for 6 weeks improves the lipid profile, reducing total cholesterol by 29.1%, triglycerides by 31.2%, LDL-cholesterol by 73.1%, and increasing HDL-cholesterol by 32.7% compared to untreated obese controls.
Correlational — new studies may shift this
ObservationalOne low-scoring study links this claim to the outcome, but causation is not established.
What the research says
1 study reviewedSupporting (1)
Cohort StudyAnimal2025
The study gave obese rats lycopene for 6 weeks and found that their bad cholesterol went down by 73%, good cholesterol went up, and total fat decreased, just like the claim says.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
Quality-weighted scoring: we follow the GRADE framework — each study is rated High, Moderate, Low, or Very Low based on study design, methodology rigor, and risk of bias. A single high-quality RCT can outweigh several weaker observational studies.
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Lycopene improves blood fat levels in three main ways. First, it acts like a shield that protects cells from damage by harmful molecules called free radicals. This shield also activates the body's own natural defense system to produce more antioxidant enzymes. Second, this protection reduces inflammation, which is a type of chronic swelling that worsens blood fat problems. Third, lycopene directly changes how the liver makes and clears cholesterol. It blocks the liver from making too much cholesterol, helps remove bad cholesterol from the blood, and boosts good cholesterol by improving the enzymes that carry it. Together, these actions lower total cholesterol, triglycerides, and bad LDL cholesterol, while raising good HDL cholesterol.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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Lycopene supplementation reduces cholesterol and triglycerides while increasing HDL cholesterol in obese rats. After 6 weeks of daily lycopene, total cholesterol drops 29%, triglycerides 31%, LDL cholesterol 73%, and HDL cholesterol increases 33%.
Mechanism
1 studyLycopene improves blood fats by working through three connected processes: it protects cells from damage, reduces inflammation, and directly controls how the liver handles cholesterol. Together, these actions lower bad cholesterol and raise good cholesterol, as seen in the study with obese rats.
Lycopene improves blood fat levels in three main ways. First, it acts like a shield that protects cells from damage by harmful molecules called free radicals. This shield also activates the body's own natural defense system to produce more antioxidant enzymes. Second, this protection reduces inflammation, which is a type of chronic swelling that worsens blood fat problems. Third, lycopene directly changes how the liver makes and clears cholesterol. It blocks the liver from making too much cholesterol, helps remove bad cholesterol from the blood, and boosts good cholesterol by improving the enzymes that carry it. Together, these actions lower total cholesterol, triglycerides, and bad LDL cholesterol, while raising good HDL cholesterol.
Lycopene directly scavenges reactive oxygen species (ROS) in the body, reducing oxidative stress.
Lycopene activates the Nrf2/HO-1 signaling pathway, increasing the production and activity of antioxidant enzymes such as superoxide dismutase (SOD) and catalase (CAT).
Reduced oxidative stress inhibits the nuclear factor kappa B (NF-κB) pathway, decreasing the production of pro-inflammatory cytokines like tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6).
Lower levels of TNF-α and IL-6 reduce chronic inflammation and improve liver function, contributing to better lipid metabolism.
Lycopene inhibits the activity of HMG-CoA reductase, the rate-limiting enzyme in cholesterol synthesis, reducing de novo cholesterol production in the liver.
Lycopene upregulates LDL receptor expression on liver cells, enhancing the clearance of LDL cholesterol from the bloodstream.
Lycopene reduces acyl-CoA cholesterol acyltransferase (ACAT) activity, decreasing cholesteryl ester formation and storage in the liver and intestine.
Lycopene decreases cholesteryl ester transfer protein (CETP) activity and increases lecithin-cholesterol acyltransferase (LCAT) activity, promoting HDL maturation and reverse cholesterol transport, which raises HDL cholesterol levels.
The combined effects of reduced cholesterol synthesis, increased LDL clearance, decreased cholesterol esterification, enhanced HDL maturation, and reduced inflammation result in lower total cholesterol, triglycerides, and LDL cholesterol, and higher HDL cholesterol in the blood.
Evidence from Studies
Supporting (1)
Community contributions welcome
The study gave obese rats lycopene for 6 weeks and found that their bad cholesterol went down by 73%, good cholesterol went up, and total fat decreased, just like the claim says.
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review of Lycopene Supplementation on Lipid Profile in Rodent Models
Comprehensive search and meta-analysis of randomized controlled trials and controlled animal studies investigating lycopene supplementation in high-fat diet-induced obese rats, with outcomes including total cholesterol, triglycerides, LDL, and HDL.
Randomized Controlled Trial of Lycopene vs Placebo in High-Fat Diet-Induced Obese Rats
Randomized, placebo-controlled trial in high-fat diet-induced obese rats, with lycopene at 30 mg/kg daily for 6 weeks, measuring total cholesterol, triglycerides, LDL, HDL at baseline and endpoint.
Case-Control Study of Lycopene Levels in Obese vs Lean Rats
Comparison of plasma lycopene levels and lipid profiles in obese rats (cases) and lean rats (controls) on same diet, matched for age and sex.
Dose-Response Animal Study of Lycopene on Lipid Profile in Obese Rats
Controlled but non-randomized experiment with multiple lycopene doses (e.g., 10, 30, 60 mg/kg) in high-fat diet-induced obese rats, measuring lipid changes over 6 weeks.