Last verified: 17 days ago
Beta Carotene
Also known as: β-carotene, provitamin A, carotenoid, E160a
Evidence under review. — Not yet rated
Plant pigment and vitamin A precursor. Raises blood carotenoid levels, but high-dose supplements may raise cancer risk in smokers.
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What it does
Beta carotene is an orange-red pigment found in plants that your body converts into vitamin A. Getting it through food or multivitamins is associated with higher blood antioxidant levels and may...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
No established dose from provided studies
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Found in
Thorne Basic Nutrients 2/Day, Baby & Me 2 by MegaFood, Dose & Co Pure Collagen Peptides Peach and 1 more
What the Science Says
Beta carotene is an orange-red pigment found in plants that your body converts into vitamin A. Getting it through food or multivitamins is associated with higher blood antioxidant levels and may help reduce inflammation linked to conditions like rheumatoid arthritis. Some research also suggests it plays a role in gut and liver health through its interaction with the microbiome and metabolic pathways.
What It Doesn't Do
Won't prevent cancer — high-dose supplements actually increase lung cancer risk in smokers. Not a proven diabetes treatment. Taking it as an isolated supplement is not the same as eating beta carotene-rich vegetables. No evidence it directly improves athletic performance or builds muscle.
Evidence-Based Benefits
Daily multivitamin use raises serum beta carotene levels by nearly 47% in older adults over 2 years.
Moderate EvidenceEffective at: As part of a daily multivitamin supplement
Supporting studies (click to view on PubMed):
Higher dietary and serum beta carotene levels are linked to lower risk of rheumatoid arthritis.
Moderate EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Beta carotene supplements increase lung cancer risk in smokers — do not use if you smoke.
Moderate EvidenceEffective at: Risk observed at supplemental doses
Supporting studies (click to view on PubMed):
Beta carotene may help mediate the relationship between diet, gut microbiota, and fatty liver disease risk.
Weak EvidenceEffective at: No established dose from provided studies
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Moderate — beta carotene is fat-soluble and absorbs better when consumed with dietary fat. Buttermilk and dairy matrices significantly improve bioaccessibility in vitro. Conversion to vitamin A varies widely between individuals.
Red Flags to Watch For
- High-dose beta carotene supplements significantly increase lung cancer risk in smokers and asbestos workers — this is well-documented
- Beta carotene used as a food coloring additive (E160a) was associated with higher type 2 diabetes incidence in a large French cohort study
- Supplement form does not replicate the benefits of dietary beta carotene from whole foods
- Antioxidant supplementation including beta carotene may interfere with chemotherapy and radiotherapy effectiveness
Products Containing Beta Carotene
See how Beta Carotene is used in these analyzed products:
Frequently Asked Questions
What does Beta Carotene do?
Plant pigment and vitamin A precursor. Raises blood carotenoid levels, but high-dose supplements may raise cancer risk in smokers.
What is the effective dose of Beta Carotene?
No established dose from provided studies
Is Beta Carotene safe?
High-dose beta carotene supplements significantly increase lung cancer risk in smokers and asbestos workers — this is well-documented
What doesn't Beta Carotene do?
Won't prevent cancer — high-dose supplements actually increase lung cancer risk in smokers.
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25