Beta-Carotene and Vitamin A: Can You Take Them Together?

Use caution — significant interaction

Beta-Carotene and Vitamin A can interact. CARET gave exactly this combination (30 mg beta-carotene plus 25,000 IU retinol) and found MORE lung cancer (RR 1.28) and more deaths from any cause (RR 1.17); the trial was stopped early. Do not stack them. If vitamin A intake is the goal, dietary beta-carotene alone is the safer route because conversion is down-regulated once status is adequate.

What the evidence says

majorconflict· strong evidence

CARET gave exactly this combination (30 mg beta-carotene plus 25,000 IU retinol) and found MORE lung cancer (RR 1.28) and more deaths from any cause (RR 1.17); the trial was stopped early.

Beta-carotene is a regulated precursor of vitamin A, but preformed retinol is not regulated — taken together the retinol load is additive while the conversion safeguard applies only to the carotenoid half.

What to do: Do not stack them. If vitamin A intake is the goal, dietary beta-carotene alone is the safer route because conversion is down-regulated once status is adequate.

Beta-Carotene

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Vitamin A

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Compare Beta-Carotene vs Vitamin A Check your full stack

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Frequently asked questions

Can you take Beta-Carotene and Vitamin A together?: Beta-Carotene and Vitamin A can interact. CARET gave exactly this combination (30 mg beta-carotene plus 25,000 IU retinol) and found MORE lung cancer (RR 1.28) and more deaths from any cause (RR 1.17); the trial was stopped early. Do not stack them. If vitamin A intake is the goal, dietary beta-carotene alone is the safer route because conversion is down-regulated once status is adequate.
Do Beta-Carotene and Vitamin A interact?: CARET gave exactly this combination (30 mg beta-carotene plus 25,000 IU retinol) and found MORE lung cancer (RR 1.28) and more deaths from any cause (RR 1.17); the trial was stopped early. Beta-carotene is a regulated precursor of vitamin A, but preformed retinol is not regulated — taken together the retinol load is additive while the conversion safeguard applies only to the carotenoid half.
Should you separate Beta-Carotene and Vitamin A?: Do not stack them. If vitamin A intake is the goal, dietary beta-carotene alone is the safer route because conversion is down-regulated once status is adequate.

This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.

What the evidence says

majorconflict· strong evidence

CARET gave exactly this combination (30 mg beta-carotene plus 25,000 IU retinol) and found MORE lung cancer (RR 1.28) and more deaths from any cause (RR 1.17); the trial was stopped early.

What to do: Do not stack them. If vitamin A intake is the goal, dietary beta-carotene alone is the safer route because conversion is down-regulated once status is adequate.

Frequently asked questions

Can you take Beta-Carotene and Vitamin A together?

Do Beta-Carotene and Vitamin A interact?

CARET gave exactly this combination (30 mg beta-carotene plus 25,000 IU retinol) and found MORE lung cancer (RR 1.28) and more deaths from any cause (RR 1.17); the trial was stopped early. Beta-carotene is a regulated precursor of vitamin A, but preformed retinol is not regulated — taken together the retinol load is additive while the conversion safeguard applies only to the carotenoid half.

Should you separate Beta-Carotene and Vitamin A?

Do not stack them. If vitamin A intake is the goal, dietary beta-carotene alone is the safer route because conversion is down-regulated once status is adequate.