NutriStack
Beta-Carotene and Lycopene, timing-sensitive.
Taking beta-carotene and lycopene together in the same dose reduces the short-term absorption of each, because they compete for the same fat-based carrier micelles and the same transport proteins in the gut wall. Human studies that added a second carotenoid to a meal containing the first showed a measurable drop in the first carotenoid's appearance in blood-borne chylomicrons. Reassuringly, this is mainly an acute, single-meal effect: controlled trials lasting about 3 weeks found that combined intake did not meaningfully lower medium-term plasma levels of either carotenoid, so the practical impact is modest for most people.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Beta-Carotene and Lycopene
- Pair type
- Timing Sensitive
- Evidence (highest tier)
- Moderate
- Source citations
- 3 sources
- Stack Score effect
- −5 to your Stack Score (per scored timing-sensitive row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Timing Sensitive · Moderate evidence
Timing Sensitive
What is happening. Taking beta-carotene and lycopene together in the same dose reduces the short-term absorption of each, because they compete for the same fat-based carrier micelles and the same transport proteins in the gut wall. Human studies that added a second carotenoid to a meal containing the first showed a measurable drop in the first carotenoid's appearance in blood-borne chylomicrons. Reassuringly, this is mainly an acute, single-meal effect: controlled trials lasting about 3 weeks found that combined intake did not meaningfully lower medium-term plasma levels of either carotenoid, so the practical impact is modest for most people.
Mechanism. Beta-carotene and lycopene are both fat-soluble carotenoids that share the same intestinal absorption machinery. After a meal they must be solubilized into the same mixed bile-salt micelles and are then taken up across the enterocyte apical membrane by the same scavenger-receptor transporters (SR-BI, CD36, and NPC1L1) before being packaged into chylomicrons. When both are present in the same meal at supplemental doses, they compete for this limited micellar and transporter capacity, so each one acutely lowers the chylomicron (post-meal blood) response to the other.
Recommendation. No need to avoid combining these. If you specifically want to maximize absorption of each, you can separate higher-dose beta-carotene and lycopene supplements by taking them at different meals (for example one with breakfast and one with dinner), and always take each with a meal containing some dietary fat to support absorption. For general use, taking them together is fine because long-term blood levels are largely preserved.
Minimum separation. Optional: separate higher doses by 4 to 6 hours (different meals) to minimize acute competition; not required for safety
Sources (3)
- Tyssandier V, Cardinault N, Caris-Veyrat C, et al. Vegetable-borne lutein, lycopene, and beta-carotene compete for incorporation into chylomicrons, with no adverse effect on the medium-term (3-wk) plasma status of carotenoids in humans. American Journal of Clinical Nutrition, 2002.
- Reboul E. Mechanisms of Carotenoid Intestinal Absorption: Where Do We Stand? Nutrients, 2019.
- Reviews of carotenoid absorption pharmacology describing preferential incorporation of carotenes and xanthophylls into the triacylglycerol-rich (chylomicron) lipoprotein fraction after meal intake.
Stack Score
How this pair moves the number.
Effect on the composite score
If both Beta-Carotene and Lycopene are in the same stack, this pair applies −5 to your Stack Score (per scored timing-sensitive row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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