NutriStack
Colchicine and Methylfolate, a caution.
Colchicine can impair intestinal absorption of multiple nutrients through its disruption of microtubule-dependent enterocyte function. While the effect on folate absorption is less well-documented than the B12 malabsorption, colchicine's general inhibition of intestinal brush border transport mechanisms may reduce folate uptake. Megaloblastic changes in chronic colchicine users may reflect combined B12 and folate deficiency.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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At a glance
- Substances
- Colchicine and Methylfolate
- Pair type
- Caution
- Evidence (highest tier)
- Emerging
- Source citations
- 1 source
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Emerging evidence
Caution
What is happening. Colchicine can impair intestinal absorption of multiple nutrients through its disruption of microtubule-dependent enterocyte function. While the effect on folate absorption is less well-documented than the B12 malabsorption, colchicine's general inhibition of intestinal brush border transport mechanisms may reduce folate uptake. Megaloblastic changes in chronic colchicine users may reflect combined B12 and folate deficiency.
Mechanism. Colchicine binds to tubulin, disrupting microtubule assembly in intestinal epithelial cells. This impairs the intracellular trafficking and membrane recycling of nutrient transporters, including the proton-coupled folate transporter (PCFT/SLC46A1) and reduced folate carrier (RFC/SLC19A1) involved in intestinal folate absorption.
Recommendation. Monitor folate levels periodically during chronic colchicine therapy, particularly if megaloblastic changes are observed. Methylfolate supplementation (400-800 mcg/day) may be considered for long-term colchicine users. Methylfolate is preferred over folic acid as it is directly bioactive and less dependent on intestinal processing.
Stack Score
How this pair moves the number.
Effect on the composite score
If both Colchicine and Methylfolate are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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