Supplement × Prescription·a caution·Emerging evidence
Berberine may lower glucose, while prescription niacin can worsen glycemic control; combining them can make glucose response less predictable.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
What is happening. Berberine may lower glucose, while prescription niacin can worsen glycemic control; combining them can make glucose response less predictable.
Mechanism. Opposing and variable metabolic effects can obscure the true response to lipid or diabetes therapy.
Recommendation. Monitor fasting glucose or A1c when starting or stopping either agent.
Effect on the composite score
If both Berberine and Niacin (Prescription) 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 at /methodology/stack-score.
Every claim on this page is cited. PMIDs link straight to PubMed.
Check your full routine
Drop your supplements and prescriptions into NutriStack and it runs every pair at once: every interaction, synergy, timing rule, and contraindication, each linked to its primary source.
NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.
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