NutriStack
Fenugreek and Insulin Glargine, a caution.
Fenugreek extracts lower fasting glucose and HbA1c in type 2 diabetes meta-analyses. Insulin glargine provides 24-hour basal insulin coverage. Layered together, the additive glucose-lowering can produce nocturnal hypoglycemia, especially during the first weeks after starting fenugreek or after any glargine dose change.
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
- Fenugreek and Insulin Glargine
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Moderate evidence
Caution
What is happening. Fenugreek extracts lower fasting glucose and HbA1c in type 2 diabetes meta-analyses. Insulin glargine provides 24-hour basal insulin coverage. Layered together, the additive glucose-lowering can produce nocturnal hypoglycemia, especially during the first weeks after starting fenugreek or after any glargine dose change.
Mechanism. Fenugreek's 4-hydroxyisoleucine stimulates glucose-dependent insulin release and its galactomannan fiber slows carbohydrate absorption. Insulin glargine binds insulin receptors throughout the day to drive cellular glucose uptake and suppress hepatic glucose output. Both reduce blood glucose, particularly fasting glucose.
Recommendation. Tell your prescriber before starting a fenugreek extract on insulin glargine. Check fasting and bedtime glucose more often for the first 2-4 weeks and discuss whether your glargine dose should be reduced.
Sources (2)
- Gong J, Fang K, Dong H, Wang D, Hu M, Lu F. Effect of fenugreek on hyperglycaemia and hyperlipidemia in diabetes and prediabetes: A meta-analysis. J Ethnopharmacol. 2016;194:260-268. PMID 27496582
- Kim J, Noh W, Kim A, Choi Y, Kim YS. The Effect of Fenugreek in Type 2 Diabetes and Prediabetes: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Int J Mol Sci. 2023;24(18):13999. PMID 37762302
Stack Score
How this pair moves the number.
Effect on the composite score
If both Fenugreek and Insulin Glargine 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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