NutriStack
Chromium and Sitagliptin, a caution.
Sitagliptin is a DPP-4 inhibitor that lowers blood glucose by prolonging endogenous GLP-1 activity. Chromium improves insulin sensitivity. The combination is usually well tolerated when sitagliptin is the only diabetes drug, but additive glucose-lowering becomes clinically meaningful when chromium is added on top of insulin or a sulfonylurea.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
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
- Chromium and Sitagliptin
- Pair type
- Caution
- Evidence (highest tier)
- Emerging
- 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 · Emerging evidence
Caution
What is happening. Sitagliptin is a DPP-4 inhibitor that lowers blood glucose by prolonging endogenous GLP-1 activity. Chromium improves insulin sensitivity. The combination is usually well tolerated when sitagliptin is the only diabetes drug, but additive glucose-lowering becomes clinically meaningful when chromium is added on top of insulin or a sulfonylurea.
Mechanism. Sitagliptin inhibits dipeptidyl peptidase-4, preserving active GLP-1 and GIP and thereby increasing glucose-dependent insulin secretion. Chromium enhances post-receptor insulin signaling. The two produce additive glucose-lowering.
Recommendation. If sitagliptin is your only diabetes medication, chromium can be added with home glucose monitoring for the first 2-4 weeks. If you also take insulin or a sulfonylurea, ask your prescriber whether those agents need to be reduced first.
Sources (2)
- Singer GM, Geohas J. The effect of chromium picolinate and biotin supplementation on glycemic control in poorly controlled patients with type 2 diabetes mellitus: a placebo-controlled, double-blinded, randomized trial. Diabetes Technol Ther. 2006;8(6):636-43. PMID 17109595
- Wong CKH, Man KKC, Shi M, et al. Intensification with dipeptidyl peptidase-4 inhibitor, insulin, or thiazolidinediones and risks of all-cause mortality, cardiovascular diseases, and severe hypoglycemia in patients on metformin-sulfonylurea dual therapy. PLoS Med. 2019;16(12):e1002999. PMID 31877127
Stack Score
How this pair moves the number.
Effect on the composite score
If both Chromium and Sitagliptin 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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