Myth-buster
Seven clinical studies on vitamin B1 for blood sugar control all came up empty — the review found no significant effect on hyperglycemic response.
Despite hints from lab research that thiamine might help with diabetes, this systematic review of seven clinical trials found no measurable benefit for blood sugar spikes, cardiovascular risk, or insulin sensitivity — meaning the popular belief that B1 supplements can tame post-meal glucose remains unsupported by decent human data.
This systematic review pulled together seven clinical studies testing whether vitamin B1 (thiamine) supplements improve blood sugar control in people with diabetes. None of the key outcomes — hyperglycemic response, cardiac function, insulin sensitivity, or heart failure — showed a statistically significant improvement. The review itself highlights that the evidence is conflicting and limited, and calls for larger, longer trials before drawing any conclusions.
Where this fits in the evidence
This is among the first studies we've indexed on Vitamin B1 for Reduced Hyperglycemic Response — treat it as an early signal until more research accumulates.
The study
- Systematic Review
- 2025-04-22
- International journal of molecular sciences
- PubMed: 40362174
- DOI: 10.3390/ijms26093932
- Full study breakdown →
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.