Summary: In a small randomised crossover study using continuous glucose monitoring, adding 30 g of defatted fenugreek seed flakes to the diet for 14 days reduced 24-hour glucose excursions and variability in Asian Indian adults with type 2 diabetes.
PICO Summary
| Element | Detail |
|---|---|
| Population | 21 enrolled, 15 completed, Asian Indian adults (42–50 years) with type 2 diabetes; randomised crossover CGM study, India. |
| Intervention | Iso-caloric diet with 30 g/day defatted fenugreek seed flakes (Fenuflakes) for 14 days. |
| Comparison | Matched iso-caloric control diet without Fenuflakes (crossover). |
| Outcome | The test diet reduced 24-hour incremental area under the glucose curve (p=0.02) and mean amplitude of glycaemic excursions (p=0.006) versus control. Within the test diet, fasting glucose and HbA1c fell over 14 days (p<0.05). No major adverse effects. |
Fenuflakes and glycaemic variability
Crossover RCT · type 2 diabetes · 14 days
Over 14 days, adding 30 g/day defatted fenugreek flakes to the diet significantly lowered 24-hour glucose excursions and variability versus a matched iso-caloric control diet. A small, short, manufacturer-affiliated crossover trial, so a plausible dietary adjunct rather than proven therapy.
Expert Commentary
This is a methodologically tidy small study whose crossover design and continuous glucose monitoring give it more internal credibility than its modest size might suggest, since each participant served as their own control and the outcome was measured objectively rather than by self-report. The signal is coherent and biologically plausible: fenugreek is rich in soluble fibre and galactomannan that slow gastric emptying and carbohydrate absorption, so a reduction in both 24-hour glucose excursion and amplitude of variability fits the mechanism, and reduced glycaemic variability is itself increasingly viewed as relevant to complications beyond mean glucose. My reservations are about magnitude and durability rather than direction. Only 15 of 21 participants completed, the intervention lasted just 14 days, the within-diet HbA1c change over two weeks should be read cautiously since HbA1c reflects months of glycaemia, and the study was conducted by a group affiliated with the product’s manufacturer. Can I use this with my patients? Yes, as sensible dietary advice rather than a proven therapy. For a patient interested in food-based approaches, incorporating fenugreek is low-risk and plausibly smooths post-meal spikes, while I would frame it as an adjunct to proven glucose-lowering treatment rather than a substitute, and await longer independent trials.
References
Deshpande PO, Gokhale CA, Bhaskaran S, et al. Effect of ‘Fenuflakes’ on 24-hour glycemic variability in adults with type 2 diabetes: a randomized crossover continuous glucose monitoring study. Asia Pac J Clin Nutr. 2025;34(5):730–739. doi:10.6133/apjcn.202510_34(5).0003