Is lactate bad for people with diabetes?

No. Lactate is a normal metabolite that the body can use for energy or as a building block for glucose production. Temporary increases during exercise are expected. Persistently elevated resting lactate is different and can occur alongside metabolic dysfunction or certain medical conditions.

Does lactate raise blood sugar?

Lactate can provide carbon for the liver to produce glucose through gluconeogenesis. During exercise, however, blood glucose is determined by several processes at once, including muscle glucose uptake, liver glucose production, insulin levels, exercise intensity, and counterregulatory hormones.

Does high-intensity exercise produce more lactate?

Generally, yes. As exercise intensity rises, glycolytic activity increases and blood lactate typically rises. Research in adults with type 1 diabetes has found greater lactate increases during high-intensity and resistance exercise than during moderate-intensity exercise.((Paldus B, Morrison D, Zaharieva DP, et al. A Randomized Crossover Trial Comparing Glucose Control During Moderate-Intensity, High-Intensity, and Resistance Exercise With Hybrid Closed-Loop Insulin Delivery While Profiling Potential Additional Signals in Adults With Type 1 Diabetes . Diabetes Care. 2022;45(1):194–203. doi:10.2337/dc21-1593.))

Can lactate cause insulin resistance?

The relationship is still being studied. Higher lactate has been associated with insulin resistance and type 2 diabetes, and new experimental research suggests elevated lactate and lactylation may influence pathways that worsen insulin resistance.((Wei BY, Zuo XC, Feng CS, et al. Elevated lactate aggravates insulin resistance by downregulating the PI3K/AKT/GLUT2 pathway in type 2 diabetes mellitus . Life Sciences. 2026;395:124368. doi:10.1016/j.lfs.2026.124368.)) However, lactate should not currently be considered a single established cause of insulin resistance.

Should people with diabetes measure lactate?

Usually not. Blood glucose, CGM trends, time in range, and A1C provide much more actionable information for everyday diabetes management. Lactate testing is used more often in medical settings, research, and specialized exercise testing.