Saskatoon Berry on Metabolism and Gut Microbiota in Healthy Subjects

Freeze dried Saskatoon berry (30 g) will be orally administrated daily for 10 weeks.

Prediabetic patients (fasting glucose 5.6-6.9 mM/L, HbA1c 5.7-6.9%, or OGTT 2 h glucose 7.8-11 mM/L) will be randomized in two groups. One group participants will take 40g of dried Saskatoon berry/day for 12 weeks. Another group will take 40g of dried Saskatoon berry/day for 12 weeks,