Supplementation of vitamin C reduces blood glucose and improves glycosylated hemoglobin in type 2 diabetes mellitus: a randomized, double-blind study.

In conclusion, oral supplementation of vitamin C with metformin reverses ascorbic acid levels, reduces FBS, PMBG, and improves HbA1c. Hence, both the drugs in combination may be used in the treatment of type 2 DM to maintain good glycemic control. PMID: 22242019 [PubMed]
Source: Advances in Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Adv Pharmacol Sci Source Type: research