Study on HW and Cholesterol

Drinking hydrogen water decreased cholesterol, improved glucose tolerance and insulin resistance in a study (DB-RCT) of 36 patients with type 2 diabetes or prediabetes (impaired glucose tolerance). The patients drank 900 mL of hydrogen water daily for 8 weeks [R]. 

Although it may be a safe way to reduce the risk of type 2 diabetes, drinking sufficient amounts of regular water alone may be helpful enough. Low water intake is linked to an increased risk of high blood sugar [R]. 

Scientific Reports:

Supplementation of hydrogen-rich water improves lipid and glucose metabolism in patients with type 2 diabetes or impaired glucose tolerance - PubMed (nih.gov)

Low water intake and risk for new-onset hyperglycemia - PubMed (nih.gov)