Chlorogenic acid (green coffee)

Tier 2 — promising · Glucose · Blood pressure

The main active compound in green coffee bean extract, shown to modestly lower blood sugar and blood pressure in multiple trials. Works by slowing glucose absorption in the gut and improving how your body handles sugar after meals. Contains less caffeine than roasted coffee. Generally well tolerated with mild digestive effects in some people.

Dose: 200–400 mg/day chlorogenic acid (equivalent to 400–800 mg green coffee extract)