Blood Sugar Supplements With Berberine: What Is Known and What Is Not

• Chromium

  3.5% of the low study dose
  1 dropper7 mcg

  200-1,000 mcg a day in glucose studies200-1,000 mcg

  Printed on the label: 7 mcg per mL. (NIH ODS, Chromium)

• Gymnema

  1.0% of the low study dose, at the ceiling
  1 dropper, even split0.74 mg

  1 dropper, most the label order allows (place 8)1.9 mg

  200-400 mg a day of extract200-400 mg

  Not printed: #8 in a 15.47 mg blend of 21. (Drugs.com, Gymnema monograph)

• African mango

  2.6% of the low study dose, at the ceiling
  1 dropper, even split0.74 mg

  1 dropper, most the label order allows (place 2)7.7 mg

  300 mg a day (150 mg twice)300 mg

  Not printed: #2 in a 15.47 mg blend of 21. (NIH ODS, Dietary Supplements for Weight Loss)

• Panax ginseng

  1.3% of the low study dose, at the ceiling
  1 dropper, even split0.74 mg

  1 dropper, most the label order allows (place 12)1.3 mg

  From about 100 mg a day (up to 20 g)100 mg

  Not printed: #12 in a 15.47 mg blend of 21. (Shishtar et al., PLoS One 2014)

• Green tea

  1.6% of the low study dose, at the ceiling
  1 dropper, even split0.74 mg

  1 dropper, most the label order allows (place 7)2.2 mg

  141-1,207 mg catechins a day141-1,207 mg

  Not printed: #7 in a 15.47 mg blend of 21. (NIH ODS, Dietary Supplements for Weight Loss)

Red bars: what one daily dropper can hold. Only chromium has a printed amount; for blend ingredients the chart shows an even split (15.47 mg / 21, about 0.74 mg per mL) and the most the label order allows. Blue bars: the low end of daily amounts of that ingredient alone in studies, set to full width. Even the ceilings are slivers of the studied doses.