Protocol · Metabolic
Prediabetes & Insulin Resistance Protocol
Berberine and Chromium are the core of this stack, with 4 supporting supplements. Each row gives the amount the protocol lists and the grade our evidence database holds for that supplement in Prediabetes & Insulin Resistance.
We are re-verifying the studies cited on protocol pages; only confirmed citations are shown.
The stack
6 supplements · 3 graded
| Grade | Supplement | Amount listed | Why it’s in the stack | Evidence on file | Shop |
|---|---|---|---|---|---|
| Primary stackThe core of this protocol | |||||
| Berberine | Amount listed: 500 mg three times daily with meals | Activates AMPK; comparable to metformin for blood glucose and HbA1c reduction
| Grade B for Blood glucose912 people | ||
| Chromium | Amount listed: 500–1,000 mcg daily (chromium picolinate) | Enhances insulin receptor sensitivity and glucose transporter activity
| Grade D for Blood Flow50 people | ||
| Supporting stackListed as additions to the core | |||||
| Alpha-Lipoic Acid | Amount listed: 600–1,200 mg daily | Antioxidant that improves insulin sensitivity and reduces diabetic neuropathy | Not graded yet | ||
| Magnesium | Amount listed: 400–500 mg daily (glycinate or malate) | Cofactor for insulin signaling; deficiency impairs glucose metabolism
| Grade C for Blood glucose17 studies · 86 people | ||
| Cinnamon Extract | Amount listed: 500 mg twice daily (Ceylon cinnamon preferred) | Polyphenols enhance insulin receptor activity and GLUT4 translocation | Not graded yet | ||
| Inositol (Myo-inositol) | Amount listed: 2–4 g daily | Second messenger in insulin signaling; improves insulin sensitivity especially in PCOS | Not graded yet | ||
Shop the evidence-backed picks
The collection holds the supplements we grade A or B for its theme, in third-party tested products where the catalog has them. It opens in our Fullscript store. You can look through it without signing in; Fullscript asks for a free account to order.
Or shop one supplement
The supplement in this protocol graded A or B. Each opens third-party tested products, matched to the dose above where we can.
- Grade B
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How this protocol works
In plain language
Prediabetes means your blood sugar is higher than normal but not yet diabetic. The goal is to improve insulin sensitivity and prevent progression to type 2 diabetes. Lifestyle changes (diet, exercise) are most important, but these supplements can help.
- Berberine is the most powerful supplement for blood sugar. Studies show it's as effective as metformin, lowering fasting glucose by 20-30 mg/dL and HbA1c by 0.5-1%. It works by activating AMPK, the same pathway as exercise.
- Chromium enhances how insulin works at the cellular level. It's particularly effective for those with actual chromium deficiency, which is common with high-sugar diets.
- Alpha-lipoic acid is an antioxidant that improves insulin sensitivity and also helps prevent diabetic complications like neuropathy.
- Magnesium deficiency is extremely common in insulin resistance. Magnesium is needed for proper insulin signaling—low levels make cells more resistant.
- Cinnamon contains polyphenols that help cells respond better to insulin. Use Ceylon cinnamon to avoid coumarin toxicity from cassia.
- Myo-inositol is especially helpful for women with PCOS-related insulin resistance.
Most important: These supplements work best alongside dietary changes (reduce refined carbs, increase fiber) and regular exercise.
Expected timeline: Fasting glucose improvements in 4-8 weeks. HbA1c changes over 3 months.