Here’s what research actually supports:
| Supplement | Proven Benefit | Typical Dose Studied | Important Notes |
|---|---|---|---|
| Vitamin D | Improves insulin sensitivity (only if deficient) | 2,000–4,000 IU/day | Get a blood test before supplementing |
| Magnesium | Helps glycemic control; relaxes blood vessels | 300–400 mg/day | Citrate or glycinate absorb best |
| Berberine | Lowers fasting glucose similar to metformin | 500 mg 2–3x/day | May cause stomach discomfort |
| Ceylon Cinnamon | Slightly lowers post-meal glucose | 1–3 g/day | Helpful, but not magical |
| Chromium Picolinate | Mild improvement in insulin action | 200–1000 mcg/day | Only useful if deficient |
| Alpha-Lipoic Acid | Reduces neuropathy and oxidative stress | 600–1200 mg/day | Strong antioxidant effects |
These are complementary — NOT replacements for medical treatment.
