Best Supplements for Blood Sugar & Metabolic Health
Nutrient-sensing (mTOR/AMPK) and insulin sensitivity sit upstream of metabolic aging. These compounds have human evidence for glucose, lipids, or insulin markers — several are potent enough to warrant physician oversight if you take glucose-lowering medication.
Ranked by strength of human evidence (Tier A > B > C) and mechanistic fit — computed from the compound registry, not hand-picked. Every entry links to its full evidence deep-dive with PubMed citations. Educational only, not medical advice.
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Berberine HCl
Tier AAMPK Activation — Tier A.
500mg berberine HCl TID with meals (or 100–200mg dihydroberberine)·AM/PM·3 PMIDs - 2
CoQ10 (Ubiquinol)
Tier BMitochondrial Electron Transport Chain — Tier B.
100–300mg ubiquinol daily (300mg if on statins)·AM/PM·3 PMIDs - 3
Omega-3 (EPA + DHA)
Tier ASpecialized Pro-resolving Mediators (SPMs) — Tier A.
2–4g combined EPA+DHA daily (with fat-containing meals)·AM/PM·3 PMIDs - 4
R-Alpha Lipoic Acid
Tier BRedox Cycling — Tier B.
300–600mg R-ALA·AM/PM·1 PMID - 5
Magnesium (Glycinate / Threonate)
Tier BATP-Mg²⁺ Cofactor Repletion — Tier B.
200–400mg/day elemental (glycinate for tolerance; L-threonate for cognitive use)·PM·3 PMIDs - 6
GlyNAC
Tier AGlutathione Synthesis — Tier A.
600mg glycine + 600mg NAC·AM·2 PMIDs - 7
Creatine Monohydrate
Tier APhosphocreatine (PCr) / ATP Buffering — Tier A.
3–5g/day monohydrate (optional 20g/day loading, 5–7 days)·AM/PM·3 PMIDs - 8
Taurine
Tier BOsmolyte / Mitochondrial Buffer — Tier B.
1–3g taurine daily·AM/PM·1 PMID
The aging mechanisms behind this goal
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What is the best supplement for blood sugar?
Berberine has head-to-head RCT data showing glucose and HbA1c reductions comparable to metformin. It is potent — if you take diabetes medication, combining them can drop blood sugar too far, so coordinate with your prescriber.