Every entry whose writeup carries a note for diabetic or blood sugar condition. The note is the entry’s own — follow it for the full context. See this in the planner →
Supplements
- Alpha-Lipoic AcidGenuinely useful for diabetic neuropathy specifically — trials support around 600 mg/day, best evidenced in people with more recently-onset nerve symptoms and HbA1c under 8%. It also lowers blood sugar somewhat on its own, so combining it with insulin or oral medication needs glucose monitoring.
- BerberineIts glucose-lowering effect is real and substantial — several trials put it in the same range as metformin — which is exactly why combining it with metformin, a sulfonylurea, or insulin carries a genuine hypoglycaemia risk without medical supervision. It also inhibits several liver enzymes that affect how other medications are processed, worth flagging to whoever manages your prescriptions generally, not just your diabetes medication.
- ChromiumNIH’s own read of the evidence is that it does not reliably improve glucose control — a 24-week trial at a standard 1,000 mcg dose found no effect on insulin sensitivity or HbA1c in people with type 2 diabetes. It can still add to the blood-sugar-lowering effect of insulin or diabetes medication, so the interaction risk is real even where the benefit is not well established.
- Cinnamon ExtractThe glucose-lowering effect shows up fairly consistently in trials but is modest — roughly 10 mg/dL on fasting glucose in pooled analyses — with a weaker, less consistent effect on HbA1c than marketing around it suggests. It can still add to a diabetes medication’s effect, so it is worth mentioning to whoever manages your dose.
- MagnesiumDiabetes and magnesium deficiency reinforce each other — high blood sugar increases how much magnesium you lose in urine, and low magnesium itself worsens insulin resistance. Supplementation measurably helps fasting glucose and insulin levels in people who are deficient, with a better safety margin than most other blood-sugar supplements — mainly just GI upset at higher doses.
- VanadiumThe weakest evidence and highest caution on this list for blood sugar: a handful of tiny, short human trials hint at an effect, but a systematic review found no rigorous evidence it improves glycaemic control, and the doses that show any effect in animal studies also show kidney and reproductive toxicity signals well above the 1.8 mg/day upper intake.
Other situations