Iron Bisglycinate
The score explained
evidence, testing and value, weighed before price
Why 8.0 of 10: Provisional: excellent evidence strictly conditional on low ferritin.
- Gentle, absorbable
- Strong evidence when low
- Tested
- Only if a test shows low iron
what the evidence says
Iron is the clearest conditional story in this catalogue: in people with low ferritin, especially menstruating women, trials show supplementation reliably improves fatigue, and in people with normal iron it does nothing except add oxidative load and constipation risk. The bisglycinate form is gentler on the gut at equivalent absorption. Test first is not a slogan here; it is the evidence.
Plain-language assessment of the human evidence. No cherry-picked citations.
reviews
Most reviewers take it for energy and report it doing its job quietly. Ratings cluster around 4.6 stars across retailer sites, with few complaints beyond shipping.
Stack this with
TestingATA Medical Fatigue Blood PanelBoth target energy. ATA Medical Fatigue Blood Panel gives you a baseline for energy before you spend more on fixes.
TestingSpeedoc At-home Ferritin TestBoth target energy. Speedoc At-home Ferritin Test gives you a baseline for energy before you spend more on fixes.
FoodAMGD Dietitian-Designed Meal PlanBoth target energy. AMGD Dietitian-Designed Meal Plan handles the food side of energy without you having to think about it.