How much should you actually take?
The clinical effective range, RDA, and safe upper limit for any supplement — from published research, not the label. Check whether your dose does anything.
Ranges are for healthy adults, from clinical literature. Not medical advice — talk to your doctor about your situation.
Is the bottle in your hand underdosed?
BioStacks checks the actual doses on any label against the research — scan it and see the efficacy score.
Common questions.
How do I know if my supplement dose is too low?
If your dose is below the clinical effective range shown above, it's likely too low to do much — many products are dosed to look good on a label, not to match the research. Enter your dose to see where it falls.
Is more always better with supplements?
No. Above the effective range you rarely get extra benefit, and above the tolerable upper limit some nutrients (like vitamin A, zinc, or iron) can cause harm. More is not better past a point.
What's the difference between the RDA and the effective dose?
The RDA is the amount that prevents deficiency in most people. The clinical effective dose is what studies use to produce a specific benefit — often much higher than the RDA.
Is this medical advice?
No. These are general ranges for healthy adults from clinical literature. Your needs depend on your health, medications, and labs — talk to your doctor about your situation.