Supplement decision tools
Use a calculator, checklist or selector for your next question.
Tools
Supplement cost per amount calculatorCompare serving cost and the same ingredient amount in mg, g or mcg.- Magnesium form selectorCheck health context, elemental amount, tolerance and limits of sleep claims.
- Supplement interaction checklistPrepare a medicine and supplement review; no box-count risk score.
- Protein powder cost per gram calculatorCompare actual protein grams, not scoop weight, at an equal amount.
- Creatine dose calculatorUnderstand maintenance protocols and optional study loading math in kg or lb.
- Evidence grade glossarySeparate research design, product testing, claims and evidence certainty.
3 of 3 tools
Show more toolsAbout these guides and related topics
Supplement Decision Tools
Free calculators for supplement cost and creatine study math, plus a magnesium comparison guide, interaction checklist and evidence glossary.
Direct tool access: open the creatine dose calculator to compare 3-5 g daily maintenance with weight-based loading protocols.
Choose your next question
Comparing prices? Start with cost per amount or cost per protein gram. Choosing a magnesium form? Use the selector. Combining products or medicines? Start with the interaction checklist.
How this tool works
Calculators explain their inputs, formulas and examples. The checklist and selectors help you identify the next question to investigate. None determines individual suitability, treats a condition or proves product effectiveness.
Tools
- Supplement cost per amount calculator Compare serving cost and the same ingredient amount in mg, g or mcg.
- Magnesium form selector Check health context, elemental amount, tolerance and limits of sleep claims.
- Supplement interaction checklist Prepare a medicine and supplement review; no box-count risk score.
- Protein powder cost per gram calculator Compare actual protein grams, not scoop weight, at an equal amount.
- Creatine dose calculator Understand maintenance protocols and optional study loading math in kg or lb.
- Evidence grade glossary Separate research design, product testing, claims and evidence certainty.
Editorial information
How to use the tools safely
- One tool is not a verdict. Use calculators to reveal tradeoffs, then read the supplement guide and product analysis.
- Safety beats savings. A lower cost per amount is not better if the form, dose, or interaction profile is wrong for you.
- Evidence stays separate. Quality testing supports label trust; it does not prove a health outcome.