15 evidence-based tools to choose, check, compare, and safely stack supplements. Built on clinical data. Completely free — no sign-up needed.
Enter up to 8 supplements and see a colour-coded safety matrix — green (safe), yellow (timing caution), red (avoid). 57 clinically documented interaction pairs, 48 supplements.
Check Interactions →Taking prescription medication? Search your drug (warfarin, metformin, levothyroxine, SSRIs, statins, and more) to see which supplements are safe, need monitoring, or must be avoided.
Check My Medication →Paste any supplement's marketing copy and get an instant snake oil score (0–100). Flags proprietary blends, unsupported claims, fake urgency, conspiracy framing, and 15 other red-flag patterns.
Analyse This Label →Answer 7 questions about your health goals, age, and lifestyle. Get matched to your top 3 supplements from our 99+ reviewed database — in under 2 minutes.
Take the Free Quiz →15 symptom questions → personalised probability scores for 6 major deficiencies (vitamin D, B12, iron, magnesium, zinc, omega-3). Shows what to test, target levels, and what to supplement.
Assess My Deficiencies →Choose your health goals → get a personalised morning/evening/bedtime schedule with doses, food requirements, and timing rules. Printable. Includes drug-interaction warnings.
Build My Stack →10 questions about your lifestyle, symptoms, and history → personal blood sugar risk score with targeted supplement and lifestyle recommendations.
Check My Risk →200+ ingredients graded across evidence score, safety, and cost-value. Filter by condition, sort by evidence grade. Free to embed with attribution. The Examine.com alternative.
Browse Evidence →Paste any supplement's ingredient list → instantly see evidence grades per ingredient, flag underdosed actives, expose proprietary blends, and identify poor-bioavailability forms.
Decode This Label →Interactive visual timeline showing when 30 supplements produce effects — from melatonin (30 min) to ashwagandha (8 weeks) to vitamin D tissue saturation (3 months). Filter by category.
See Timeline →Annual industry report: trending ingredients, hype vs evidence matrix, biggest clinical trials of 2025, market breakdown, and 2026 predictions. Free to cite.
Read Report →Search 55+ supplements to see which carry NSF Certified for Sport, USP Verified, Informed Sport, or ConsumerLab certification. The only free consumer-facing certification database.
Check Certification →Enter your city, skin type, and daily outdoor time → see how much vitamin D your skin can make each month across all 12 months. Shows exactly when you need to supplement.
Calculate My Synthesis →Exposes why cheap magnesium oxide costs more per absorbed milligram than glycinate. Enter price and servings → get true cost per absorbed dose vs category averages.
Calculate True Cost →Find the real daily cost of any supplement and compare two products head-to-head. See exactly which delivers better value per dollar over your planned duration.
Compare Costs →Enter your current supplement stack → see annual spend, flag duplicated ingredients, overlapping goals, and unnecessary purchases. Calculates exact annual savings from switching to generics.
Audit My Stack →Set your monthly budget ($20–$200) and health goals. Get the optimal evidence-based supplement stack for your money — priority-ranked so you spend on what matters most first.
Optimise My Budget →Find your optimal daily dose for 20+ supplements based on your weight, age, sex, and health goal. Evidence-based dosage ranges with clinical notes and best-form guidance.
Calculate My Dose →Enter supplement type, purchase date, and storage conditions → estimated remaining potency and whether it's worth taking. 21 supplement types with individual degradation models.
Check My Supplement →Country-by-country status for 8 key supplements (melatonin, NMN, kava, CBD, berberine, creatine, vitamin D, ephedra). Essential for travellers, athletes, and researchers.
Check My Country →Most supplement websites tell you what to buy but not how much to take, how much it costs per day, whether it's safe with your medication, or whether the marketing is misleading. These 15 tools were built to answer the practical questions that come before and after buying a supplement.
All tools are based on published clinical research, NIH guidelines, and systematic reviews. They are educational — not medical advice. Always discuss supplement use with your healthcare provider, especially if you take prescription medications.