Understand Your Supplements Better
Analyze your supplement stack, compare products, and discover smarter ways to build your wellness routine.
No sign-up required · Free to use · Evidence-informed
Your Stack
Vitamin D3
5,000 IU · Morning
Omega-3
1,040 mg · With meal
Magnesium
200 mg · Evening
Zinc
30 mg · With meal
Stack Score
Grade ANo duplicate ingredients
Your stack has no overlapping actives.
Synergy: D3 + Magnesium
Magnesium helps activate vitamin D.
Timing optimized
AM: D3, Omega-3 · PM: Magnesium, Zinc
Everything you need to vet your supplements
Three powerful tools that turn supplement confusion into confident, informed decisions.
Supplement Stack Checker
Check interactions, duplicate ingredients, dosage concerns, and optimize timing.
- Interaction detection
- Duplicate ingredient alerts
- Timing optimization
- Stack score
Supplement Compare
Compare products by ingredients, dosage, quality, and value — side by side.
- Ingredient-by-ingredient
- Cost per effective dose
- Pros & cons
- Best-for matching
Ingredient Database
Explore supplement ingredients, forms, benefits, and research summaries.
- 17+ ingredients
- Bioavailability by form
- Timing guidance
- Research-backed
Explore the most-searched supplements
Understand forms, absorption, timing, and research — before you buy.
Vitamin D3
Vitamin D3 (cholecalciferol) is more effective than D2 at raising 25(OH)D. It requires dietary fat for absorption and works synergistically with vitamin K2 and magnesium.
Magnesium Glycinate
Magnesium is a cofactor in 300+ enzymatic reactions. The glycinate form is well-absorbed and less likely to cause loose stools than oxide, making it preferred for sleep and relaxation use cases.
Creatine Monohydrate
Creatine monohydrate reliably increases phosphocreatine stores, improving repeated high-intensity output. It is among the most studied and safest sports supplements.
Omega-3 (EPA & DHA)
EPA and DHA from marine sources support cardiovascular and cognitive health. The triglyceride form shows superior absorption over ethyl esters, particularly when taken with dietary fat.
Collagen Peptides
Hydrolyzed collagen peptides supply amino acids that support skin, joint, and tendon tissue. Trials suggest modest improvements in skin hydration and joint comfort over 8–12 weeks.
Ashwagandha
Standardized ashwagandha extracts show modest reductions in perceived stress and cortisol in several controlled trials. Effects are typically seen over 4–8 weeks.
Products our community is checking
Real supplements vetted for ingredients, value, and quality.
NOW Foods
Vitamin D-3 5,000 IU
Qunol
Ubiquinol CoQ10 100 mg
NOW Foods
Zinc Picolinate 50 mg
Sports Research
Triple Strength Omega-3 Fish Oil
Learn the science behind your supplements
Evidence-informed guides that go deeper than a blog post — without the hype.
Magnesium Glycinate vs Magnesium Citrate: Which Form Is Right for You?
A detailed comparison of magnesium glycinate and citrate — absorption, use cases, side effects, and when to choose each form.
Can You Take Vitamin D and Magnesium Together?
Vitamin D and magnesium are a powerful pair — but timing and form matter. Here is what the research says about combining them.
Best Supplements For Sleep Quality: An Evidence-Informed Guide
From magnesium to melatonin to L-theanine — which supplements actually support sleep, and how to combine them safely.
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