Side-by-Side Analysis
Compare Supplements Head-to-Head
Most comparison sites push whichever brand pays the highest commission. Supplement Comparisons does the opposite: we put products side by side and show you the actual differences in ingredients, forms, dosages, and pricing.
When you compare supplements directly, marketing claims fall apart. Brand A uses premium forms at low doses. Brand B uses budget forms at high doses. Which delivers more active ingredient? We calculate it for you.
✓ Real Comparisons
✓ No Hidden Rankings
✓ Actual Specifications
Start Comparing
Popular Comparisons
Vitamin D3
Compare D3 supplements — forms, doses, testing
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Omega-3 Fish Oil
Fish oil vs krill oil — EPA/DHA levels compared
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Probiotics
CFU counts, strains, and survival rates
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Magnesium
Glycinate vs citrate vs oxide absorption
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Collagen
Type I vs II vs III — which for what
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CoQ10
Ubiquinone vs ubiquinol forms compared
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Health Categories
Joint Health
Glucosamine, chondroitin, MSM head-to-head
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Heart Health
Cardiovascular supplements compared
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Brain & Memory
Nootropics and cognitive support
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Immune Support
Vitamin C, D, Zinc immune boosters
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Digestive Health
Probiotics, enzymes, fiber compared
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Sleep Support
Melatonin, magnesium, valerian compared
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How We Compare Products
Factor
What We Check
Why It Matters
Ingredient Forms
Chemical compound used
Absorption varies 4% to 90% by form
Exact Dosages
Milligrams per ingredient
Blends hide quantities — we verify
Testing
USP, NSF, ConsumerLab
Independent verification of label
Daily Cost
Price ÷ servings × serving size
Sticker price is misleading
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Frequently Asked Questions
How do you compare supplements without bias?
We put products side by side and list specifications. Five factors: ingredient forms, exact dosages, testing certifications, daily cost, and label transparency. Supplement Comparisons shows actual data — you decide what matters most.
Why do similar products have such different prices?
Ingredient costs, testing investments, marketing budgets, and margins vary. Higher price doesn't guarantee quality. Some $50 products spend $40 on marketing. Some $20 products spend $15 on ingredients. Compare specifications, not prices.
What's wrong with proprietary blends?
They hide individual ingredient amounts behind a single total. You can't compare products fairly when quantities are hidden. We prioritize products that disclose exact dosages over those using proprietary blend marketing.
Do testing certifications actually matter?
They're your independent verification. USP, NSF, and ConsumerLab test products and verify label accuracy. Without certification, you're trusting the brand. Testing removes the trust requirement.
How do I know which form of a vitamin to take?
Forms matter. Magnesium oxide absorbs poorly. Magnesium glycinate absorbs well. Methylcobalamin B12 works better for some. We identify the form each product uses so you can compare absorption potential.
Are your comparisons influenced by affiliate commissions?
No. We earn the same commission regardless of which product you choose. Supplement Comparisons compares specifications because that's what helps you decide. Pushing premium products for higher commissions would undermine the whole comparison model.