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Supplements

Lab-tested reviews of protein powders, creatine, collagen, colostrum, greens powders, electrolytes, and more. Independent data, no pay-for-placement.

Products Reviewed
ProteinCreatineCollagenColostrumGreens PowdersElectrolytes

We buy every product ourselves. Lab-tested and blind-studied. Our methodology

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Most Popular
Protein Powder Review

Best Protein Powder

We tested 56 protein powders for formulation quality, third-party testing, ingredient transparency, and value per serving.

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Greens Powder Review

Best Greens Powder

We blind-tested 18 greens powders for taste, mixability, certification, and ingredient transparency.

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Creatine Review

Best Creatine

5 creatine monohydrate brands scored on purity, third-party certification, and value per serving.

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Collagen Review

Best Collagen

10 collagen brands scored on heavy metal contamination, third-party certification, sourcing transparency, and value.

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Electrolyte Review

Best Electrolytes

57 electrolyte brands scored on sodium accuracy, sugar content, ingredient purity, and hydration value. The largest independent electrolyte database on the web.

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Colostrum Review

Best Colostrum

10 colostrum brands scored on IgG content disclosure, third-party testing, sourcing transparency, dosing, and value.

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Most Popular
Probiotic Review

Best Probiotics

6 brands ranked on strain specificity, finished-product clinical trials, and delivery system.

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Further Reading
Are protein powders healthy?
What 56 brands tell us about quality, additives, and what to actually look for.
Is AG1 worth it?
We break down the ingredients, cost, and alternatives.
Do probiotics actually work?
What the AGA says about a $9 billion supplement category.
Protein microplastics: nobody tests for it
Your protein powder is probably full of plastic.
LMNT vs Liquid IV head-to-head
Two of the biggest electrolyte brands compared.
Is colostrum healthy?
We looked at what the science actually says.
Community Q&A

Popular Questions

See all
42
Is AG1 actually worth $79/month?
health_skeptic ✓ Answered
Greens
36
Do you need to load creatine or can you just take 5g daily?
gym_rat_mike ✓ Answered
Creatine
29
Do probiotics actually work? What the AGA says
sleepy_sarah ✓ Answered
Probiotics
25
Is bovine colostrum safe long-term?
gutcheck_99 ✓ Answered
Colostrum
22
Are greens powders a replacement for eating vegetables?
veggiesceptic ✓ Answered
Greens
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