Health & Fitness Tools

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Supplements

Creatine Calculator

Calculate your optimal creatine dose for loading and maintenance phases.

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Supplements

Vitamin D Calculator

Estimate your vitamin D needs based on latitude, skin tone, and sun exposure.

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Supplements

Supplement Stack Builder

Build an evidence-based supplement stack ranked by scientific tier.

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Supplements

Omega-3 Calculator

Find your optimal EPA+DHA dose based on goals and current intake.

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Supplements

Melatonin Dose Guide

Find the right melatonin dose and timing for sleep optimization.

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Supplements

Pre-Workout Builder

Build an evidence-based pre-workout stack with proper dosing.

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Supplements

Probiotic Strain Guide

Match probiotic strains to specific health goals.

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Supplements

Adaptogen Guide

Compare adaptogenic herbs by evidence and best use.

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Supplements

Supplement Interaction Checker

Check for common supplement-supplement and supplement-drug interactions.

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Supplements

Sleep Supplement Stack

Evidence-ranked sleep supplements with proper dosing.

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Supplements

Supplement Timing Guide

When to take each supplement for maximum absorption and effect.

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Supplements

Magnesium Form Guide

Compare 8 forms of magnesium by absorption, benefit, and best use.

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Supplements

Probiotic Strain Matcher

Match specific probiotic strains to specific health conditions.

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Supplements

Collagen Supplement Guide

Types I, II, III collagen — which to take and when.

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Supplements

Vitamin D Complete Guide

Comprehensive vitamin D dosing, testing, and cofactor guide.

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Zinc Status Guide

Zinc testing, optimal forms, and dosing for athletes.

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B12 Complete Guide

Forms, dosing, testing, and who needs B12 supplementation.

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Iron Supplement Guide

When to supplement iron, which form, and absorption tips.

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Supplements

Electrolyte Supplement Guide

Compare electrolyte products: LMNT, Nuun, Pedialyte, and DIY.

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Supplements

Protein Powder Comparison

Whey vs casein vs plant vs blend — complete comparison.

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Supplements

Turkesterone Review

Evidence review: does turkesterone actually build muscle?

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Supplements

Betaine (TMG) Guide

Trimethylglycine for strength, homocysteine, and liver health.

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Supplements

Glycine for Sleep

3g glycine before bed: evidence for sleep quality improvement.

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Supplements

Tongkat Ali Review

Evidence for testosterone, stress, and sexual health benefits.