Ingredient Guides
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Does Oral GABA Actually Reach Your Brain? What the Blood-Brain Barrier Research Shows

GABA supplements are sold on a direct-to-brain mechanism that researchers say has never been demonstrated in humans. Here is what the trials actually show, and ...

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Quercetin: Why Absorption Matters More Than the Dose on the Label

Quercetin research is extensive, but a huge share of it is about the fact that standard quercetin is poorly absorbed. Here is what actually improves it, and ...

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Astaxanthin: The Antioxidant With a Real Bioavailability Problem Nobody Advertises

Astaxanthin has plausible antioxidant biomarker effects, but formulation and absorption issues are a genuine unresolved research problem, and human outcome ...

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PQQ for Mitochondrial Health: How It Compares to Urolithin A’s Evidence Base

PQQ targets mitochondrial biogenesis with genuinely interesting mechanisms, but its human trial base is much earlier-stage than urolithin A's. Here is an ...

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Ergothioneine: The ‘Longevity Vitamin’ With Strong Preclinical Science and Thin Human Trial Data

Ergothioneine has a genuinely compelling biological story - a dedicated cellular transporter, strong preclinical results. The human interventional trial ...

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Apigenin for Sleep: The 50mg Dose Everyone Takes Has Never Been Clinically Tested

Apigenin exploded in popularity after a podcast recommendation. The human trials that exist are for chamomile extract, not the isolated dose most people ...

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DIM (Diindolylmethane): What the Clinical Trials Actually Studied It For

DIM is sold as a general hormone-balance supplement, but its clinical trial evidence comes from cancer-prevention research. Here is what it actually does, and ...

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Is Creatine Safe for Kidneys? What the Science Actually Shows

Creatine raises serum creatinine (a kidney marker) without causing actual kidney damage — confirmed by 5-year studies measuring true GFR. We explain why the ...

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Best Supplements for Men Over 40: Evidence-Based Priorities

The 4 supplements with best evidence for men over 40: vitamin D3+K2, magnesium glycinate, creatine (benefits increase with age), and omega-3. We explain why ...

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Protein Timing After Workout: Does the Anabolic Window Actually Exist?

The anabolic window is overstated. A 2013 meta-analysis of 23 studies found protein timing has no independent effect when total daily protein is controlled. ...

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Does Creatine Cause Hair Loss? The Evidence Behind the Claim

One 2009 study showed creatine raised DHT in rugby players. No study has shown creatine causes hair loss. We review the single study everyone cites, what it ...

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Berberine vs Metformin: What a Head-to-Head Clinical Trial Shows

A direct RCT compared berberine vs metformin for type 2 diabetes — nearly identical blood glucose results. We review how berberine works, the evidence for ...

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