Evidence-Based Guides
The DOSED Blog
Deep dives on supplements for European buyers — studies, EU legality, and real vendor picks. No hype.
Latest
Regulation · GLP-1
FDA Cracks Down on GLP-1 Peptides: What It Actually Means for Europe (2026)
The FDA issued 7 warning letters targeting 20+ GLP-1 products. Here’s what changed in the US, why EU regulation is different, and how to stay safe buying peptides in Europe.
Read the full guide →More Guides
Nutrition · Omega-3
Omega-3 Fish Oil: Dosage, Forms, and the Best European Sources (2026)
Not all omega-3 supplements are equal. Full guide to EPA vs DHA ratios, rTG vs ethyl ester forms, optimal dosing, and where to buy quality fish oil in Europe.
Nootropics · Science
Creatine Is a Brain Drug: The Cognitive Benefits Nobody Talks About
Creatine monohydrate improves cognitive performance, fights mental fatigue, and may protect against neurodegeneration — for about €0.05/day.
Adaptogens · Comparison
Ashwagandha vs. Rhodiola Rosea: Which Adaptogen Do You Actually Need?
Ashwagandha lowers cortisol. Rhodiola fights fatigue. Both are adaptogens — but they work differently. Full comparison with studies, dosage, EU forms, and when to use each.
Vitamins · Dosage Guide
Vitamin D3 + K2 Dosage Guide for Europe: How Much Do You Actually Need?
The EU recommends 200 IU of vitamin D. Research says that's not enough. Full dosage guide for D3 + K2, with EU-specific data, blood testing, and where to buy.
Nutrition · Science
Magnesium Glycinate vs. Bisglycinate vs. Malate: Which Form Should You Take?
Magnesium glycinate and bisglycinate are the same compound. Malate is genuinely different. Real breakdown with 11 cited studies and EU brand picks.
Sleep · Protocol
The Huberman Sleep Stack in Europe: What to Buy, What to Skip, and Exact Doses
Everything European buyers need to know about magnesium L-threonate, apigenin, and L-theanine — with EU vendor picks and melatonin legality.
Longevity · NAD+
NMN vs. NR: The Complete European Buyer's Guide to NAD+ Supplements (2026)
Which NAD+ precursor is worth your money in Europe? Clinical evidence from 10+ trials, EU Novel Food legal status, and practical dosing.
Blood Sugar · Comparison
Berberine vs. Metformin: What the Research Actually Says About Blood Sugar
A 46-trial meta-analysis found berberine matches metformin for blood sugar control. Full comparison with mechanisms, dosage, EU legal status, and who should use which.
Nootropics · Mushrooms
Lion's Mane Mushroom: The Complete Evidence Guide for European Buyers (2026)
The only supplement with human data showing it stimulates Nerve Growth Factor. Full guide to dosage, fruiting body vs mycelium, EU sources, and what the research shows.