SupplementDB
All supplements

Every compound,
the same honest read.

Organised by goal. Each compound tells you what the evidence actually supports, the right dose, what to watch out for, and what not to believe.

Sleep & Recovery

Wind down, wake up restored
Glycine
The quiet amino acid behind better mornings
Magnesium
The mineral most people are not getting enough of
L-Theanine
Calm attention without sedation
Melatonin
A timing signal, not a sedative

Performance

Strength, output, endurance
Creatine
The most studied performance supplement that actually works
Caffeine
The world's most used and best-studied stimulant
Beta-Alanine
The tingly amino acid for sustained high-intensity effort
Citrulline
Better blood flow, less fatigue, more reps
electrolytes
Useful when sweat losses are real

Longevity & General Health

Foundational, boring, effective
Omega-3
The foundational fat most people do not eat enough of
Vitamin D
The sunshine vitamin most people indoors are deficient in
Protein
Useful food, not magic muscle dust
collagen
A protein source with narrow, specific claims — and a lot of overclaim
taurine
A conditionally essential amino acid having a hype moment

Stress & Focus

Calm attention, steadier days
L-Theanine
Calm attention without sedation
Rhodiola
The fatigue adaptogen with a surprisingly good trial record
Ashwagandha
The adaptogen with the most human trial data

Deficiency Basics

Fix the floor before optimizing the ceiling
Iron
The most common nutritional deficiency in the world — but test before you supplement
Vitamin B12
Essential for vegans and older adults — and only useful if you are actually deficient
zinc
Essential mineral, narrow supplement case
Magnesium
The mineral most people are not getting enough of
Vitamin D
The sunshine vitamin most people indoors are deficient in
vitamin-c
Essential, cheap, mostly uninteresting at high doses