Goal
Best Supplements for Energy
2 evidence-based options for energy, summarized from the research: what they do, how to dose them, and how they work together.
Caffeine
The world's most popular cognitive stimulant.
NootropicsStrong
2 connectionsEnergy · Focus
Iron
Oxygen-carrying mineral critical for energy.
MineralsStrong
2 connectionsEnergy · Blood health
Combinations to know
How these supplements pair with each other and beyond.
Synergy
Caffeine + L-Theanine
The classic nootropic stack: L-theanine smooths caffeine's jitters while preserving the focus boost.
Nootropics · Amino Acids
Boosts absorption
Iron + Vitamin C
Taken together, vitamin C can multiply the absorption of plant-based iron.
Minerals · Vitamins
Use with care
Calcium + Iron
Calcium taken at the same time inhibits iron absorption; separate them by at least two hours.
Minerals · Minerals
Use with care
Caffeine + Creatine
Some early data hinted caffeine might blunt creatine's effects; evidence is mixed and any effect is likely minor.
Nootropics · Amino Acids