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Increase sustained energy levels. Ranked by evidence strength from 77 supplements backed by peer-reviewed clinical research.
Top picks: Caffeine, Iodine, and Iron — full evidence and dosage details below.
"Energy" supplements fall into two very different categories: stimulants that mask fatigue (caffeine) and nutrients that correct a deficiency causing real fatigue (iron, B12, vitamin D). Caffeine has robust evidence for acute alertness and performance but doesn't address underlying causes. If fatigue is persistent, the highest-yield step is testing for and correcting deficiencies — supplementing iron when you're already iron-replete, for example, does nothing. Many "energy" blends lean on caffeine plus unproven adaptogens, so check the label against what has actually been studied.
Ranked by pooled effect on this goal's primary outcome where data exists, otherwise by overall evidence strength + goal relevance.
Showing 10 of 77
Research peptides — often limited or animal-only evidence. Listed for information and education, not as recommendations.
Experimental and unapproved compounds — including research chemicals, SARMs, and anabolic steroids. Listed for information and education, NOT recommendations. Many lack human evidence or carry serious risks — review each compound's safety rating before considering anything here.
Deciding between the best options? See them head to head — evidence scores, dosing, and safety side by side.
Pick the goals that matter to you and we'll match supplements across all of them.
Build my plan around this goalStudies tagged Energy & fatigue · 5000 considered
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.