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Energy

Nutrients and bioactives involved in energy metabolism, oxygen transport, and perceived fatigue.

Low energy can reflect sleep, stress, calories, iron status, thyroid disease, medications, or other medical issues. This page is not a deficiency diagnosis tool.

Iron

Oxygen transport and iron-status context

Folate

One-carbon metabolism and red blood cell context

Creatine

Rapid ATP recycling in muscle and brain

Caffeine

Alertness and performance context

Rhodiola

Traditional adaptogen with emerging fatigue evidence