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HPRC's human performance optimization (HPO) website is for U.S. Warfighters, their families, and those in the field of HPO who support them. The goal is Total Force Fitness: Warfighters optimized to carry out their mission as safely and effectively as possible.

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Journal EntryWhat’s in your energy drink?
Learn how to spot potentially problematic ingredients in energy drinks.
Located in HPRC Blog
Journal Entry ODS spreadsheetFDA to examine adding caffeine to foods
The FDA is investigating the recent trend of caffeine added to many food products and its possible effect on children and adolescents.
Located in HPRC Blog
Journal EntryGreen coffee beans—health or hype?
Weight-loss supplements with green coffee beans have been popular lately, but some products have more in them than just coffee beans. Get the facts about ingredients and always read product labels carefully.
Located in HPRC Blog
Journal Entry C headerCaffeine in supplements – how much?
Some of the most popular dietary supplements sold on military bases may give inaccurate—or no—information about caffeine content on their labels.
Located in HPRC Blog
Journal EntryAir Force studying caffeinated drinks
Air Force conducting study on 12 bases on the use of caffeinated drinks.
Located in HPRC Blog
Journal EntryCaffeine and performance—limit your intake for best performance.
Caffeine shouldn't be a replacement for sleep, and too much degrades your physical performance.
Located in HPRC Blog
Benefits and Risks
Caffeine
Located in Dietary Supplements / / Class 4 (Yellow Zone) Supplements / Caffeine
Dose Range and Upper Limit
Caffeine
Located in Dietary Supplements / / Class 4 (Yellow Zone) Supplements / Caffeine
Background
Caffeine
Located in Dietary Supplements / / Class 4 (Yellow Zone) Supplements / Caffeine
Journal EntryWhat are hidden sources of caffeine?
The labels on products often don’t mention caffeine content, so you have to know what ingredients contribute caffeine where you may not expect it.
Located in HPRC Blog