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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 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 Entry application/x-troff-meQuestions about C4 Extreme?
Will C4 Extreme cause you to “pop positive” on a drug test? Read the OPSS FAQ to find out the answer.
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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.
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Journal EntryDMAA products continue to dwindle
HPRC has updated its list of DMAA-containing products, showing that 20 more products have been discontinued or reformulated to exclude the ingredient.
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Journal EntryWhat’s the story with deer velvet and IGF-1?
Questions about deer velvet and IGF-1? Are they banned in the military? Read the OPSS FAQs to find out.
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Journal Entry Troff documentMinimalist running shoes: Do they really prevent injuries?
Barefoot-style running and minimalist running shoes are growing in popularity, but some new research now shows there are risks.
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Journal Entry ECMAScript programDietary supplements and surgical procedures
Be careful about using dietary supplements if you are planning to have surgery or if you have recently had surgery. Some ingredients could cause problems.
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Journal EntryRaspberry ketone—the latest weight-loss craze
Raspberry ketone is a food additive and aromatic compound now being sold as a dietary supplement/ingredient touted to reduce fat and weight. Find out the facts and the science behind it all.
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Journal EntryMask you a question?
Are you using your military Pro Mask correctly? Wearing your mask during exercise won’t prepare you for performing at altitudes, but increasing your respiratory muscle strength certainly has benefits for your performance.
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Journal Entry Octet StreamFDA Warns Consumers about DMAA
FDA urges consumers to check all dietary supplement product labels to ensure they do not contain the illegal stimulant DMAA.<br />
Located in HPRC Blog