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Welcome to the HPRC Blog. We've got lots of information here, from quick tips to in-depth posts about detailed human performance optimization topics.

HPRC Fitness Arena: Dietary Supplements

FDA warns again about powdered caffeine

FDA issued warning letters to 5 distributors of powdered pure caffeine and continues to warn consumers against using these products.

The Food and Drug Administration (FDA) is again warning about the dangers of powdered pure caffeine. At least 2 deaths (both teenagers) were associated with it in 2014, yet it continues to be sold, primarily in bulk online. FDA recently sent warning letters to 5 distributors of pure powdered caffeine, warning about potential serious health effects. FDA notes that it’s difficult to determine the difference between a safe amount and a toxic amount but that one teaspoon is roughly equivalent to 28 cups of coffee. For more information, read FDA’s update and HPRC’s 2014 article.

Where to go for dietary supplement information

Visit OPSS—for the first time or again—for new FAQs, videos and PSAs, and print materials with information about dietary supplements.

Searching for reliable information about dietary supplements and don’t know where to go? Operation Supplement Safety (OPSS) has answers for you. OPSS has a comprehensive “Frequently Asked Questions (FAQs)” section with subcategories about general and miscellaneous topics, dietary supplement ingredients, performance, and weight loss. Or if you’re an educator and need some videos or short PSAs, click on “Tools for Warfighters,” and then search the “Video” tab. We also have materials that can be printed for distribution or ordered through the USAPHC Health Information Products e-catalog.

Didn’t find what you’re looking for while in OPSS? Use our Ask the Expert button located on the OPSS home page

Supplements and medications – What’s the problem?

Dietary supplements can affect how medications work in your body. Read more on what you can do to keep yourself safe.

Dietary supplements and medications (prescription or over-the-counter) can be a dangerous combination. Many dietary supplement ingredients, especially herbs and botanicals, can interact with drugs or even other dietary supplements, which can either increase or decrease the effectiveness of your medications. In other words, you could be getting too much or too little of the medications that you need, putting your health at risk.

If you are taking or plan on taking a dietary supplement, inform your healthcare provider to make sure it’s safe to use with your medications. Even then, you should still take caution, as some dietary supplements contain ingredients not listed on the label.

The Food and Drug Administration (FDA) advises consumers to be aware of certain supplement/drug interactions and offers tips to stay safe. For more information, see the FDA’s Consumer Update. And for information about many known interactions, visit the Natural Medicines Comprehensive Database (NMCD).

Protein powders: Food or supplements?

Some protein powders have Nutrition Facts labels while others have Supplement Facts labels. Is this a case of mislabeling?

Conventional foods and dietary supplements follow different rules when it comes to labeling, but the difference between the two isn’t always black and white. Such is the case with protein powders. If you look closely at various protein powders, you may notice that some are labeled with Nutrition Facts (required for foods), while others have Supplement Facts (required for supplements). So are protein powders conventional foods or dietary supplements? Read more in our OPSS FAQ on protein powder labels.

For more answers to common questions we’ve received about dietary supplements, please visit our Operation Supplement Safety FAQs.

What’s in your energy drink?

Energy drinks are really “stimulant” drinks. Learn how to identify potentially harmful ingredients.

Stimulants can be dangerous to your health, especially in large quantities, but they’re what give energy drinks their “punch.” You may already know caffeine is a major stimulant found in energy drinks. But do you know that energy drinks often contain other stimulants? These can include “hidden sources” of caffeine (such as guarana, green coffee bean, green tea, and yerba mate), yohimbe, and synephrine (bitter orange).

Many energy drinks, however, aren’t labeled with the amounts of caffeine or other stimulants in them. Some or all of these ingredients are often part of “proprietary blends,” so it’s impossible to determine from the label the exact amount of each ingredient you would be taking. Furthermore, energy drinks might be mislabeled or marketed as sports drinks, causing even more confusion.

Remember, stimulants come in many different forms, so Operation Supplement Safety (OPSS) put together a list of stimulants found in dietary supplements to help you identify these potentially harmful ingredients. And to help you understand what’s in your energy drink, check out the OPSS infosheet on energy drink labels, which includes helpful notes about ingredients. 

Have you had an adverse event?

Know the signs of an adverse event and how to report this important information.

An “adverse event” can occur as a result of taking some dietary supplements. Learn how to identify an adverse event from the Operation Supplement Safety (OPSS) FAQ, and find out where you can go to report one. And for healthcare providers, HPRC has a helpful video, “How to probe for dietary supplement use and report adverse events.” (Click on the “Video” tab to access the link.) Documenting adverse events is an essential part of how the Food and Drug Administration (FDA) evaluates potentially dangerous dietary supplements, so it’s very important to report potential problems.

What should I look for in sports drinks?

Sports drinks are popular products for fueling and hydration during workouts. Learn about what your sports drink should contain and how they stack up to nutrient recommendations for performance.

Sports drinks that contain electrolytes and carbohydrates can be essential to performance by replenishing what is lost during activity, mostly through sweat. For activities less than 60 minutes, water is the best drink to replace lost fluids. If your exercise session or mission exceeds 60 minutes, then sports drinks can be helpful. Follow HPRC’s guidelines for maintaining important nutrients such as fluid, carbohydrates, sodium, and potassium during activity to keep well hydrated and on top of your game. Read more here.

What are high-risk supplements?

HPRC Fitness Arena: Dietary Supplements
Some dietary supplement products contain problematic ingredients. Find out which ones might pose a health risk.

High-risk dietary supplements are those that may present serious health risks. Many have been found to contain undeclared drug ingredients, steroids, steroid-like ingredients, and/or stimulants, which can have negative and dangerous side effects. Products most commonly “tainted” in this way are those marketed for bodybuilding, performance enhancement, weight loss, sexual enhancement, and diabetes. Such products may also result in a positive drug test. For more information, read FDA’s Consumer Update “Tainted Products Marketed as Dietary Supplements.” For more information about urinalysis and drug testing, read HPRC’sDietary supplements and drug testing."

In addition, you can visit the OPSS High-Risk Supplement List for information about certain dietary supplements that may pose a health or sport anti-doping risk.

For more Frequently Asked Questions about dietary supplements, visit the Operation Supplement Safety (OPSS) FAQs.

The foundations of Total Force Fitness

Get back to basics with the foundations of Total Force Fitness: health, resilience, and performance optimization. What are they and how do they go together?

Have you heard the terms “resilience” and “Total Force Fitness,” but you’re not quite sure what they mean or where they fit into the health and performance picture? Read on.

Your health is the foundation. The 2010 article "Why Total Force Fitness?" states, “nothing works without health.” Health is not just physical and not just something to worry about when you’re sick. Health is a combination of physical, mental, spiritual, and social well-being and includes practices that promote wellness in addition to those that help you recover from sickness or injury.

Resilience is next. Resilience is the ability to bounce back—or even better, forward—and thrive after experiencing hardship. It is not the ability to completely withstand hardship but rather the ability to come back from it and grow stronger through the experience.

Next is human performance optimization (HPO). Unlike resilience, which typically requires the experience of hardship, HPO involves performing at your best for whatever goal or mission you have (whether that is your PT test, a combat mission, or raising children). It goes beyond simply resisting challenges; it means functioning at a new optimal level to face new challenges.

Health, resilience, and optimal performance are the foundations of Total Force Fitness, which is defined in the “Physical Fitness” chapter of “Total Force Fitness for the 21st Century” (see link above) as a “state in which the individual, family, and organization can sustain optimal well-being and performance under all conditions.” Being totally fit requires a holistic approach—that is, an approach that doesn’t focus on just one aspect alone such as nutrition or physical fitness, but on multiple domains of fitness. It means attending to your mind (including psychological, behavioral, spiritual, and social components) and your body (including physical, nutritional, medical and environmental components). In order to achieve Total Force Fitness, these factors come together to enhance your resilience and/or performance.

This is where HPRC can help you on your quest for total fitness. By visiting each of our domains—Physical Fitness, Environments, Nutrition, Dietary Supplements, Family & Relationships, and Mind Tactics—you can get evidence-based information on a variety of holistic topics to help you achieve and sustain total fitness. But remember that total fitness is a life-long process that will ebb and flow. And it isn’t just about you; your loved ones are an important piece of the picture, too.

To learn more, check out HPRC’s "What is 'Total Force Fitness'?" and for in-depth information, visit the Total Force Fitness Articles section of HPRC’s website.

The dirt on diatomaceous earth

Diatomaceous earth is promoted as a “cure-all,” but is there any truth behind the claims?

Diatomaceous earth (DE) is a powder composed of fossilized algae called “diatoms.” Diatoms are single-celled organisms found in bodies of water, and DE is used commonly for various reasons: 1) a natural insecticide; 2) an anti-caking agent; and 3) a clarifier for wine and beer. However, some people add food grade DE to their food and beverages because DE is a rich source of silicon dioxide. Silicon is a chemical element that occurs naturally as silicon dioxide in many foods, such as whole grains and vegetables.

Proponents of DE suggest that the high silicon dioxide content helps with weight loss, detoxification/cleansing, energy levels, joint pain, teeth and gums, cholesterol and blood pressure, and food absorption. Consumers and some retailers of DE supplements also claim that its abrasive (scratchy/rough) and absorptive properties improve digestive health by ridding the intestines of bacteria and parasites as well as regulating bowel movements.

There is not enough research to support these claims, and the biological role of silicon in humans is uncertain, so there is no recommended intake or DRI (Dietary Reference Intake). According to Natural Medicines Comprehensive Database, silicon is safe to consume in amounts commonly found in foods, but insufficient scientific evidence is available for its effectiveness and safety as a dietary supplement.

For more answers to common questions we’ve received about dietary supplements, please visit our Operation Supplement Safety (OPSS) FAQs.

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