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Product Detail & Benefits


The Anti-Fatigue Caps Formula:

Potassium/Magnesium Aspartate - A well-known nutritionist says it best regarding aspartic acid, "Because aspartic acid increases stamina, it is good for fatigue and plays a vital role in metabolism. It is good for athletes and helps to protect the liver by aiding in the removal of excess ammonia." Studies (Agersborg and Shaw 1962, Hicks 1964, Gaby 1982) show this combination provides substantial benefit to the prevention of fatigue. Aspartic acid also combines with other amino acids to form molecules that absorb toxins and remove them from the bloodstream, aids the function of RNA and DNA, and helps to protect the liver. Additionally, the potassium/magnesium aspartate compound increases production of a key substrate, oxaloacetate, which is involved in energy production.

OKG - Both ornithine and alpha-ketoglutarate (OKG) provide a readily available, non ammonia-producing source of glutamine in the body. Glutamine is depleted at high rates during exercise but cannot be replaced with regular glutamine as it creates excess ammonia on its own. OKG increases the amount of glutamine in the muscle and also helps prevent muscle catabolism. Another well-known nutritionist writes, "Both ornithine and alpha-ketoglutarate act in the body as an ammonia scavenger."


Extra Benefits:
Although Anti-Fatigue Caps is designed primarily for ammonia reduction in long distance events, the nutrients in the formula are excellent for helping counteract everyday fatigue, even chronic fatigue symptoms.

Thoroughly tested over several years in the most extreme athletic endurance events, Anti-Fatigue Caps helps remove fatigue-causing, performance-robbing ammonia. During extended endurance exercise the body accumulates excess ammonia from protein metabolism, which interferes with glycogen production, disrupting energy output. Anti-Fatigue Caps is a one-of-a-kind supplement combining two well-known ammonia-scavenging nutrients. Clean up the waste products of combustion, or you'll pay the price. To stay strong in multi-hour events, you need Anti-Fatigue Caps.


  • Potent aspartate compound, yielding significant amounts of potassium and magnesium.
  • 10 mg per capsule of EES™ (blend of protease and phytase enzymes) for greater absorption and assimilation of the key nutrients in Anti-Fatigue Caps.
  • All vegetable (VCaps™) capsules.

Nutrition Labels:

Anti-Fatigue Caps
Supplement Facts
Serving Size 2 Capsules
Amount Per Serving % Daily Value*
Potassium Magnesium Aspartate 500mg
Magnesium (as magnesium aspartate) 50mg 12%
Potassium (as potassium aspartate) 70mg 2%
OKG (Ornithine alpha-ketoglutarate) 480mg
Enzyme Enhancement System™ (EES - A proprietary blend of protease and amylase 20mg
* The Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
† Daily Value not established.
Other Ingredients: Stabilized Rice Bran, Beet Juice, Vegetable Capsules (plant cellulose and water)

Nutrition & Usage Tips

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Product Reviews

Rated 5 out of 5 by from Delivery as promised I was running low on Anit-Fatigue caps with a very hilly 7-day supported ride coming up. The product arrived in 2 days, as advertised. Similar order thru Amazon took much longer than advertised.
Date published: 2015-07-31
Rated 5 out of 5 by from These ABSOLUTELY work with one caveat: These ABSOLUTELY work with one caveat: My personal experience is that AF caps work surprisingly well, unless you use them all of the time. It seems that with constant use (like daily rides), I either develop a tolerance or they just lose their "shine". BUT, when used only on those "special" or "gotta-go-hard-days" they are impressive. Constant use = "dull" or ineffective Occasional Use on Race Day Efforts = may impress you more YMMV
Date published: 2015-07-11
Rated 5 out of 5 by from Thank Goodness for this product It gave me a boost when I needed it and it is gluten free!
Date published: 2015-07-01
Rated 5 out of 5 by from used it on my 50 mile training ride yesterday. Can tell it helped with energy for the whole ride. just like all the other Hammer produce .....they work
Date published: 2015-06-28
Rated 5 out of 5 by from Great product! Anti-Fatigue really works! These capsules really help you stay strong till the end. They greatly reduce cramping and when paired with the Endurolytes, WOW! Performance all your competitors will envy.
Date published: 2015-06-15
Rated 5 out of 5 by from life saver I used them when I did the Montana spartan beast race and if I didn't have them......there is no way I would of been able to get up over those steep inclines and be able to continue. Highly recommend!!!!
Date published: 2015-05-13
Rated 5 out of 5 by from Great for climbing, too! Took these up to the Alaska Range on a climbing trip for a week and was happy with the results. Took a couple before enduro climbing outings and continued to take 1-2 each hour during the climb. With limited water, these kept the my energy up and cramping was never an issue! Not just for racing!
Date published: 2015-05-04
Rated 5 out of 5 by from Love these! Anti-fatigue caps help keep me going, I take two every hour during my 50-100 mile rides. Recently, anti-fatigue caps has helped me start become a better climber here in the Colorado mountains.No leg cramps, now I can attack these hills with confidence.
Date published: 2015-04-12
  • 2015-08-03T07:15CST
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