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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 i have used anti fatigue for years with endurance aminos never failed me when the envelope is wide open
Date published: 2015-03-01
Rated 5 out of 5 by from Pleasantly surprised about how good these are ! So I read the reviews and thought I'd give them a try - after all, Hammer products have never let me down so far.... and again, they didn't let me down. Having not run heavily in the last few years, I started running again, and to my pleasant surprise, when taking a couple of anti-fatigue caps in conjunction with a couple of endurolytes (which I also recommend) all washed down with lemon/lime HEED I found that I could run longer, faster and recover quicker - without the DOMS issues that I used to suffer from. Have just ordered some more. I am a convert !
Date published: 2015-02-23
Rated 5 out of 5 by from awesome I used it for a 6 mile run on the treadmill. I felt great. wanted to run forever. love this stuff.
Date published: 2015-01-27
Rated 5 out of 5 by from PR I used Energy Surge and Anti Fatigue Caps for the first time in a race. Couldn't believe the amount of energy I had at the starting line. I ended up running my fastest mile ever as well as setting a new Personal Record by 16 seconds in the 5K.
Date published: 2014-10-29
Rated 5 out of 5 by from great ! I 've use it twice and it works great! I don't get any kind of cramps
Date published: 2014-08-05
Rated 5 out of 5 by from Anti-fatigue caps comments Anti-fatigue caps work as advertised... I have a lot more endurance than without them. One of the benefits that I get is that my legs don't ache at night nearly as much than without them. They allow me to train more aggressively because I don't get that tired feeling in my legs. Thanks, they work great!
Date published: 2014-07-08
Rated 5 out of 5 by from So far so good I've only used these with Endurance Aminos in two events so far so I won't say anything with any authority, but...I used them in a 3 hour marathon canoe race that I've done two previous years where I was a hurting unit at 2 hours, and this year I felt great. Could be my conditioning, but I tried the AF caps and they seemed to work. I also used them in a half century, and they definitely worked. I had no cramps or fatigue at any point. So far so good. Will be incorporating these little nugs of gold into my training as well.
Date published: 2014-07-04
Rated 5 out of 5 by from Anti-Fatigue Caps really work! Long, Hot rides are a lot better when I use Anti-Fatigue Caps in addition to my regular Hammer products. Helps to make the miles just fly by!
Date published: 2014-06-15
  • 2015-03-30T08:12CST
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