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USN Cramp Block
USN Cramp Block USN Cramp Block USN Cramp Block

USN Cramp Block

Our Price
In stock, ships immediately
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above R300
Product Info

USN Cramp Block prevents cramping and buffers lactic acid build-up within the muscles. Cramp block provides your body with the vital minerals Sodium, Magnesium, Calcium and Potassium, which help prevent cramping and general muscle fatigue.

The inclusion of the amino acid Taurine, regulates the absorption of these minerals. Vitamin B6 aids in the maintaining of sodium and potassium balance, as well as promoting red blood cell formation. Cramp Block's advanced formula will improve your body's energy capacity, without the debilitating effects of cramp and lactic acid build up and cramping.

Nutrition Facts

Serving Size: 2 Tablets
Serving Per Container: 15

 Amount Per Serving % NRV*
Sodium Bicarbonate 300mg 
of which sodium 82mg 
Vitamin B6 5mg294
Calcium Carbonate 150mg 
of which calcium 60mg5
Magnesium Carbonate250mg 
of which magnesium 71mg17
Di-Potassium Phosphate50mg 
of which potassium22mg 
of which phosphorus 9mg 
* % Nutrient Reference Values (NRVs) for individuals 4 years and older (2010)


• Pre and during event: Take 2 tablets 30 minutes before the start of the event and 1 tablet per hour of exercise thereafter to prevent cramping.

• Post event: Take 2 tablets 30 minutes after the completion of the event, as well as 2 tablets before bed.

• Daily supplementation (maintenance): 2-4 tablets before bedtime to optimise absorption.

• Phosphate loading prior to events: Take 3-5 tablets twice daily in the 3 days prior to an event.

Do not exceed the recommended daily intake. Keep this product in a cool, dry place, out of reach of young children. This product does not intend to prevent or cure and form of illness or disease, and should not replace any medication.
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Customer Reviews
Awasome I used it on marathons
Review by Marathoner (2 December 2020)
Very nice it helps me on my 20miles training to 25miles.
The best
Review by Rasheed (17 August 2020)
It works 100% every time i used it for an event or just normal training
Review by Ngceshe  (8 October 2019)
I use this product during long run and it works for me
Review by Javatime girl (26 February 2019)
I use it for my work outs as directed and dont have cramps as before i even recommended it to my 80 year old mom nd she doesnt suffer from cramps any more … so i dont mind spending little extra
Review by Toz (12 April 2018)
It's working fine for me
Review by Jurgens (1 July 2011)
I used this product during a number of cycling events that I do. I seem to not get any cramps anymore and helps especially during the longer rides or multi day stage events. Although you need to take it for about 3 days prior to the event it is a bit expensive.
Dont waste your money
Review by Ayanda (19 February 2010)
I tried this product listen, do not waste your money on it. This is rubbish rather buy your wife a rose than purchasing this product.