Fein Energy Crystals

Caffeine Levels

per fl. oz packet


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Fein energy crystals can be added to any favorite beverage, even water, to make it an energy drink without altering the flavor. Fein's formula is all-natural caffeine citrate and a suite of secret, 100-percent natural "taste erasers."

Ingredients in Fein Energy Crystals

Sugar content: Contains no sugar.

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Caffeine Concentration

Fein Energy Crystals contains 9.38 mgs of caffeine per fluid ounce (31.70mg/100 ml).

Caffeine (mg) per Ounce
100 90 80 70 60 50 40 30 20 10 0 Fein Energy Crystals 5 Hour Energy Coffee (Espresso) Coca-Cola Classic Spike Energy Drink