Fein Energy Crystals

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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

This is a sugar-free energy drink - compare with other sugar-free energy drinks.

Compared to Other Items

Fein Energy Crystals contains 9.38 milligrams of caffeine per fluid ounce (31.70 mg per 100 ml). A 8 fl oz packet has a total of 75 milligrams of caffeine.

Total Caffeine (mg)