Caffeine in Drinks

Fein Energy Crystals

Discontinued? This item may no longer be available.

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 drinks.

Is Fein Energy Crystals high in caffeine?

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

Total Caffeine (mg)