Rockstar Zero Carb: Too Much Caffeine?

During research for the caffeine database, we came across some interesting caffeine levels in Rockstar Zero Carb (check out the Rockstar graph).

This energy drink boasts that it contains 50% more caffeine than other Rockstar drinks.

Rockstar already pack a reasonable wallop of caffeine – so what does the Zero Carb have? A close read of the nutrition label tells us that:

• 16oz can has 240mg caffeine.
• 24oz can has 360mg caffeine.

Congratulations Rockstar – you now have what is arguably the most potent energy drink on the market.

Has anyone tried Rockstar Zero Carb? It has a very similar formulation to Sugar-Free Rockstar – in that it is sweetened with ace-k and sucralose (Splenda). However Zero Carb lacks some herbal ingredients such as Panax ginseng, Milk thistle, and Ginkgo Biloba.