C4 Carbonated OTD RTD (Ready to Drink) is a pre-workout energy drink designed for pre-workout use and convenience. It boosts energy and focus, is zero sugar, zero calorie, and zero carb, and is available in a variety of flavors. The “OTD” likely refers to “Over the Counter” or “Out of the Delivery” which would mean that the product is designed for consumers to purchase directly, without a prescription or for use outside of sports nutrition.

Brand

Cellucor