Cellucor, C4 Ultimate Pre-Workout Performance, 20 Servings

With a serving size of 17g, C4 Ultimate contains 6g of Citrulline Complex, a whopping 3.2g of Beta-Alanine and 1g each of Creatine Hydrochloride and Creatine Nitrate. This is a very strong pre-workout that contains efficacious doses for every ingredient and is definitely not for beginners.

C4 Ultimate has a large serving size, meaning the amount of servings in one container is low, only around 20. This might cost you a bit of money over time as C4 Ultimate isn't cheap as well.

People who have heart and blood pressure/coagulation problems should not take pre-workout as the ingredients in this product can cause problems. For example, Arginine affects blood pressure and can worsen your condition if you have high or low blood pressure. That being said, if you're taking any medications that affect blood pressure like a PDE-5 inhibitor (Viagra) you should also not take pre-workout. As always, if you have a medical condition, you should always consult a professional first.

A cool, dry place away from sunlight and direct heat. The ingredients in pre-workout are hydrophilic, meaning they will absorb water at any opportunity, causing clumps and possibly damage the ingredients. As a general rule, consume them within 3 months of opening, but that will vary depending on where you store them. A fridge may be beneficial.