C4 is not the most sophisticated pre-workout on the market, but it hits a combination that a lot of people value: it is affordable, it is widely available, it works, and it comes in a huge variety of flavors. For someone who is new to pre-workouts or who just wants a straightforward energy boost before a workout without overthinking it, C4 delivers that reliably.
The brand has been around since 2011 and the Original formula has been refined over the years. At this point it is a known quantity. You know what you are going to get when you open a tub of C4.
Here is where I will be honest with you. C4 uses a proprietary blend for some of its ingredients, which means you do not know the exact doses of everything in the formula. That is a transparency issue that premium brands like Legion and Transparent Labs have moved away from, and it puts C4 at a disadvantage for informed consumers.
What you can see clearly is 150 milligrams of caffeine per scoop, which is a moderate dose. You also get some beta-alanine, which explains the tingling you will feel, and creatine nitrate, which combines creatine with nitrate for a pump effect. The doses are functional but not necessarily at the clinical levels you would see in a fully transparent formula.
The energy from C4 is real and consistent. At 150 milligrams of caffeine it is not an extreme amount, which makes it accessible for a wider range of people including those who are more caffeine sensitive. The energy is clean enough, the focus is there, and most people find that their workouts feel noticeably better with it than without it.
C4 has an enormous flavor lineup and most of them are genuinely good. The flavors tend to be sweet and slightly artificial, which is a fair trade for the taste quality. Fruit Punch, Blue Raspberry, and Watermelon are all popular for a reason. This is an area where C4 clearly outperforms most premium pre-workouts that prioritize natural flavoring.
C4 is a solid choice for beginners, for people who prioritize taste and convenience over ingredient purity, for gym-goers on a budget, and for anyone who just wants a reliable energy boost without spending a lot of time thinking about it. If you are an experienced user who cares about ingredient transparency and clinical dosing, you will probably want to look at Legion Pulse or Transparent Labs instead.
| Caffeine | 150mg |
| Beta-Alanine | 1.6g |
| Creatine Nitrate | 1g |
| Proprietary Blend | Yes (partial) |
| Artificial Sweeteners | Yes (sucralose) |
| Servings | 60 |
| Price per Serving | ~$0.64 |
| Flavor Options | 30+ |