Cellucor C4 Smart Energy Drink – Boost Focus and Energy with Zero Sugar, Natural Energy, and Nootropics - 200mg Caffeine - Peach Mango - 12 FL OZ (355 ml) - Pack of 12

Noticeable improvement in energy level and focus on the C4 Smart Energy version. Bought this for working on a critical project, had it in the morning after breakfast. I was able to avoid mental and physical fatigue and keep working for 10+ hours straight, with full on energy, focus and motivation, without needing any breaks/coffee/tea in between. Remember you can have only one per day and I believe its not recommended to use this continuously for more than 8 weeks. I intend to use this only when I have something critical to get done. Taste is very good (Peach Mango / Smart Energy)

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I have tried so many flavours and so far this is the tastiest flavour , never get bored of it , and it make you workout for 3 hours non stop ! Unfortunately must of cans are half empty, so it's a rip off!!!

I have been drinking these ever since I started taking my ultrasound physics course to help with studying and testing and let me tell u... these make me focus and enjoy my learning time a lot more. I am generally a very curious person and love to learn but I also struggle with unmedicated ADHD so coffee has always helped me in the past with waking up and that boost of mental clarity and energy but I needed something more to keep my mind from wandering off and seeking those dopamine rewarding stimulators that would prohibit my studying and the Smart Energy C4 was just the right thing for that! Not only does it give me that perfect energy boost I need from caffeine, it also has a different ingredient than other energy drinks I have tried called Citicoline (in their ingredients it is called Cognizin Citicoline which is just a brand of Citicoline). But here's the cool thing about Citicoline... its a nootropic! Nootropics are a class of drugs that improve brain function. ADHD meds are a type of nootropic but in a different form. Citicoline works to improve brain function and memory and has been studied to even release some sort of dopamine stimulation in the brain. It acts to increase cell membrane stabilization and in re-synthesizing our phospholipids quickly in our mitochondria of our cells. I would look it up if you want to know more but it's so interesting how Citicoline works in our bodies! Anywaysss to diverge from that, I have always had such a pleasant experience with these. I have mood boosts, I am able to focus on one thing at a time, get my work done, recall information 10x better, I am much more curious, and the flavor is sooo tasty. Definitely would say tho, don't drink more than one a day, specially if you have already had a caffeinated drink or are on some sort of medication that speeds up your heart like any other stimulant! I am not a doctor but I am educated enough on this to know you shouldn't do that. But yeah one should do it! I typically don't even finish an entire one in one sitting I usually sip it throughout the day or drink half at a time. It's a wonderful drink that I am glad I found :) Highly recommend if you are a prior gifted kid like me and struggle with burnout or ADHD and know your capabilities but struggle to use them... it has been a real life saver!

Delicious, good energy, please bring more flavours to intl prime shipping.

I like this product for the taste, zero sugar and only a few adders other than the 200mg caffeine. Energy support comes from the caffeine and B3, while B12 will help with brain and nervous system support. B12 really doesn't create energy, unless you have a B12 deficiency and you would know it if you did. The C4 product has reasonable carbonation, is a quality drink and, based on how B3 is in your diet, may create a little niacin flush with a tingle that will pass. And, since there is zero sugar, you get the best of both worlds. Science says we can handle about 400mg of caffeine per day for an average adult.

When i first bought these i honestly was super skeptical, could it really? help me focus. The answer to that, is yes! Worked like a charm. I have only tried the mango peach and it is delicious. The size of the can was good, not too much so it goes flat, enough to feel like you want to drink it. zero sugar, no jitters and the cans have always come in good condition.

We love this stuff! It is far more tasty than the usual drink. It is not carbonated, very tasty, and better both for your teeth and waistline compared to the usual sugar containing "drink" with virtually no calories and good "shelf life".