Bum Energy Drink: Chris Bumstead's Enny

Bum Energy Drink is the flagship RTD from Bum Energy, the caffeine brand built around six-time Mr. Olympia Classic Physique champion Chris Bumstead. Where a lot of the category is still chasing 300mg-plus caffeine numbers, Bum Energy zigs the other way: 112mg of natural caffeine, paired with a clinically dosed nootropic instead of a bigger stimulant hit. The brand's whole pitch is right there in its own tagline: "Less Caffeine. More Focus. Zero Sugar."

That's a real positioning bet, not just marketing copy. Bum Energy and its parent company, Raw Nutrition, were acquired by The Quality Group (the German supplement powerhouse behind ESN and More Nutrition) in 2025, giving the brand real backing to scale a moderate-caffeine, nootropic-forward formula against a field of drinks that mostly compete on caffeine milligrams.

Bum Energy Drink Ingredients

Each 12 fl oz can provides two active ingredients doing the heavy lifting, plus a short, clean supporting cast.

• Natural Caffeine (from Coffee Bean) - 112mg

  Caffeine is the ingredient every energy drink is built around, and Bum Energy's 112mg dose sits well below the 200-300mg range common in the category. Mechanistically, caffeine works by blocking the signal that makes you feel tired: it competitively antagonizes adenosine receptors in the brain, which otherwise suppress arousal as the day wears on.^[1] That's what clears the fog and gets you moving.

  This dose lands on the conservative end by design. Research shows caffeine's cognitive benefits, especially vigilance and reaction time, kick in as low as 32mg and scale up through roughly 300mg.^[2] So 112mg is squarely in the range shown to sharpen attention without pushing into jitter territory for most people. On the physical performance side, the sweet spot for ergogenic effects is typically 3-6mg/kg body weight, which for a 70kg adult would land closer to 210-420mg.^[3] That means Bum Energy's dose is built more for smooth, sustained mental energy than for maximizing a gym pump, which tracks with the brand's "smooth, sustained energy" language on the label. It's also well under the FDA's 400mg/day GRAS threshold for healthy adults, leaving plenty of room if you're stacking with other caffeinated products during the day.^[4]

• Cognizin (Citicoline) - 250mg

  

  Cognizin is the branded, clinically studied form of citicoline that gives this formula its "more focus" half of the equation. Citicoline gets broken down into choline and cytidine after you drink it, and those building blocks get put back to work making and repairing the phospholipids that make up your brain cell membranes. Along the way, it also feeds the pathway your brain uses to make dopamine, supporting the kind of locked-in attention state Bum Energy is chasing.

  The 250mg dose here isn't arbitrary. It's the exact amount shown in a randomized, placebo-controlled trial to reduce both omission and commission errors on a standard attention test in adults over 28 days.^[5] A separate RCT in adolescent males found that citicoline supplementation improved motor speed and attentional speed compared to placebo over the same timeframe.^[6] Brain imaging studies back up the mechanism too: citicoline supplementation has been shown to increase markers of brain energy production in the anterior cingulate cortex, a region tied to attention and working memory.^[7] Pairing a research-backed 250mg citicoline dose with a moderate caffeine hit is a smarter play than just cranking the stimulant dial, and it's the main reason this formula reads differently than most cans on the shelf.

• Other Ingredients

  

  • Carbonated Water is the base of the drink, providing the carbonation and mouthfeel you'd expect from an RTD energy drink.
  • Citric Acid and Malic Acid are both tart organic acids that provide the sour backbone of the flavor profile and help balance sweetness.
  • Natural Flavors deliver the specific taste identity of each SKU, whether that's raspberry, cherry, or another variant in the lineup.
  • Sucralose is the zero-calorie sweetener responsible for the "Zero Sugar" claim on the can, providing sweetness without contributing carbohydrates.
  • Benzoic Acid and Potassium Sorbate are both standard preservatives used to prevent microbial growth and extend shelf life in acidic beverages like this one.

Flavors Available

Who It's For

• Focus-first drinkers: If you've been burned by 300mg-caffeine cans that leave you wired but scattered, the lower caffeine dose paired with a clinical Cognizin dose is built for you specifically.
• Afternoon and evening users: The moderate 112mg caffeine load makes this a more realistic pick later in the day than a high-stim can, without giving up the mental sharpness.

The Bet on Less Caffeine, More Cognizin

The 250mg Cognizin dose matches what's actually been studied in clinical trials for attention and memory, and the 112mg caffeine dose is calibrated for cognitive benefit rather than maximum stimulation. Skip this one if you're after a hard jolt, but it's one of the more defensible focus-first formulas on the shelf.

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References

1. Fredholm, Bertil B. et al. "Actions of Caffeine in the Brain with Special Reference to Factors That Contribute to Its Widespread Use." Pharmacological Reviews, 1999. https://doi.org/10.1016/S0031-6997(24)01396-6
2. McLellan, Tom M. et al. "A Review Of Caffeine S Effects On Cognitive Physical And Occupational Performance." Neuroscience & Biobehavioral Reviews, 2016. https://doi.org/10.1016/j.neubiorev.2016.09.001
3. Guest, Nanci S. et al. "International Society Of Sports Nutrition Position Stand Caffeine And Exercise Performance." Journal of the International Society of Sports Nutrition, 2021. https://doi.org/10.1186/s12970-020-00383-4
4. Wikoff, Daniele, et al. "Systematic review of the potential adverse effects of caffeine consumption in healthy adults, pregnant women, adolescents, and children." Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 2017. https://doi.org/10.1016/j.fct.2017.04.002
5. McGlade, Erin, et al. "Improved Attentional Performance Following Citicoline Administration In Healthy Adult Women." Food and Nutrition Sciences, 2012. https://doi.org/10.4236/fns.2012.36103
6. McGlade, Erin, et al. "The Effect of Citicoline Supplementation on Motor Speed and Attention in Adolescent Males." Journal of attention disorders, 2019. https://doi.org/10.1177/1087054715593633
7. Silveri, M M, et al. "Citicoline enhances frontal lobe bioenergetics as measured by phosphorus magnetic resonance spectroscopy." NMR in biomedicine, 2008. https://doi.org/10.1002/nbm.1281