Reign isn’t meaningfully healthier than Monster. Both are zero-sugar energy drinks loaded with B vitamins, caffeine, and artificial sweeteners. The differences come down to caffeine dose, a few extra ingredients in Reign, and how those details line up with your habits and tolerance.
Caffeine: The Biggest Difference
A 16-ounce can of Reign Total Body Fuel contains 300 mg of caffeine. A standard 16-ounce Monster has 160 mg, and the low-carb and zero-sugar versions have 140 mg. That means Reign packs roughly twice the caffeine of a regular Monster in the same size can.
The FDA considers 400 mg per day a safe ceiling for most healthy adults. One Reign puts you at 75% of that limit before you’ve had your morning coffee. One Monster leaves more room. If you drink any other caffeinated beverages during the day, Reign makes it much easier to overshoot and end up with jitteriness, a racing heart, or trouble sleeping. For people who are smaller, caffeine-sensitive, or under 18, that 300 mg hit is especially aggressive.
Sugar and Sweeteners
Both Reign Total Body Fuel and Monster’s sugar-free lines (Ultra, Zero Sugar) skip added sugar entirely. The original Monster Energy, however, contains around 54 grams of sugar per can, which is more than a day’s worth of added sugar by most dietary guidelines. If you’re comparing Reign to original Monster, Reign wins on sugar by default.
When it comes to artificial sweeteners, the two brands overlap. Reign Total Body Fuel uses sucralose. Monster Ultra uses erythritol, sucralose, and acesulfame potassium. Monster Zero Sugar uses sucralose alone. None of these sweeteners add calories, and all are approved for use, but sucralose and acesulfame potassium remain debated in nutrition circles. There’s no clear advantage for either brand here.
B Vitamins: More Isn’t Better
Both drinks contain B vitamins well above the recommended daily value. Monster provides roughly 240% of the daily value for B6, 500% for B12, and 250% for niacin. Reign provides about 120% for B6, 250% for B12, and 130% for niacin. Monster actually contains higher percentages across the board.
That sounds like a point in Monster’s favor, but it isn’t. Your body excretes excess water-soluble B vitamins through urine. Unless you have a diagnosed deficiency, megadoses of B6 and B12 from an energy drink don’t translate into more energy or better performance. The amounts in both drinks far exceed what your body can use from a single serving, so the difference is irrelevant in practical terms.
Reign’s Extra Ingredients: BCAAs, CoQ10, Electrolytes
Reign markets itself as a fitness-oriented drink, listing branched-chain amino acids (BCAAs), CoQ10, and electrolytes on its label. Monster’s standard formulas don’t include these. On paper, this looks like a win for Reign. In practice, the picture is less impressive.
Reign doesn’t disclose the exact amounts of BCAAs, CoQ10, or electrolytes per can. Studies on BCAAs for exercise recovery typically use doses of 5 to 10 grams. The amount in a can of Reign, bundled into a proprietary blend, is almost certainly far below that threshold. Without knowing the dose, there’s no way to confirm a meaningful benefit.
CoQ10 is a compound your body already produces on its own. The German Federal Institute for Risk Assessment has stated that healthy people eating a normal diet don’t need supplemental CoQ10, and the European Food Safety Authority found that health claims tied to CoQ10, like “increases performance” or “strengthens the body’s defenses,” are scientifically unproven. Some people taking CoQ10 supplements have reported digestive side effects like nausea and heartburn, though these were generally mild at doses under 300 mg per day.
As for electrolytes, a can of Reign contains some sodium and potassium, but the amounts are modest compared to a dedicated sports drink or even a banana. If you’re sweating heavily during a workout, Reign’s electrolyte content is unlikely to replace what you’ve lost.
Calorie and Macro Comparison
Reign Total Body Fuel has 10 calories and zero sugar per can. Monster Ultra and Monster Zero Sugar are similarly low-calorie and sugar-free. The original Monster Energy runs about 210 calories and 54 grams of sugar. If you’re choosing between Reign and a sugar-free Monster, the calorie difference is negligible. If you’re choosing between Reign and original Monster, Reign is the lighter option by a wide margin.
Which One Is the Better Choice?
Neither drink qualifies as healthy in any meaningful sense. Both deliver large doses of caffeine, artificial sweeteners, and vitamins your body doesn’t need in those quantities. Reign’s added BCAAs and CoQ10 sound appealing on a label but lack the dosing transparency to back up real performance claims.
If your main concern is limiting caffeine, Monster is the safer pick at 140 to 160 mg per can versus Reign’s 300 mg. If your main concern is avoiding sugar, any of the zero-sugar options from either brand are equivalent. And if you’re drawn to Reign for its fitness ingredients, know that the functional extras are more marketing than substance at the doses likely included.
The most honest answer: the healthier energy drink is whichever one you consume less frequently. One can of either, a few times a week, is unlikely to cause problems for a healthy adult. Daily consumption of either, especially Reign with its high caffeine load, narrows your margin for error quickly.