March 23, 2026 by IS-BE Team

Celsius vs IS-BE: Which Clean Energy Drink Actually Delivers?

Celsius has carved out a massive share of the "better for you" energy drink market. And credit where it's due — they helped shift the conversation away from neon-colored sugar bombs. But is Celsius actually as clean as it claims?

We put Celsius head-to-head with IS-BE across every category that matters: ingredients, caffeine source, sugar, vitamins, and what's actually on the nutrition label. No bias. Just facts.

Caffeine Source: Where Your Energy Comes From Matters

Celsius uses a blend of caffeine from multiple sources — including guarana extract and green tea extract. The total caffeine content sits at 200mg per can. The issue? Guarana is essentially just another delivery vehicle for caffeine, not a fundamentally different ingredient. It still hits your system fast.

IS-BE sources 100mg of caffeine exclusively from organic green tea. That's it. No guarana, no synthetic caffeine, no mystery blends. Green tea caffeine is absorbed more gradually because it's naturally paired with L-theanine, which smooths the energy curve. You get focus without the spike-and-crash cycle.

The difference: IS-BE gives you a clean, sustained lift. Celsius gives you more raw caffeine, but the quality of that energy is a different conversation.

Sugar and Sweeteners

Celsius markets itself as sugar-free, which is technically true. But look at the ingredients: sucralose. That's the same artificial sweetener found in Splenda. Research on sucralose's long-term effects on gut health and insulin response is still evolving, but it's far from a clean-label ingredient.

IS-BE takes a different path entirely. We sweeten with organic cane sugar and real fruit — keeping our cans at just 60–70 calories. No artificial sweeteners, no sugar alcohols, no stevia aftertaste. Just enough sweetness from real ingredients to make it taste incredible without the junk.

Vitamins and Minerals: Beyond the Label

Celsius includes a handful of B vitamins and their proprietary MetaPlus blend (which includes ginger, green tea, and chromium). It's a decent profile, but nothing that stands out as exceptional.

IS-BE packs 200% of your daily Vitamin C, plus trace minerals and electrolytes including potassium, magnesium, and zinc. These aren't filler ingredients — they support hydration, immune function, and recovery. It's the kind of profile you'd expect from a wellness supplement, not a canned drink.

Ingredient Transparency

This is where the gap gets wide. Celsius uses "proprietary blends" — which legally means they don't have to disclose the exact amount of each ingredient within the blend. You know the total, but not the breakdown.

IS-BE has no proprietary blends. Every ingredient is listed with its exact amount. Organic green tea caffeine. Real fruit. Organic cane sugar. That's the whole story.

The Vibe

Celsius is a gym drink. It's marketed for fitness, fat burning, and pre-workout energy. If that's your lane, it works.

IS-BE is built for a different kind of person. Skaters, surfers, builders, thinkers — people who want clean energy that fits into a real lifestyle, not just a workout routine. IS-BE means Immortal Spiritual Being. It's a declaration, not a marketing angle.

The Bottom Line

Celsius is a better choice than Monster or Red Bull. But "better than garbage" isn't the bar IS-BE is trying to clear. If you want genuinely clean energy — organic caffeine, real ingredients, no artificial sweeteners, and actual transparency — IS-BE is the move.

Try IS-BE and feel the difference. Your body will know.