Most of what a can tells you is on the back, in small type, in an order that isn't accidental. Here's how to read it — including the part where we point out a problem with our own.
Start with ingredient order
Ingredients are listed by weight, most to least. This single rule tells you more than the marketing on the front ever will.
If a drink advertises real fruit and the juice appears eighth, behind three sweeteners and two acids, there is very little fruit in that can. If it appears second or third, there's a meaningful amount. Nobody has to lie for the front of the can to be misleading — they just have to put “made with real juice” in large type and let you not check.
“Natural flavors” and “real fruit juice” are not the same claim, and only one of them means there's fruit in the can.
Find the caffeine, and check what it's per
Caffeine content is usually stated separately from the nutrition panel, often in a small box. Two things to check:
- Per serving or per container? If a 16oz can lists two servings, the number you're reading may be half of what you'll actually drink.
- Does it say “from all sources”? Caffeine can come from added caffeine, green coffee bean extract, guarana, green tea extract, and yerba mate. A total is honest. A figure that only counts the added caffeine isn't the whole picture.
Look at what makes it sweet
Zero sugar doesn't mean nothing sweet. It means the sweetness came from somewhere that isn't sugar — most often sucralose, acesulfame potassium, or stevia, frequently two of them together.
None of those are dangerous. All are approved and widely studied. But “zero sugar” on the front and “sucralose, acesulfame potassium” on the back are describing the same decision from two directions, and you're entitled to know which trade-off you're buying.
Sucralose
Roughly 600 times sweeter than sugar. Tiny amounts do the job, which is why it's in nearly everything zero-sugar.
Acesulfame potassium (Ace-K)
Often paired with sucralose because the combination tastes less artificial than either alone.
Cane sugar and fruit juice
Real sweetness, real calories, real blood glucose response. The honest cost of not using the two above.
The proprietary blend problem
Here's the one that matters most in this category, and the one we have to own.
A proprietary blend is a group of ingredients listed together under a single name, with a combined weight or no weight at all, and no breakdown of how much of each. It's legal, it's extremely common in supplements and functional beverages, and it means you cannot tell whether the impressive-sounding ingredient list represents real amounts or a trace of each for the label.
That second scenario has a name in the supplement world — pixie-dusting. Put a milligram of ten fashionable ingredients in the can, list all ten on the front, and let the reader assume.
BRAiNLUBE currently uses a proprietary blend. Our ingredients are listed. The individual amounts are not. We're working on changing that, and until we do, you should treat our blend with the same scepticism you'd apply to anyone else's. We'd rather tell you that here than have you find it yourself.
What to do with a proprietary blend
Check what is disclosed — caffeine totals, sugar, calories, and full ingredient order are all still required. Judge the can on those, and treat the blend as unverified until the brand publishes numbers. Ask them. Brands that have good doses are usually happy to tell you.
Check the vitamins are actually declared
If a can advertises added B vitamins, zinc, or magnesium, those should appear in the Nutrition Facts panel with amounts and percent daily values — not just in the ingredient list. An ingredient list tells you something is present. The panel tells you how much.
A drink that names eight vitamins on the front and declares none of them in the panel is telling you less than it appears to be.
A thirty-second version
- Read the first four ingredients. That's most of what's in the can.
- Find total caffeine, and confirm it's per container.
- Identify the sweetener. Decide if that's the trade-off you want.
- Look for a proprietary blend. If there is one, everything inside it is unverified.
- Check that advertised vitamins are declared with amounts in the panel.
That's it. It takes half a minute, it works on any can in the cooler, and it will change what you buy more than any brand's marketing ever will — including ours.
General information about food labeling, not medical or regulatory advice. Labeling requirements vary by product category and jurisdiction. These statements have not been evaluated by the Food and Drug Administration.
