Clean Caffeine

Bare Brew vs Celsius: Ingredients, Caffeine and Sugar Compared
If you're choosing between Bare Brew and Celsius, the labels tell you most of what you need. Both list zero sugar. One is black cold brew with 2 ingredients; the other is a sparkling energy drink with a sweetener and a botanical blend. Here's a side-by-side so you can decide which one belongs in your fridge. Bare Brew is our own product. This comparison sticks to label facts. Celsius figures come from Celsius's own website and were checked on October 30, 2026; where Celsius's pages didn't state a figure, we... Read more...
How Long Does Cold Brew Last? Fridge, Canned & Concentrate
Somebody finds a two-week-old jar of cold brew in the back of the fridge and asks the internet whether it's still coffee or a science experiment. Fair question. So let's answer it properly: how long does cold brew last? Homemade cold brew lasts about 5–7 days refrigerated, concentrate stretches to two weeks, and a sealed can lasts months — but the moment anything is opened or milk gets involved, the clock speeds up dramatically. Here's the complete breakdown, without the fluff. The Short Version: Cold Brew Shelf Life at a... Read more...
Cold Brew Recipes: 7 No-Added-Sugar Ways to Upgrade Your Cup
Cold brew recipes don't have to come with a paragraph of syrup. The simplest cold brew recipes start with two ingredients, coffee and water, and build flavor with spices, milks and whole-food add-ins instead of added sugar. A homemade cold brew can taste like a coffee-shop treat without the syrup. Below are seven recipes, a base method, and the easiest ways to sweeten cold brew without reaching for the sugar jar. The Base Recipe: How to Make Cold Brew at Home Every recipe here starts from one base. You need... Read more...
Coffee and Blood Sugar: What the Research Says
What large observational studies have found about coffee, caffeine and type 2 diabetes, what that research can't show, and how to read the sugar lines on a coffee label. Read more...
The Best Time to Drink Coffee, According to Your Cortisol
Updated October 30, 2026. An earlier version of this page gave a wake-time timing chart and said waiting for cortisol to fall makes coffee "hit harder." We could not find a primary study that shows that, so this version sticks to what published sources say about cortisol, caffeine and sleep. "Wait 90 minutes after waking before your first coffee" is popular advice, built on the idea that morning cortisol is already doing the waking-up job. It sounds neat. The research behind it is thinner than the advice suggests. Here's what... Read more...
Cold Brew Ingredients: What's Actually in Your Can
"Cold brew" describes how coffee is brewed, not what else goes in the can or bottle. Some black cold brews list only coffee and water. Others add natural flavor, chicory root fiber, phosphates or nitrogen. This guide shows a few labels as each brand publishes them and explains what the common ingredient terms mean. On this page Three Labels Side by Side What the Ingredient Terms Mean What to Look For on a Cold Brew Label Frequently Asked Questions What's in a can of Bare Brew No sugar. No dairy.... Read more...
Is Cold Brew Healthy? What the Science Actually Says
Cold brew has gone from a café experiment to a fixture in fridges and convenience stores. With that came a fair question: is cold brew actually healthy, or just trendy? The honest answer is that the research is mostly about coffee in general, very little of it is about cold brew specifically, and what you add to it matters. Here's what published research and public health agencies say, and what they don't.This is general information, not medical advice. First, what cold brew actually is Cold brew is coffee steeped in... Read more...
Cold Brew vs Espresso: Caffeine, Taste, and Which One Is Actually Better for You
Cold brew and espresso sit at opposite ends of the coffee spectrum, yet people constantly pit them against each other. One is brewed slow and cold over many hours. The other is forced hot through finely ground beans in about 25 seconds. They taste different, they're made differently, and — despite what most people assume — they don't deliver caffeine the way you'd expect. If you've ever stood at a counter wondering which one to order, or you're trying to figure out which belongs in your morning routine, this is... Read more...
Powerlifters, Caffeine and Cold Brew: What the Research Says
Walk into any powerlifting gym and you'll see the same pre-session options: a tub of pre-workout powder, a can of energy drink, or a coffee. All three are ways to get caffeine. This page looks at what the research says about caffeine and strength, what else comes along with each option, and how to compare labels so you know what you're actually taking. This is general information about published research, not medical or training advice. What the Research Says About Caffeine and Strength The main reference document is the International... Read more...
Hyrox Caffeine Strategy: What the Research Says
The 8 official Hyrox stations, what the ISSN 2021 position stand reports about caffeine and performance, and how to read caffeine on a label. Read more...
Cold Brew Concentrate: How to Spot Real Concentrate-Strength Clean Coffee
Cold brew concentrate is the purest expression of coffee: full extraction, high caffeine, minimum ingredients. But most brands water it down before canning. Here's how to find the real thing and why concentration matters. What Makes Cold Brew "Concentrate" Concentrate is cold brew brewed at a 1:4 to 1:5 coffee-to-water ratio—roughly twice the strength of ready-to-drink cold brew. It's designed to be potent. The key distinction: true concentrate is meant to be intense. It's coffee at its most concentrated, coldest extraction point. But there is a catch that applies to... Read more...
Coffee and Health: What Large Studies Have Found
What large studies and reviews report about coffee drinkers and long-term health, what they can't show, and official cautions, with links to each source. Read more...
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