Know exactly what’s in your can.
Guides to caffeine, sweeteners and every ingredient we use, with every number linked to its source.
Label reading · 7 min read
What is a clean energy drink?
There’s no legal definition of clean. Four label checks tell you what’s in the can.
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Caffeine · 9 min read
How much caffeine is too much?
The 400 mg figure, the 200 mg single-dose marker, a caffeine chart, and a calculator for your real day.
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Caffeine · 6 min read
Natural vs synthetic caffeine: what’s the difference?
They’re the same molecule. The difference is the source, and a lab test that catches mislabeled drinks.
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Ingredients · 6 min read
L-theanine and caffeine: what the research shows
Small trials found better attention with the pair. A review found caffeine did most of the work.
Read the articleCaffeine · 6 min read
Matcha vs coffee: which has more caffeine?
Matcha has more caffeine per gram, but a cup of coffee usually has more per serving.
Read the articleSweeteners · 7 min read
Monk fruit sweetener: what it is and what regulators say
100 to 250 times sweeter than sugar, and viewed differently by US and European regulators.
Read the articleIngredient glossary
Methylcobalamin, mogrosides, DFE, GRAS. Every ingredient and label term in Romeé, defined in a sentence or two, with the source behind it.