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?
Where caffeine comes from, and the lab test that catches drinks mislabeled as natural.
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Ingredients · 6 min read
L-theanine and caffeine: what the research shows
Controlled trials found better attention and alertness with caffeine and L-theanine together.
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 why it’s so sweet
A fruit-based sweetener that’s 100 to 250 times sweeter than sugar.
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.