Oolong Tea
Oolong is a partially oxidized tea with caffeine and catechins. It modestly raised energy expenditure in a small study, an effect similar to caffeine ...
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Ingredient type
Natural Stimulants
Ingredients like caffeine and green tea that increase alertness and slightly raise energy use. They can cause jitters, sleep problems and raise heart rate.
Oolong Tea
Theobromine
Theobromine is a mild caffeine-like compound from cocoa. It has gentle stimulant and blood vessel effects, but no good evidence for blood sugar contro...
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Theacrine (as TeaCrine)
Theacrine is a caffeine-related compound from a Chinese tea plant, sold as TeaCrine for energy and focus. An 8-week study found it well tolerated at u...
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Guarana
Guarana is a Brazilian seed that is a natural source of caffeine. It may add a stimulant effect to formulas, but it does not support blood sugar and i...
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Cayenne pepper
Cayenne's capsaicinoids slightly increase energy expenditure and fat oxidation, by roughly 34 calories a day at rest in pooled studies. It has no rese...
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