Does black tea raise cortisol?
Does black tea raise cortisol? Tea: Covered in 3 studies with ~800 subjects, tea (20–60 mg caffeine per serving) showed a milder cortisol increase of 20%. Examples include black tea (e. Earl Grey, English Breakfast), green tea, matcha, and iced tea. Tea’s effects are moderated by L-theanine, which promotes relaxation. In a 2006 study that […]
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