5g exogenous ketones plus 100mg natural caffeine from green tea in a single-serve shot. No sugar, no jitters reported by users. Comes in six flavors (raspberry, blue raspberry, lemonade, etc.); take 1–3 daily for steady energy or pre-workout fuel.
Exogenous ketones show modest acute effects on blood ketone elevation and some cognitive/endurance outcomes in small trials, but evidence for practical performance gains is inconsistent and often confounded by caffeine. Caffeine itself is well-established for alertness, but the added value of ketones beyond caffeine alone remains unclear. Most studies are short-term, underpowered, and sponsored by ketone manufacturers.
Exogenous ketones (typically beta-hydroxybutyrate or ketone salts) provide an alternative fuel source that bypasses glucose metabolism, raising blood ketone levels acutely. Caffeine blocks adenosine receptors, increasing alertness and reducing perceived fatigue. Together, they aim to enhance mental clarity, sustained energy, and fat oxidation without the metabolic adaptation of endogenous ketone production from carbohydrate restriction.
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Observational
“BACKGROUND: Exogenous ketone supplementation acutely elevates circulating beta-hydroxybutyrate (R-BHB), but the impact of chronic repeated dosing on exercise performance, cognition, mood, and cardiometabolic health remains unclear.”
“PURPOSE: Ingestion of exogenous ketones alters the metabolic response to exercise and may improve exercise performance, but it has not been explored in variable-intensity team sport activity, or for effects on cognitive function.”
“INTRODUCTION: Special Operations Forces (SOF) often conduct operations in physiologically stressful environments such as severe heat, cold, or hypoxia, which can induce decreases in a variety of cognitive abilities.”
“Coingestion of ketone salts, caffeine and the amino acids, taurine, and leucine improves endurance exercise performance.”
No large RCT has compared exogenous ketones + caffeine to caffeine alone in a blinded design. Ketone-only studies (without caffeine) show mixed results on cognition and endurance, with some trials showing no benefit over placebo. The acute ketone elevation does not replicate the metabolic state of nutritional ketosis (sustained low carbohydrate intake). Gastrointestinal distress is common. Long-term safety and efficacy data are absent.
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