How Exogenous Ketones Work
Exogenous ketones are a supplement form of ketones designed to raise blood ketone levels temporarily. They are often marketed to support mental clarity, energy, and adaptation to a ketogenic diet.
The basics of ketosis
Ketosis is a metabolic state where your body uses ketones—produced from stored fat—as a primary fuel source instead of glucose.
Forms of exogenous ketones
- BHB salts — Beta-hydroxybutyrate bound to minerals.
- Ketone esters — Faster absorption, strong taste.
How they work
When consumed, exogenous ketones raise circulating BHB levels within minutes to an hour, mimicking some effects of nutritional ketosis without the full diet shift.
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Exogenous ketones are ketones supplied from outside the body, often in supplement form. Products like Youtric Keto contain beta-hydroxybutyrate (BHB) salts, which can raise blood ketone levels temporarily. For the metabolic details, see our science of ketosis guide.
Concerned about safety? Read our Are Exogenous Ketones Safe? post for potential risks and considerations.