Exogenous ketones are ketone bodies introduced from outside the body. The most common forms you’ll see are beta-hydroxybutyrate (BHB) in ketone salts and in ketone esters. When you take a supplement, it can elevate the level of ketones in the bloodstream, providing an additional fuel source that is independent of carbohydrate intake. This page focuses on understanding what exogenous ketones are, how they work, and practical considerations for dosing and daily use. In terms of how they work, exogenous ketones enter the bloodstream after ingestion and become available for transport to various tissues. They can serve as an alternate energy substrate and contribute to the existing pool of circulating ketones. By increasing circulating ketone levels, exogenous ketones may influence how energy substrates are utilized during daily activities, without requiring selective dietary changes. The details of metabolic response can vary from person to person, and your experience may depend on factors such as formulation and timing. Proper dosing for exogenous ketones varies by product and formulation. It’s common to start with a smaller portion to gauge tolerance, then adjust based on personal response. For ketone salts, typical serving ranges are around 5–12 grams per serving, while ketone esters may have higher per-serving amounts, often in the 10–25 gram range. Always follow the label instructions from the specific product you’re using, and consider starting with a half-serving to assess how you respond before increasing. Flavor, texture, and overall palatability can also influence your dosing choice. Practical tips for incorporating exogenous ketones into your day include planning dose timing around your routine, staying well hydrated, and keeping a simple log of when you take them and how you feel to understand your personal response. If you prefer a certain form—salt or ester—consider how it fits into your daily workflow and taste preferences. Proper storage and adherence to product directions help maintain quality. By tailoring use to your routine and keeping notes, you can integrate exogenous ketones in a way that aligns with your day-to-day plan.

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