Calcium beta-hydroxybutyrate delivers a ketone salt bound to calcium. People use it to raise blood ketones without cutting carbs or while adapting to a ketogenic diet. The calcium form sidesteps the heavy sodium and potassium loads that come with other ketone salts.
It can sharpen mental clarity and provide steady energy during the shift into ketosis or before a workout. Human studies examining performance, recovery, and body composition effects are thin, so its impact on exercise remains an open question.
Each gram packs a meaningful dose of calcium. Large servings beyond 10 grams can push calcium intake high enough to risk hypercalcemia. Anyone with kidney issues or taking calcium-channel blockers should be cautious.