Hydrogen-Rich Water and Resting Metabolism in Young Adults

Participants in this arm will consume a single 250 mL dose of hydrogen-rich water containing approximately 1.6-2.0 ppm of dissolved molecular hydrogen (H₂), The HRW will be ingested following an overnight fast, and resting metabolism will be measured approximately 30-60 minutes post-consumption using indirect calorimetry.

Non-hydrogen-producing tablets, identical in appearance and taste to the active supplement