Lifeboat Foundation

• Ketones could super-charge the body in a way that’s unlike any other source of fuel.
• San Francisco-based startup HVMN recently launched a drink made of pure ketone ester to harness its performance-boosting qualities.
• The company partnered with Oxford University to leverage $60 million-worth of scientific research on elite athletes.

The nutrition label on a shot-sized bottle of this clear, odorless liquid defies traditional explanation. It contains 120 calories — roughly the equivalent of a hearty slice of bread — yet it has no fat, no protein, and no carbohydrates.

Those calories instead come from ketones, an ingredient that Geoff Woo, cofounder and CEO of San Francisco-based human performance startup called HVMN (pronounced “human”)to call “the fourth macronutrient.”