Adding Medium-Chain Triglyceride (MCT) oil to exogenous ketone supplements (like BHB salts or esters) leads to a higher and more prolonged elevation of blood ketone levels than taking either substance alone. The MCT oil slows the absorption of the supplemental ketones, extending their effect.

The standard 5-gram dose of creatine is effective for muscle performance but insufficient to saturate the brain. To leverage creatine's neuroprotective and cognitive-enhancing effects—such as improved function when sleep-deprived or aging—a higher daily dose of 10 to 15 grams is necessary.

The typical 5-gram dose of creatine primarily saturates the muscles, leaving little for the brain. Since some bioavailability is lost crossing the blood-brain barrier, higher doses (e.g., 20g) are required to achieve significant cognitive and neuroprotective benefits.

The standard 5g daily dose of creatine is mostly absorbed by muscles, especially in active individuals. To achieve cognitive benefits, a higher dose of 10g or more is necessary for the excess to cross the blood-brain barrier and support brain energy production.

Urolithin A, a powerful compound for mitochondrial health, is produced by gut bacteria after eating pomegranates. However, half the population lacks the necessary microbiome to perform this conversion, making direct supplementation the only reliable way to get its benefits.

The popular advice to take magnesium for sleep is often flawed. Most common forms of magnesium (like oxide or citrate) do not cross the blood-brain barrier. Since sleep is a brain process, these supplements are unlikely to have a direct effect unless an individual is clinically deficient.

Urolithin A, a postbiotic that promotes mitochondrial health, is naturally produced from foods like pomegranates. However, individual gut bacteria variability means production differs widely. Direct supplementation provides a more reliable and consistent dose to achieve its benefits.

Constant daily intake of some longevity molecules can have counteracting side effects. For example, taking resveratrol every other day showed a greater lifespan extension in mice than daily intake. Pulsing supplements provides a hormetic stress without constant interference.

While 5g of creatine saturates muscles, the brain only sees significant benefits at higher doses of 10-25g. Muscles are "greedy" and absorb the lower amounts, so to overcome sleep deprivation or achieve cognitive enhancement, a much larger dose is needed for it to reach the brain.