A compound your body makes naturally in the Krebs cycle, the process every cell uses to convert what you eat into energy. Production starts declining around 40, and by 80 your natural levels sit at roughly 10% of what they were, diet alone can't close that gap. In a clinical study, 1,000mg daily for about seven months was linked to an average 8-year reduction in biological age, measured by DNA methylation testing, a lab test that reads how old your cells actually are, not your birth certificate. A lab result, not a claim on a label.

Same standard as the rest of our lineup. Grown at roughly 1,700 meters in Bolivia's Yungas, where cold air slows ripening and builds more natural sugar and depth into the bean. Every batch is scored by a licensed Q Grader, the coffee world's version of a certified sommelier, on a 100-point scale, and 1775 comes in at 85 or above, the top tier of specialty coffee globally. Ca-AKG and mushrooms are added to a genuinely great cup, not used to distract from a mediocre one.

No. Both run on the same specialty-grade, single-origin beans as everything else we sell. Neither tastes like a supplement because neither compromises the coffee to deliver the function.

No. Lion's Mane, Cordyceps, Reishi, Chaga, and Turkey Tail are functional mushrooms studied for focus and resilience, not the psychoactive kind. Real compounds, studied for centuries, brewed into real coffee.

Two cups a day gets you the full 1g Ca-AKG dose Rejuvenate is built around. This works cumulatively, the clinical result came from consistent daily use over roughly seven months, not one cup. Give it the same time the study did.

No. Your two Rejuvenate bags ship together upfront, then refills continue every 30 days. Vitality, the frother, and the mug are yours outright. Skip a shipment, push the date, or cancel outright, all in your portal.

Yes. Certified organic, then hand-sorted, bean by bean, by local women in Bolivia under UV light, where mold and defects invisible to the naked eye show up as bright white dots and get pulled before roasting. They're called palliris, Aymara for "she who selects," and they've done this work for generations. Every batch also gets lab-tested for mold and pesticides.

Then you don't pay for it. Thirty-day money-back guarantee, no interrogation. We're betting on the coffee, and on the science behind it.