Dr. Jonathann Kuo, MD
Extension Health | CEO
Dr. Kuo advises on clinical safety, protocol design, and evidence-backed health optimization.
The team behind this product
World-class clinicians and scientists ensuring safety, efficacy, and scientific rigor at every step.
Extension Health | CEO
Dr. Kuo advises on clinical safety, protocol design, and evidence-backed health optimization.
Featured on huberman lab
Health Optimization Expert
Dr. Bakri brings expertise in hormone health, telehealth, and practical optimization protocols.
Dama Health | Co-Founders
Paulina and Elena advise on science-backed women's health education, care standards, and patient-centered experience.
The athletes who chase personal bests for a living
US Olympic Medalist, Swimming
US Olympic Sprinter
Pro Swimmer
EXPLORE THE FULL LINEUP
Yes. Both LONGER+ and STRONGER+ are third-party tested, non-GMO, and free of unnecessary fillers. Every ingredient is dosed at clinically studied levels by our advisory team, led by Dr. Jonathann Kuo, who is double board-certified in Anesthesiology and Interventional Orthopedics. As with any supplement, we recommend consulting your healthcare provider if you have specific medical conditions.
It depends on the formula. STRONGER+ is designed for immediate physical output: many users feel improved endurance and power within the first 1–2 weeks. LONGER+ supports core cellular systems that build benefits gradually, with most users reporting noticeable improvements in energy and resilience within 30–60 days of consistent daily use.
We offer two precision-formulated products targeting different goals. LONGER+ is built for cellular renewal and healthy aging, while STRONGER+ targets physical performance, power, and recovery. Choose one based on your primary goal, or stack both for comprehensive coverage. We also offer a Create Your Formula pathway for fully personalized supplementation.
Absolutely. You can switch between LONGER+ and STRONGER+, stack both, or adjust your subscription at any time; cancel, pause, or change with no hassle. As your goals shift from performance to longevity or vice versa, your formula can shift with you.
Yes. LONGER+ and STRONGER+ are designed to complement a healthy lifestyle and can generally be taken alongside other supplements. They're also specifically formulated to work together as complementary formulas. We recommend consulting your healthcare provider to review your full regimen.
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