Essentials: The Biology of Slowing & Reversing Aging | Dr. David Sinclair

About this video

Dr. David Sinclair argues that aging should be treated as a disease rather than an inevitable backdrop, contending that aging is the major underlying cause of diseases such as heart disease and Alzheimer’s, and that reversing tissue age can make those diseases recede. He frames aging as a loss of information, centered on the epigenome: the system that determines which genes are expressed, analogous to copies degrading over time. Sinclair discusses longevity pathways including sirtuins and how they interact, and describes fasting practices he recommends and follows, such as skipping a meal a day and occasional longer fasts, explaining how low blood glucose and autophagy systems, including a deeper chaperone-mediated autophagy, clear old and misfolded proteins. He also presents mouse research from his field in which NMN, described as fuel for the sirtuins, restored fertility in older female mice.

Key takeaways

• Sinclair argues aging is the major cause of diseases such as heart disease and Alzheimer’s.
• Sinclair frames aging as loss of epigenetic information in the cell.
• Sinclair describes skipping a meal a day and occasional longer fasts as longevity practices.
• Sinclair explains autophagy as a cleansing system that removes old and misfolded proteins during fasting.
• Sinclair presents mouse work in which NMN restored fertility in older females.

Episode details: published October 30, 2025 · 257.6K views · 34:00 long. Summary written by Self Growth Videos from the episode itself. The science and protocols described are Andrew Huberman’s, presented for education — not medical advice. Consult a qualified professional before changing your own health practices.

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