It’s somewhat quacky. I’ve come to realize that the main driver of longevity is luck. But I had an old friend nearing 100 in good shape who always said that people with a sunny disposition who can manage the inevitable crises of life live longer. Attia makes some good points but a lot of it is just common sense. I’m 78 and fine and frankly convinced that it’s mainly due to luck plus privilege plus the determination to ignore people’s advice and power through aches and pains. Prioritize strength training, walking at least 5 miles per day, omnivore eating, and fiber. I’ve prioritized fiber now for 50 years based on readings when I was in my late 20s. The worst is processed foods and sugar. Also statins for many of us are wonder drugs.