1. Eat Lots of Plants and Animals
2. Avoid Poisonous Things
3. Move Frequently at a Slow Pace
4. Lift Heavy Things
5. Sprint Once in a While
6. Get Adequate Sleep
8. Get Adequate Sunlight
9. Avoid Stupid Mistakes
10. Use Your Brain
Personally, I'm fine with eating mostly meat and vegetables, but that doesn't work for everybody. A lot of them decided to use their brains and found out that adding in dairy, eating more fruit and potatoes, researching resistant starches, looking at Ray Peat's ideas, etc. helped them to reach their personal goals. Good for them.
Anyway, I think #2 is probably the most important of them to learn. Grains and seed oils do so much harm, and probably 99+% of the people here agree on that.
In matters of style, swim with the current. In matters of principle, stand like a rock.
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