Ok, in the context of commercial supplements being 10-30x the "correct dose" the significant point is that the commercial doses are stupidly high for anyone. People needing +/- 50% of the dose isn't the important part here.
No, some people need more than the commercial supplements provide. That's the point. The effective range varies by an order of magnitude. The author denies the actual variety of human needs.
3mg is not the correct starting dose. If you need to adjust up, fine, but for most people that won’t be required. Starting too high and adjusting down is not the correct approach (a general rule, not just for this drug).
