Let’s say I have a population of 100 people, and let’s say two of them get heart disease from a genetic risk of heart disease from low vitamin D, and the other

Let’s say I have a population of 100 people, and let’s say two of them get heart disease from a genetic risk of heart disease from low vitamin D, and the other 98 of them get heart attacks from any of the other numerous causes of heart disease. You could give vitamin D to all those 100 people and vitamin D would appear to do nothing. Unless of course she one of the two people that it did work for. So can you see how these randomized controlled trials of nutritional supplementation’s are useless for any individual? I don’t care how vitamin D affect a population, I care how it affects me.