The only relevant math I need is that humans have done fine with animal fats for thousands of years. The value I need is what I can get naturally.
And BTW, I have dark skin, I live in one of the Northest parts of the world humans live, haven't taken vitamin D supplements in years and my vitamin D levels have been great (upper middle of whatever acceptable range they use) when I got tested several times over the past years. I don't even care anymore. I will continue to eat what humans are supposed to eat and I'll be fine.
Even if your numbers are not good, you should not be eating these chemicals in isolation. We don't need nutrients, we need food.
Nutrient-nutrient interaction is very difficult to study, but it has been found to be crucial every time they've managed to do it.
And BTW, I have dark skin, I live in one of the Northest parts of the world humans live, haven't taken vitamin D supplements in years and my vitamin D levels have been great (upper middle of whatever acceptable range they use) when I got tested several times over the past years. I don't even care anymore. I will continue to eat what humans are supposed to eat and I'll be fine.
Even if your numbers are not good, you should not be eating these chemicals in isolation. We don't need nutrients, we need food.
Nutrient-nutrient interaction is very difficult to study, but it has been found to be crucial every time they've managed to do it.