I think it goes a bit beyond that... I mean, I think the nutrition related to fat soluble vitamins heavily correlates to the quality/types of fats taken in. Th

I think it goes a bit beyond that... I mean, I think the nutrition related to fat soluble vitamins heavily correlates to the quality/types of fats taken in. There's a lot more nutrition in animal sources of fatty acids than in typical seed oils and the distribution model is very different as well. Since these are used for cellular and hormone generation, I think the "low fat" craze and anti saturated fat and anti dietary cholesterol combined with a general religious approach to veganism has lead to some generational declines. I'm of a pretty firm belief that the typical healthy person should probably be getting around 40% of their nutrition from animal sources, and not in particular be afraid of natural fats nearly as much as refined foods in general. It only took a couple generations of domesticated cats to show the decline from dietary changes, I think it's just taken a bit longer for industrial "food" to start showing the extent of issues in the general western populations. Supplementation helps, but the supplements need to be the actual variations the body absorbs, not precursors that are typically used. In the end, I think the base causes of ED and sexual dysfunction is largely simply the same as mental health in general with age, along with metabolic and cardiovascular issues generally speaking. Too much refined sugar, fructose and low quality protein and fats across generations.