Reduction to absurdity.

Vegans generally have broad deficiencies in key macro and micro nutrients.

EPA and DHA, long chain essential omega-3s. You need to eat some fatty fish for this. Algae oil is not the same.

You don't get to enjoy the marrow the collagen the joints full of glucosamine and chondroitin but you can buy supplements for all that.

Are supplements as good as getting it from a healthy food source? Absolutely not.

I think you can play God with your body and see how that fucking around will guarantee you're going to find out.