I would not be concerned with either of those.

All the nutrients you need will be found in fatty meat. If you are concerned about vitamins you could take a multi vitamin. Here is one wife and I take that has a wide range of vitamins as well as some minerals. I don't think we need it but take it "just in case". Or just eat some liver once a week. Eggs are a multi-vitamin and have everything in the yolk to grow a baby chicken. Sardines are good for omega 3 oils if you are concerned with that.

https://www.amazon.com/gp/product/B01N4SJWC0/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1

Meat being hard on kidneys is a myth that I also used to believe.

https://www.youtube.com/watch?v=IjQColM-q44

https://www.youtube.com/results?search_query=dr+ken+berry+keto+kidney+disease

John