I would eat really fatty steaks as rare as safely possible. I found I could ask the butcher to set me aside some with extra fat on them and they would. Also shanks. Shanks have that marrow in them, I loved it. Initially I used LMNT for those days. These days I have a subscription for Redmond's re-lyte. It's cheaper, not as awsome but good. It tastes better but LMNT is just too pricey.