B12

In that case I could just follow you around and drink your urine. :)
 
Or, you can work it into your diet.

Animal sources with a significant content of vitamin B12 (range among top 20 sources of 50 to 99 µg per 100 grams)[23] include clams, organ meats (especially liver) from lamb, veal, beef, and turkey, fish eggs, mackerel, and crab meat.[2][3]

Of course, that doesn't help if you're vegan.
 
There are no naturally occurring B12 pills in Nature...huh.
 
well, vegans just take their b12 in pill form.

which still come from animals . . .

Only if bacteria count.

Vitamin B12, also called cobalamin, is a water-soluble vitamin that has a key role in the normal functioning of the brain and nervous system, and the formation of red blood cells. It is one of eight B vitamins. It is involved in the metabolism of every cell of the human body, especially affecting DNA synthesis, fatty acid and amino acid metabolism.[1] No fungi, plants, or animals (including humans) are capable of producing vitamin B12. Only bacteria and archaea have the enzymes needed for its synthesis. Some substantial sources of B12 include animal products (shellfish, meat), fortified food products, and dietary supplements.[2][3] B12 is the largest and most structurally complicated vitamin and can be produced industrially only through bacterial fermentation synthesis, typically used to manufacture B12 for fortified foods and supplements.
 
I'd probably get better results from a package of Sweet Tarts.
 
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