Guinea pig nutrition — dietary vitamin C requirement (no endogenous synthesis)
Verbatim first-hand facts from Merck Veterinary Manual — Guinea Pigs (saved first-hand text, pdf-raw/exotic-toxicology/guinea-pig.txt). Each bullet is an exact substring of the cited source and C1-substring verified (second-round nutrition broadening, reusing saved Merck source).
Nutritional facts
- Guinea pigs of all ages require a dietary source of vitamin C.