Looking for something else, I happened across this mention of a pre-WW2 product for pernicious anaemia. Thought I'd post as a matter of possible interest.
The Lancet The London Medical Exhibition October 20, 1934
THE LONDON MEDICAL EXHIBITION
Drugs and Pharmaceutical Preparations
ALLEN AND HANBURYS, LTD. (Bethnal Green, E.), had a wide range of preparations, notably Ferrodic, chocolate-flavoured ferrous phosphate containing 1.75 per cent. of iron (Fe) in the ferrous state ; Hepol, sterilised solution of liver extract for parenteral injection, each c.cm. containing the anti-anaemic principles of 20 g. of fresh liver ; Eugastrol, a desiccated gastric substance for pernicious anaemia ;and Sclerosol S.M., a solution of sodium morrhuate for varicose veins which keeps and does not congeal at ordinary temperatures.
sciencedirect.com/sdfe/pdf/...
There is the following paragraph and some other discussion of PA in this document:
From 1929 Allen & Hanbury’s produced Eugastrol, a form of desiccated Hog stomach for treating pernicious anaemia. Between 1930 1931 there were also several published reports of success in the treatment of pernicious anaemia by liver extracts, as well as Hog’s stomach.