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Steroid modulation of the GABAA receptor complex: electrophysiological studies

The gut may have problems with absorbing certain vitamins and minerals, perhaps due to a condition or illness such as Pernicious Anaemia, Crohns and Coeliac disease

Vitamin B12 deficiency is most likely to develop in animals with reduced cobalamin absorption due to gastrointestinal disease and in dogs with pancreatic enzyme insufficiency (which is more common in certain breeds)

For reference, proteins are long chains of amino acids, typically consisting of 100+ amino acids

RogneTTielemansMJChongMFYajnikCSKrishnaveniGVPostonLet al

Peptide bonds are susceptible to cleavage in the presence of water, particularly at elevated temperatures