Does blood sample handling and processing affect levels of vitamin A, E, and D?

Proper handling of blood samples is critical for the most accurate results. Knowledge of which factors affect blood samples leads to a practical and efficient system of handling these samples. This study evaluated the effect of light, temperature, or type of blood collection tube on 25(OH) vitamin D, retinol, and alpha-tocopherol in lion blood samples. Blood samples were collected from...

You can’t get blood from a stone, but you need to get it somewhere- vampire bat (Desmondus rotundus) feeding logistics

The beef blood collection procedures for three AZA zoological institutions to feed Desmodus rotundus are reviewed. Blood collected for the Philadelphia Zoo is done at slaughter and an anticoagulant is added. Blood collected for the Cincinnati Zoo is also done at slaughter but no anticoagulant is added and blood collected for the Brookfield Zoo is taken from live animals within...