In summary, unlike oral dietary supplements, vitamin injections contain the highest quality ingredients at the correct potencies without fillers or contaminants. Following administration, the active ingredients are completely absorbed by the body and do not undergo first-pass metabolism. The nutrients are immediately available for utilization to correct nutritional deficiencies. Because of the depot effect and the fact that more of the nutrients reach target tissues, vitamin injections require less frequent dosing than oral supplements.
Knowledge of how to give cattle injections or shots, be it sub-subcutaneously (SQ; under the skin), intramuscularly (IM; directly into the blood supply of the muscle), or intravenously (IV; directly into the vein, usually the jugular vein), is very important in order to be able to vaccinate or treat cattle with vaccines or medicines, respectively. A cow, bull, heifer, steer or calf does not have to be sick in order to be given an injection, many cattle that are perfect healthy are required to get injections or shots for annual vaccinations or booster shots.