Explain why insulin needs to be injected into the bloodstream.
Insulin is a hormone transported through blood in the presence of oxygen it will be activated which is available in blood, and also you can get quick result by injecting than oral administration
Insulin is a protein hormone and if it is taken orally it gets digested in our digestive tract and by the time it reaches the target organ it loses its chemical nature and its activity.
Insulin is made up of proteins if taken by mouth is denatured by the digestive process and become inactivate, so it can’t be taken in pill form it must be injected.
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