Bioavailability refers to the relative amount of drugs absorbed into systemic blood circulation after administration through extravascular route. Pharmacology means that the dosage of the drug can reach systemic circulation, which is the pharmacokinetic feature of the drug. Bioavailability is an important tool of pharmacokinetics, which needs to be considered when calculating the dose of intravenous administration.
Factors affecting bioavailability are:
1, cooking material.
2. Source of raw materials.
3. Chemical forms of nutrients.
4. Interaction with drugs.
5. Mucosal state of digestive tract.