The extent to which an active ingredient is absorbed from a medicine and becomes available in the body.

The percent of dose entering the systemic circulation after administration of a given dosage form. More explicitly, the ratio of the amount of drug “absorbed” from a test formulation to the amount “ab [..]

Extent to which a pesticide residue can be taken up into an organism from the total amount present in its food and environment, and the rate at which this occurs.

n. in pharmacology, refers to the fraction or quantity of a drug administered and made available to the body as well as the rate at which this dose is distributed to target organs and their tissues.

Quantity of an administered drug available to be distributed by the body to the site or organ.

effectiveness (pop)

A measure of the fraction of a drug that enters the systemic blood circulation after oral administration. The usual measure is the ratio of the AUC of two different formulations of the same drug, corrected for dose. If an intravenous injection of 1 mg of a drug gives an AUC of, say, 1000 ng.h/ml, and a 5mg tablet gives an AUC of, say, 3000 ng.h/ml, [..]

The percentage of drug that is detected in the systemic circulation after its administration.

A term to describe how much of a substance gets into the blood through a variety of routes, including the diet. It may refer to vitamins, additives, pesticides or medicines.

The degree of availability to biodegradation of pollutants in contaminated soil or land.(Source: European Commission CUB)

How quickly and completely the body can absorb and use a nutrient.

The extent to which a substance can be absorbed into the tissues of organisms. Possibly the most important factor determining the extent to which a contaminant will enter the food chain and accumulate [..]

Bioavailability is the amount of drug available in the systemic circulation that is able to have an effect on the biological system. A drugs bioavailability is determined by its pharmacokinetics; for [..]

The way that a contaminant is stored in the environment affects how much of it is available, relative to its actual amount, to harm organisms

The percentage of drug that is detected in the systemic circulation after its administration. Losses can be attributed to an inherent lack of absorption/passage into the systemic circulation and/or to [..]

A term used to describe the biological availability of a drug. The bioavailability depends on the absorption, distribution, metabolism, and excretion of the drug. For example, the absorption of the drug depends on the dissolution profile of the dosage form, hence, the importance of dissolution testing in assuring consistent bioavailability.

the fraction of an administered compound that reaches the systemic circulation and is transported to site of action (target tissue).

The extent to which the active ingredient of a drug Dosage Form becomes available at the site of drug action or in a biological medium believed to reflect accessibility to a site of action.

A measure of the rate and extent to which a drug is absorbed and becomes available at the site of drug action in the body. See Related Term(s): Pharmacology

Bioavailability refers to how easy it is for dogs (or humans!) to absorb a nutrient or mineral. A high bioavailability means that it is easily digestible.

The rate and extent to which a drug or dietary supplement is absorbed into general ciruclation, therby permitting access to the site of action. Measured by the concentration in body fluids, usually blood, or by the magnitude of the pharmacological response. Expressed as a fraction of an administered dose.

The fraction of administered drug that reaches the systemic circulation.

The ability of a drug or other chemical to be taken up by the body and made available in the tissue where it is needed.

Degree to which a chemical can be absorbed by and/or interact with an organism.

Degree of ability to be absorbed and ready to interact in organism metabolism.

The rate and extent of availability of an active ingredient from a dosage form as measured by the concentration/time curve in the systemic circulation or its excretion in the urine.

The extent to which an oral medication is absorbed in the digestive tract and reaches the bloodstream

The ability of an ingested nutrient to cross from the digestive tract into the bloodstream and then from the bloodstream into the cells in which it will be utilized.

The proportion of an administered drug that enters general circulation and is available for use by the body. Depending on the drug's method of action and purpose, intramuscular and subcutaneous injections may result in a lower bioavailability of the drug than would an intravenous injection.