Bioavailability (Illustration: www.hilmersstudios.com/medical) is the journey of how efficiently nutrients from the foods or medicines we consumed travel into our body (systemic circulation) to start taking effect. As we are already aware, intravenous drug administration takes effect almost immediately because it streams directly into the blood stream, whereas taking medicine or food supplements orally take longer time before showing the desired effect. This is due to the fact that it needs to travel through various digestive process. By the time the nutrient or medicine reach the destination, it may have lost most of its effectiveness, or worst, all!
Turmeric is insoluble in water; thus ordinary intake of turmeric in curry, or even eating fresh turmeric daily is not enough to get the nutrients required, for example, to assist in the treatment or to prevent cancer. Only a really large amount of turmeric will do the work but that in turn, sadly causes acid reflux disease.