Two specific resveratrol forms, Bioforte and Transmax resveratrol, have become the default choice of the medical research community in its investigations of this compound due to their consistent performance in clinical trials. Bioforte and Transmax have been the active ingredient used in medical school studies done in the UK, the US, Canada, Australia, Europe and Asia. One of the explanations for the singularly impressive results from these two resveratrol forms is that the generic form of the compound suffers from two disadvantages as a supplement.  First, its bioavailability, as with most phytochemicals, is low, therefore a means of improving this property is needed to insure assimilation and utilisation by the body.  This is accomplished in Bioforte and Transmax by a proprietary technology which sustains the release of the resveratrol over a longer period in the blood plasma, without sacrificing the valuable metabolites.  Second, resveratrol is subject to rapid disintegration when exposed to ambient oxygen and ultraviolet B radiation.  Biotivia overcomes these problems by placing a patented oxygen absorbing sachet in each bottle of Bioforte and Transmax, and by using special polymers in its packaging that block UVB from reaching the resveratrol inside.