For the highest BV Anavar should be taken on empty stomach with a glass of slightly acidic water (apple vinegar). No milk, no coffee, no tea. Forget about your oatmeal with fruits, nuts and milk. You should also avoid any diuretics during it’s in the system (excess caffeine) because oxandrolone is mainly metabolised and excreted (unchanged as well) by the kidneys (quite unique in the AAS world). To limit its first pass effect, take supplements/drugs that increase hepatocytes integrity. Pay attention that it raises your free cortisol despite its general anti-GCs, anti-GR properties - being in harmony with the circadian rhythm, the biggest dose should be taken in the morning (a second, smaller dose in the soon afternoon). Taking it directly before a workout is a nonsense.
Many of you guys don’t care about PK and biopharmacy losing full potential of a given drug.