Although I am usually not inclined to posit speculations on why a particular drug does or doesn't do something, in this case I will. Im guessing that the higher doses of Anadrol cause enough appetite suppression (at least anecdotally) to make eating rather difficult. It can also increase insulin resistance and glucose intolerance (5). This has the effect of making macronutrient absorption more inefficient, and could also be a factor in reducing gains when the dosage goes over 100mgs/day. Unfortunately, Anadrol also has a reasonably profound effect on your body's natural hormonal system, on par with most other oral steroids , but not as bad as most injectables, and its certainly not as harsh on your lipid profile as many anabolics are
Steroid isolation , depending on context, is the isolation of chemical matter required for chemical structure elucidation, derivitzation or degradation chemistry, biological testing, and other research needs (generally milligrams to grams, but often more  or the isolation of "analytical quantities" of the substance of interest (where the focus is on identifying and quantifying the substance (for example, in biological tissue or fluid). The amount isolated depends on the analytical method, but is generally less than one microgram.  [ page needed ] The methods of isolation to achieve the two scales of product are distinct, but include extraction , precipitation, adsorption , chromatography , and crystallization . In both cases, the isolated substance is purified to chemical homogeneity; combined separation and analytical methods, such as LC-MS , are chosen to be "orthogonal"—achieving their separations based on distinct modes of interaction between substance and isolating matrix—to detect a single species in the pure sample. Structure determination refers to the methods to determine the chemical structure of an isolated pure steroid, using an evolving array of chemical and physical methods which have included NMR and small-molecule crystallography .  : 10–19 Methods of analysis overlap both of the above areas, emphasizing analytical methods to determining if a steroid is present in a mixture and determining its quantity. 
Oxandrolone is most certainly a hepatotoxic steroid. It does not carry the strongest level of hepatotoxicity among anabolic steroids, but it is stronger than most. This is due to it being a C17-aa anabolic steroid. All C17-aa steroids are hepatic, but the level of toxicity varies greatly between them. Due to this steroid’s strong hepatotoxicity, this is why total use must be limited (see administration section).
Due to use, those who supplement with Anadrol will find their liver enzyme values increase. An increase in values is not a sign of damage but rather a sign of stress that can lead to damage if responsible practices are not followed and the stress is allowed to remain. Proper dosing and duration of use protocols are imperative when it comes to this steroid. Further, it is important the individual avoids excess alcohol consumption when supplementing with this steroid due to the liver stress such consumption will cause. In fact, most will find avoiding all alcohol to be best during use. If this is a problem and you are supplementing for the purpose of performance enhancement remember there is nothing on earth that is as anti-performance as alcohol. Those who supplement are also encouraged to limit their use of Over the Counter (OTC) medications. Many OTC medications carry strong hepatic natures, and the added stress can be extensive when coupled with Anadrol. Use should be limited to when only absolutely needed. If these rules can be followed, once use is discontinued liver enzyme values will return to normal and no damage will be done. As a final note, Anadrol should not be used if the liver is unhealthy.