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. 
Transdermal patches (adhesive patches placed on the skin) may also be used to deliver a steady dose through the skin and into the bloodstream. Testosterone-containing creams and gels that are applied daily to the skin are also available, but absorption is inefficient (roughly 10%, varying between individuals) and these treatments tend to be more expensive. Individuals who are especially physically active and/or bathe often may not be good candidates, since the medication can be washed off and may take up to six hours to be fully absorbed. There is also the risk that an intimate partner or child may come in contact with the application site and inadvertently dose himself or herself; children and women are highly sensitive to testosterone and can suffer unintended masculinization and health effects, even from small doses. Injection is the most common method used by individuals administering AAS for non-medical purposes. 
As a mild steroid, while most men who supplement will use it while dieting they will still need to take a fairly large amount to gain any positive effect. If you supplement with oral Primo you will need even more per week than if you choose injectable and as both are very expensive; as you can guess this cost will add up very fast. Most men who try Primobolan and who are disappointed on the basis of no results are usually found lacking simply because they didn’t take enough; for example, an average man will need approximately 500mg per week of injectable Primo to receive a benefit and he will need to do so for at least 8 weeks . Yes, you can absolutely take more and for a longer period of time but if you do be prepared to feel your wallet get a whole lot lighter.
You may have already guessed, while Primobolan can be used by men if we were to recommend it to anyone it would be the female performance enhancer first; not only because it will be tolerated so well by her but because she will not need nearly as much making it all the more affordable and feasible. Again, injectable Primo will prove to be best but to ensure safety and protection against virilization is in place most women will not want to exceed 6 weeks of use max with 4 weeks of use generally being the minimal time frame. For women who want more they can absolutely run another course but it is advised that 4 weeks of discontinued use be held to before another course begins. For the average woman most will find 100mg per week to be sufficient; you can go higher but the higher you go the greater the risk. You may need to play with the dosing a little bit but 100mg is a good place to start and 2 injections per week of 50mg each is just about perfect.