Testosterone is a steroid sex hormone found in both men and women. In men, testosterone is produced primarily by the Leydig (interstitial) cells of the testes when stimulated by luteinizing hormone (LH). It functions to stimulate spermatogenesis, promote physical and functional maturation of spermatozoa, maintain accessory organs of the male reproductive tract, support development of secondary sexual characteristics, stimulate growth and metabolism throughout the body and influence brain development by stimulating sexual behaviors and sexual drive. In women, testosterone is produced by the ovaries (25%), adrenals (25%) and via peripheral conversion from androstenedione (50%). Testerone in women functions to maintain libido and general wellbeing. Testosterone exerts a negative feedback mechanism on pituitary release of LH and follicle-stimulating hormone (FSH). Testosterone may be further converted to dihydrotestosterone or estradiol depending on the tissue. The effects of testosterone in humans and other vertebrates occur by way of two main mechanisms: by activation of the androgen receptor (directly or as DHT), and by conversion to estradiol and activation of certain estrogen receptors. Free testosterone (T) is transported into the cytoplasm of target tissue cells, where it can bind to the androgen receptor, or can be reduced to 5α-dihydrotestosterone (DHT) by the cytoplasmic enzyme 5α-reductase. DHT binds to the same androgen receptor even more strongly than T, so that its androgenic potency is about 2.5 times that of T. The T-receptor or DHT-receptor complex undergoes a structural change that allows it to move into the cell nucleus and bind directly to specific nucleotide sequences of the chromosomal DNA. The areas of binding are called hormone response elements (HREs), and influence transcriptional activity of certain genes, producing the androgen effects. Testosterone is used as hormone replacement or substitution of diminished or absent endogenous testosterone. Use in males: For management of congenital or acquired hypogonadism, hypogonadism associated with HIV infection, and male climacteric (andopause). Use in females: For palliative treatment of androgen-responsive, advanced, inoperable, metastatis (skeletal) carcinoma of the breast in women who are 1-5 years postmenopausal; testosterone esters may be used in combination with estrogens in the management of moderate to severe vasomotor symptoms associated with menopause in women who do not respond to adequately to estrogen therapy alone.

Oxogestone phenpropionate, a progestin that was developed as an injectable hormonal contraceptive; however, was never marketed.

There is no much available information in the literature around nandrolone cyclohexanecarboxylate (brand name Nor-Durandron, Norlongandron). It is known, that this compound is a synthetic androgen and anabolic steroid, which belongs to the strong acting chemical compounds.

Nandrolone hexyloxyphenylpropionate (brand names Anador, Anadur, Anadurine) is a synthetic androgen and anabolic steroid is marketed in some countries. Nandrolone, in general, is more anabolic than testosterone and has a very low androgenic expression. It is reported to have an anabolic to androgenic ratio of 37:125. Typically, males would take a dosage range of 200-600mg/wk with higher doses sometimes found in more advanced users. This compound normally would not be recommended for women due to the virilization effects this compound may cause such as increased body hair, deepened voice. Anadur has a high affinity towards the androgen receptor while having a lower androgenic expression, it is usually not recommended to be taken without testosterone. Without a high androgenic expression and having a strong bond to the AR, side effects of low testosterone are possible such as the infamous "Deca-Dick" (impotence), lethargy, and low sex drive.

Nandrolone cyclohexylpropionate (a derivative of Nandrolone, which is approved by FDA) is an anabolic steroid. Nandrolone cyclohexylpropionate is reported as an ingredient of Sanabolicum in Austria. Sanabolicum is a rarely found version of the anabolic androgenic steroid nandrolone, with a CycloHexylPropionate ester. This modification makes nandrolone more anabolic (muscle building) and less androgenic. Nandrolone cyclohexylpropionate is an androgen receptor agonist.