Ultima-Prop, 100 mg

Ultima-Prop 100 mg contains testosterone propionate, a short-acting ester of testosterone. It is an injectable androgen commonly associated with muscle development, strength, recovery, training performance, and androgen replacement. Testosterone propionate releases testosterone after the ester is hydrolyzed in the body, providing a shorter-acting testosterone profile than longer esters.

How it works

Testosterone propionate ultimately increases the availability of testosterone, which binds to androgen receptors and influences processes involved in muscle protein synthesis, nitrogen retention, red-blood-cell production, libido, and development of androgen-dependent characteristics.

The propionate ester provides a relatively short duration of action, which is one reason testosterone propionate is often associated with more frequent administration compared with longer testosterone esters.

Proper Use and Dosage

The listed presentation contains 100 mg of testosterone propionate per mL when supplied as a 100 mg/mL injectable formulation.

For medically indicated testosterone replacement, testosterone propionate dosing varies according to the specific product, indication, patient response, and prescribing instructions. Historical prescribing information has used 50–400 mg every 2–4 weeks, although testosterone propionate’s shorter action means dosing schedules differ from longer-acting testosterone esters.

For a 100 mg/mL presentation:

• 25 mg = 0.25 mL
• 50 mg = 0.5 mL
• 75 mg = 0.75 mL
• 100 mg = 1 mL
• 200 mg = 2 mL

The amounts above are volume conversions for a 100 mg/mL formulation, not a bodybuilding dosing recommendation.

Benefits

Ultima-Prop is particularly suited to research and applications involving androgen activity, testosterone replacement, strength, muscle development, and physical performance.

Key benefits and areas of interest include:

• Provides testosterone activity
• Supports androgen-receptor signaling
• Supports muscle protein synthesis
• Promotes nitrogen-retention pathways
• Supports strength and training performance
• Supports recovery and muscle development
• Contributes to normal libido and androgen-dependent functions
• Provides a shorter-acting testosterone ester
• Allows more flexible adjustment of testosterone exposure
• Convenient 100 mg/mL presentation

Its shorter-acting profile makes testosterone propionate particularly distinctive for those interested in more controllable testosterone exposure compared with longer-acting testosterone esters.

Side Effects

Possible effects include acne, oily skin, changes in libido, mood changes, water retention, increased hematocrit, changes in cholesterol levels, gynecomastia, and suppression of natural testosterone production. Testosterone therapy can also affect fertility and cardiovascular risk factors.