What is Sustanon?

Sustanon is an injectable form of testosterone that contains four esters with different release rates: propionate, phenylpropionate, isocaproate, and decanoate.

This combination ensures a smooth and long-lasting release of testosterone into the bloodstream — from the first hours after injection up to three weeks.

Medically, Sustanon is prescribed for male hypogonadism and age-related testosterone decline, helping to normalize libido, mood, bone density, and body composition.

In sports, it is used to promote muscle growth, strength increase, and faster recovery thanks to its anabolic and androgenic properties.

Main effects of Sustanon

💪 Increases muscle mass through enhanced protein synthesis

⚡ Boosts strength, endurance, and overall performance

🔁 Accelerates post-training recovery

🩸 Stimulates red blood cell production and improves tissue oxygenation

🔥 Reduces body fat while preserving lean muscle

❤️ Enhances libido and overall vitality

😌 Improves mood and cognitive function

How to take Sustanon

Instructions for athletes

• Injection frequency: once every 5–7 days
• Injection volume: 1 ml (250 mg) per dose
• Typical cycle duration: 8–10 weeks, followed by post-cycle therapy (PCT)
• Injections should be made deep intramuscularly (commonly into the gluteal muscle) under sterile conditions

Combination use

Sustanon is commonly combined with:

• Nandrolone decanoate or boldenone undecylenate – for bulking cycles
• Stanozolol or drostanolone – for cutting and improving muscle definition
• Aromatase inhibitors (e.g., anastrozole) – to control estradiol levels
• Post-cycle therapy agents (clomiphene, tamoxifen) – to restore natural testosterone production

Precautions

• Use only after confirming low testosterone levels
• Monitor estradiol, hematocrit, lipid profile, and liver enzymes regularly
• Do not exceed recommended dosages
• Avoid combining with other injectable androgens without professional guidance

Side effects

• Water retention and increased blood pressure
• Acne and oily skin
• Hair loss (androgenic alopecia)
• Increased irritability or aggression
• Suppression of natural testosterone production
• Possible gynecomastia if estradiol levels rise

Storage

• Store in a dry, dark place at 15–25 °C
• Do not freeze or expose to heat
• Keep away from moisture and children

How does Sustanon work?

Testosterone from Sustanon binds to androgen receptors in muscle and other tissues, activating genes responsible for protein synthesis and cell regeneration.

A portion of testosterone converts into dihydrotestosterone (DHT) — a more potent androgen that enhances muscle density, strength, and libido.

Another part undergoes aromatization to estradiol, which requires monitoring to prevent estrogen-related side effects.

Thanks to its ester blend:

• Propionate acts quickly (1–2 days),
• Phenylpropionate and isocaproate provide medium-term release,
• Decanoate maintains stable testosterone levels for 2–3 weeks.

This profile gives Sustanon a rapid onset and prolonged duration, making it suitable for maintaining stable hormonal levels in both medical and athletic contexts.