Top 5 Injectable Steroids for Mass in 2025 (Ranked by Strength & Size)

If your goal is to pack on serious mass, strength, and size, injectable steroids are king. While orals can give you quick results, the longer half-lives, smoother gains, and reduced liver stress make injectables the go-to choice for mass-building cycles.

In this 2025 guide, we rank the top 5 injectable steroids for mass, based on muscle volume, strength, water retention, and overall user feedback.

---

💉 1. Testosterone Enanthate or Cypionate

✅ Why it ranks #1:

• Forms the foundation of most bulking cycles
• Promotes protein synthesis, strength, libido, and recovery
• Affordable and widely available
• Typical dose: 400–600 mg/week

💡 Expect 10–20 lbs of mass with proper diet and training.

---

💉 2. Trenbolone Enanthate or Acetate

✅ Why it ranks #2:

• Insane strength and hard, dense muscle
• Zero estrogen conversion (dry gains)
• Boosts aggression and intensity in training
• Typical dose: 200–400 mg/week

⚠️ Not for beginners — can cause insomnia, anxiety, or night sweats.

---

💉 3. Deca-Durabolin (Nandrolone Decanoate)

✅ Why it ranks #3:

• Adds massive size and joint support
• Works synergistically with Test
• Water retention gives that “big” look
• Typical dose: 300–600 mg/week

💡 Best stacked with testosterone to prevent libido issues (Deca dick).

---

💉 4. Equipoise (Boldenone Undecylenate)

✅ Why it ranks #4:

• Builds lean, slow, and high-quality muscle
• Increases appetite significantly
• Boosts red blood cell production for endurance
• Typical dose: 400–600 mg/week

🧠 Ideal for long bulking cycles (12+ weeks).

---

💉 5. Sustanon 250 (Testosterone Blend)

✅ Why it ranks #5:

• Mix of 4 testosterone esters for stable levels
• Great for users who prefer less frequent injections
• Strong mass builder with classic androgenic profile
• Typical dose: 250–750 mg/week

💡 Versatile enough for both bulking and TRT-level use.

---

💡 Pro Tips for Injectable Mass Cycles

• Use an AI like Arimidex to control estrogen
• Track calories — you can’t grow big without eating big
• Pin consistently (every 3.5 days for Test E/C, EOD for Tren A)
• Liver support isn’t needed for injectables, but bloodwork is a must

---

🚫 What to Avoid as a Beginner

• Too many compounds in one cycle
• Overdosing Tren or Deca early on
• Skipping post-cycle therapy (PCT)