PRIME MASS STACK is all about lean bulk with endurance, appetite support, joint comfort, and gradual size increases that actually stick. This stack shines when calories are controlled and training is consistent. It rewards patience. This becomes your high end lean bulk option the stack for people who care how they look during the bulk, not just after.

The Stack package includes:

3 vials Testosterone Enanthate
2 vials Boldenone Undecylenate (EQ)
2 vials Nandrolone Phenylpropionate (NPP)

Testosterone Enanthate holds the base steady and predictable. Boldenone Undecylenate EQ drives appetite, endurance, and gradual size perfect for longer lean bulks where training volume stays high. Nandrolone Phenylpropionate (NPP) for the performance and recovery compound, supporting joints, improving training tolerance, and allowing heavier loads and more volume without beating the body into the ground.

CYCLE LENGTH:

16 weeks total:

• Testosterone Enanthate, Boldenone Undecylenate (EQ) are long esters
• EQ needs time to fully come online
• NPP provides early and mid cycle recovery support

Weeks 1–4: Foundations building
Weeks 5–8: Appetite, endurance, volume increase
Weeks 9–12: Visible lean mass accumulation
Weeks 13–16: Density, fullness, polish

COMPOUNDS & DOSAGES:

–Testosterone Enanthate (Base)
Dose: 400 mg per week
Purpose:
– Stable hormonal base
– Strength, recovery, libido support
– Keeps everything predictable and controllable

–Boldenone Undecylenate (EQ)
Dose: 500 mg per week
Purpose:
– Appetite enhancement
– Increased endurance and work capacity
– Gradual, keepable muscle gain
– Synergizes beautifully with higher training volume

– Nandrolone Phenylpropionate (NPP)
Dose: 300 mg per week
Purpose:
– Joint and connective tissue support
– Improved recovery between sessions
– Allows heavier weights and higher volume
– Adds thickness without excessive water
– NPP trades cosmetic polish for durability and output.

ESTROGEN (E2) MANAGEMENT:
Optional AI:
Anastrozole: 0.25 mg, 1–2× per week as needed
Only introduce if symptoms appear:
– Excess water retention
– Sensitive nipples
– Mood instability

PROLACTIN MANAGEMENT:
NPP does not aromatize, but it can elevate prolactin.
Optional safeguard:
Cabergoline: 0.25 mg, 1× per week

HEMATOCRIT & BLOOD THICKNESS:
– EQ is notorious for increasing red blood cells.
– Strongly recommended safeguards:
– Routine blood pressure checks
– Hydration and electrolytes daily