Hyper Pharma NPP 100mg

Hyper Pharma NPP (Nandrolone Phenylpropionate) 100mg/ml is the fast-acting version of Deca-Durabolin, delivering identical muscle-building and joint-protective benefits but with a shorter ester that provides quicker onset, faster side-effect resolution, and significantly easier PCT timing. Nandrolone has an anabolic rating of 125 and androgenic rating of just 37, making it one of the most favourable anabolic-to-androgenic ratio compounds available. It builds quality, dense muscle with less water retention and fewer androgenic side effects than equivalent doses of testosterone.

NPP vs Deca: Why the Short Ester Matters

The compound itself (Nandrolone) is identical in both products. The difference is the ester, which controls release speed:

• NPP (this product): half-life 2.5-4 days. Effects noticeable within 1-2 weeks. Clears system in 5-7 days. PCT begins 5-7 days after last injection. If side effects occur, they resolve within days of discontinuation
• Deca-Durabolin (Decanoate): half-life 15 days. Effects take 4-6 weeks to appear. Takes 21+ days to clear. PCT delayed by 3 weeks. Side effects persist for weeks after stopping

NPP is the preferred choice for first-time Nandrolone users because if you discover you do not tolerate the compound well (prolactin issues, mood changes, erectile dysfunction), you can stop and the compound clears within days rather than lingering for weeks.

The Joint Benefit

Nandrolone increases collagen synthesis by up to 250% and improves synovial fluid production. Users running heavy compound lifts consistently report that joint pain diminishes or disappears during Nandrolone cycles. This makes NPP valuable not just for mass building but as joint support during heavy training phases with dry compounds like Winstrol (which reduces synovial fluid and causes joint dryness).

Suggested Protocol

• Dose: 300-400mg per week (100mg every other day or 150mg 3x per week)
• Cycle length: 10-14 weeks
• Testosterone base required: Test E 300-500mg/week. Never run Nandrolone without testosterone
• Prolactin control: Cabergoline 0.25mg twice per week (mandatory for 19-nor compounds)
• PCT start: 5-7 days after last NPP injection
• PCT: Nolvadex 40/40/20/20mg for 4 weeks

Key Facts

• Active ingredient: Nandrolone Phenylpropionate 100mg/ml
• Manufacturer: Hyper Pharma
• Anabolic / Androgenic: 125 / 37
• Half-life: 2.5-4 days
• Aromatisation: low (approximately 20% the rate of testosterone)
• Progestogenic: yes (raises prolactin, Cabergoline required)
• Liver toxicity: none (injectable)

Also available: Adelphi Research NPP 100mg. For PCT protocols specific to Nandrolone, see our PCT Guide. Browse all injectable steroids.