NPP 100

NPP 100 is nandrolone phenylpropionate, an injectable anabolic steroid dosed at 100 mg per ml. It carries a short phenylpropionate ester, so it releases and clears faster than the longer decanoate ester found in Deca-Durabolin. Users choose it for lean muscle gains, improved recovery, and joint comfort with comparatively mild water retention.

Because of the short ester, NPP needs more frequent injections than Deca, usually split into two doses per week rather than one. A common beginner-level range is around 300 mg per week, for example 150 mg on Monday and 150 mg on Thursday, run for 8 to 10 weeks. This is general dosing information, not a personal medical recommendation, and any cycle should be planned with your own health history in mind.

Yes. Nandrolone suppresses natural testosterone production on its own, so a testosterone base of roughly 150 to 200 mg per week is used to maintain normal physiological hormone levels through the cycle. Running NPP without any testosterone support is a common mistake that leads to low-testosterone symptoms partway through.

NPP can lower HDL cholesterol, raise blood pressure, and in some users cause progesterone-related effects such as mood changes or reduced libido, alongside the expected suppression of natural testosterone. Baseline bloodwork covering testosterone, oestradiol, lipids and liver markers before starting, with a follow-up mid-cycle and again a few weeks after finishing, helps catch problems early. A full PCT protocol, such as nolvadex or clomid, should begin a few days after the last injection.

Both are nandrolone, so the muscle-building and joint-relief effects are similar, but the ester length changes how the compound is used. Deca's decanoate ester clears slowly and suits once-weekly injections with a longer detection window, while NPP's phenylpropionate ester needs twice-weekly injections but leaves the body faster, which some users prefer for easing into a first nandrolone cycle or managing side effects more responsively.

Every box of Proper Labs NPP sold on Steroids UK carries a verification check-code you can confirm is genuine stock before use. Orders ship from our UK warehouse via Royal Mail Tracked 24 in plain, discreet packaging, with same-day dispatch when payment clears before noon on a working day. Most UK orders arrive within 1 to 2 working days.