Testobolin – XR (1000 mg/4 ml) 1 x 4 ml (Alpha Pharma)

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Testobolin – XR 1000 mg/4 ml is injectable Testosterone Undecanoate manufactured by Alpha Pharma. It comes in a package of 1 x 4 ml ampoules.

Testosterone undecanoate was developed to be a safer, oral testosterone alternative to the injectible testosterone that most athletes are familiar with, but there are also injectable versions available.

Muscle gains from using Testobolin – XR alone are very slight. Also, because the Testobolin – XR is only active in the body for several hours, users must take several pills a day to feel the effects of the drug.

Testobolin – XR 1000 mg/4 ml usage

The recommended dose for Testobolin – XR is around 600 mg per day. Testobolin – XR is a very safe, if rather ineffective, steroid to use. Because it only slightly increases testosterone levels in the body, side effects are negligible – even for women.

Testobolin – XR has been known to help erectile dysfunction and is an effective hormone replacement therapy drug for men suffering form low testosterone.

Alpha Pharma Testobolin – XR 1000 mg/4 ml quick facts

  • Chemical Name: androsta-4-en-3-one,17b-ol
  • Testosterone + Undecanoate ester
  • Molecular weight of base: 288.429
  • Molecular weight of ester: 186.2936
  • Formula: C19 H28 O2
  • Melting Point: 155
  • Manufacturer: Alpha Pharma, originally Organon
  • Effective dose: 600mgs
  • Active Life: less than 8-12 hours
  • Detection Time: 4-5 weeks
  • Anabolic/Androgenic Ratio (Range): 100:100

Specification: Testobolin – XR (1000 mg/4 ml) 1 x 4 ml (Alpha Pharma)

Product name

Testobolin – XR


Alpha Pharma

Common name


Effective substance

Testosterone Undecanoate


1000 mg/4 ml


1 x 4 ml ampoules

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