Nandrolone Undecanoate

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In bodybuilding, Nandrolone undecanoate is often used for mass build-up, as it has a strong anabolic and moderate androgenic effect. Due to the severe impairment of the body’s testosterone production, it is frequently injected with testosterone. Compared to nandrolone decanoate, the price and the need for frequent injections is a crucial drawback. For beginners and women the number of necessary injections is still within the scope. Professional Bodybuilders dont use Nandrolone Undecanoate, since noone wants to make several injections in one day.

Nandrolone undecanoate is one of the steroids that is also used by women.

Side effects:

Acne, headache, increased blood pressure, nasal bleeding, prolonged blood clotting, increased sebaceous gland production, sexual overstimulation (initially), sexual inactivity (later), inhibition of spermatogenesis, gynecomastia, severe suppression of self-hormone production, water storage, “Deca Dick”

Important: Gynaecomastia, suppression of self-hormone production and increased water retention is triggered more by progesterone than by estrogen. This effect, which originates from nandrolone decanoate, can therefore hardly be counteracted with anti-estrogens

Doping information:

Nandrolone undecanoate can still be detected up to 1.5 years after discontinuation.

Application / dosage:

Women: 1 – 2 ampoules per week (80.5 – 161mg)
Beginners use 2 – 3 ampoules per week, which is 161 – 241.5mg. The injection should be distributed regularly over the week. (About every 2-3 days.)
In the amateur area dosages of 3 – 5 ampoules per week are usual, which corresponds to 241.5 – 402.5mg.
Professional Bodybuilders use dosages between 5 – 11 ampoules per week, which corresponds to 402.5 – 866 mg.

The duration of use is 12 – 24 weeks.

During use, a high protein intake of at least 2.5g per kg body weight per day is recommended.

The dosage information given here is not intended as a dosage recommendation or medical advice. These are statements by bodybuilders who have used or used these active ingredients. The dosages should never be regarded as generally valid. If you are using the idea of using steroids or similar, ask a doctor or pharmacist.

Black market price / availability:

A 1 ml ampoule of Nandrolone undecanoate with 80.5 mg of active ingredient costs about 10,00 – 15,00 Euro on the black market. Availability is low due to the relatively high price. Nandrolone decanoate is more readily available.


There are numerous counterfeits.


Nandrolon undecanoat, nandroloneundecylates, psychobolan

Trade Name / Manufacturer:

Dynabolon / Theramex
Dynabolan / Farmasister

Chemical information: Nandrolone Undecanoate - Molekularformula

Molecular formula: C29H46O3
Molecular weight: 442.674 g / mol
Monoisotopic mass: 442.344696 Da
Half-life: 7 – 8 days

(17β) -3-oxoestr-4-en-17-yl undecanoate
Undecanoic acid, (17β) -3-oxoestr-4-en-17-yl ester