Testosterone Undecanoate (Nebido/Aveed)
Testosterone 17β-undecanoate. Anabolic Androgenic Steroid (AAS), testosterone ester.
This page describes what Testosterone Undecanoate (Nebido/Aveed) is and its known risks. It is not medical advice and not a guide to using it. Many of these substances are prescription-only or illegal to use without a prescription. Speak to a doctor.
- Class
- Anabolic Androgenic Steroid (AAS)
- Legal status
- Schedule 4 (South Africa) / Schedule III (USA)
- Half-life
- 20-34 days
- Liver strain
- Low
- Kidney strain
- Low-Moderate
- Converts to estrogen
- High
- Suppresses natural hormones
- Yes
Medical uses
- Testosterone Replacement Therapy (TRT)
- Male hypogonadism
What it does in the body
Anabolic
- Increased muscle mass (slow, steady)
- Increased strength
- Enhanced recovery
Androgenic
- Increased libido
- Improved mood
Forms, half-life and detection
| Form | Half-life | Reported detection window |
|---|---|---|
| Injectable (Intramuscular) | 20-34 days | Up to 12 months |
Side effects and health risks
Estrogenic
- Gynecomastia
- Water retention
Androgenic
- Acne
- Hair loss
- Prostate enlargement
Heart and blood vessels
- Increased LDL
- Decreased HDL
- Increased hematocrit
Hormones and fertility
- Suppression of natural testosterone production
- Testicular atrophy
Blood tests worth monitoring
From its known properties, these are the markers doctors commonly check. Getting blood work before, during and after is how problems are caught early.
- Androgens tend to lower HDL, raise LDL and thicken the blood: HDL Cholesterol, LDL Cholesterol, Hematocrit, Hemoglobin
- Aromatisation: High: Estradiol (E2)
- Shuts down natural production (PCT needed): Total Testosterone, LH, FSH
Related compounds
Questions
What is the half-life of Testosterone Undecanoate (Nebido/Aveed)?
About 20-34 days. Half-life is the time for the level in the blood to fall by half.
How long is Testosterone Undecanoate (Nebido/Aveed) detectable?
Testing windows of Up to 12 months are reported, depending on the test and the person.
Is Testosterone Undecanoate (Nebido/Aveed) legal?
Schedule 4 (South Africa) / Schedule III (USA). Laws differ by country and change; check the rules where you live.
What blood tests matter with Testosterone Undecanoate (Nebido/Aveed)?
Based on its properties, these markers are commonly monitored: HDL Cholesterol, LDL Cholesterol, Hematocrit, Hemoglobin, Estradiol (E2), Total Testosterone, LH and FSH. A doctor can order and interpret them.
What are the side effects of Testosterone Undecanoate (Nebido/Aveed)?
Estrogenic: gynecomastia and water retention. Androgenic: acne, hair loss and prostate enlargement. Heart and blood vessels: increased ldl, decreased hdl and increased hematocrit.
For information only, not medical advice. MyoStats is a tracking tool used at your own discretion. Speak to a doctor before changing your training, diet, medication or anything you take.