The short answer. There isn't much data on Nandrolone Decanoate yet — 6 mentions, 3 with a clear outcome — so treat these numbers as anecdotal. It is well studied — 7 meta-analyses on PubMed.
From 6 mentions in total — the rest didn't say how it went and aren't counted.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: Conclusions: Based on the result of our study, the most common adverse effects secondary to the abuse of nandrolone decanoate (ND) involve the endocrine, cardiovascular, skin, and psychiatric systems. These data could prove useful to healthcare professionals in both sports and clinical settings.
PubMed 33187340 ↗Conclusion: The available evidence is insufficient to draw conclusions on the effects, primarily in terms of functional outcome and adverse events, of anabolic steroids, either separately or in combination with nutritional supplements, after surgical treatment of hip fracture in older people. Given that the available data points to the potential for more promising outcomes with a combined anabolic steroid and nutritional supplement intervention, we suggest that future research should focus on evaluating this combination.
PubMed 25284341 ↗Conclusion: We found insufficient evidence to confirm that use of androgens for adults with CKD-related anaemia is beneficial.
PubMed 25300168 ↗Conclusion: Although nandrolone decanoate modestly increases LST, this was not accompanied by improvements in handgrip strength or consistently observed improvements in BMD, and functional outcomes were informed by limited trial data. Taken together, these findings do not support routine clinical use of nandrolone decanoate for improving musculoskeletal health. Given its limited benefit and known safety concerns, non-pharmacological approaches such as resistance training and nutritional support should remain the preferred strategy for preserving musculoskeletal health.
PubMed 41936385 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
First-hand experiences, quoted verbatim. We show one positive and one negative where both exist.
“I added low dose Decca to my trt. My joints have never felt better.”
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 3, 2026. How we rate