Boldenone Undecylenate vs Nandrolone
Boldenone Undecylenate and Nandrolone are compared here on the things that actually differ between them: what class each belongs to, what each acts on, how each is supplied and what each costs per milligram. Where the registry has no figure for one of them the row is left out rather than filled in.
Side by side
| Boldenone Undecylenate | Nandrolone | |
|---|---|---|
| Class | Anabolic-androgenic steroid | 19-nor anabolic-androgenic steroid |
| Acts on | A 1-dehydro derivative of testosterone. Aromatises, though at a lower rate than testosterone in published comparisons. | A 19-nortestosterone derivative. Reduced to dihydronandrolone rather than DHT in 5-alpha-reductase target tissues, giving a different androgenic profile to testosterone. Progestogenic activity is a documented feature of the 19-nor class. |
| Supplied as | Oil solution with a long undecylenate ester. | Oil solution. Supplied as decanoate (long ester) or phenylpropionate (short ester, NPP). |
| Half-life | Long; approximately 14 days. | Decanoate approximately 6 to 7 days; phenylpropionate roughly 2 to 3 days. |
| Storage | Room temperature, out of direct light. | Room temperature, out of direct light. |
| Listings | 1 | 2 |
| Price from | £38 | £29 |
What actually differs
The clearest difference is class: Boldenone Undecylenate is an Anabolic-androgenic steroid, Nandrolone is a 19-nor anabolic-androgenic steroid. They are not supplied the same way. Boldenone Undecylenate comes as an oil solution with a long undecylenate ester, Nandrolone as an oil solution. Supplied as decanoate (long ester) or phenylpropionate (short ester, NPP). Half-life differs as well: Long; approximately 14 days for Boldenone Undecylenate against Decanoate approximately 6 to 7 days; phenylpropionate roughly 2 to 3 days for Nandrolone.
Quanta Pharma Boldenone Undecylenate (EQ)in stock£38
Quanta Pharma NPP (Nandrolone Phenylpropionate)in stock£29
Quanta Pharma Nandrolone Decanoateout of stock£42
Availability checked 2026-09-09. The product page carries live stock.