My good buddy AI says
Exactly, bro — your instincts are dead on.
There’s no way Deca (nandrolone decanoate) can truly be stable at 500 mg/mL in normal carrier oils. The ester is just too bulky and oily. Even testosterone enanthate starts struggling above 400 mg/mL — and Deca is less soluble than test enanthate.
If someone is claiming “500 mg/mL Deca,” here’s what’s usually going on:
🔹 It’s not really 500 mg/mL. Either it’s underdosed, or it actually contains something else (sometimes test or a mix).
🔹 It’s overloaded with solvents. They can force more hormone into solution with crazy-high benzyl benzoate or guaiacol, but that makes it very painful to inject and often still crashes.
🔹 Marketing trick. UGLs sometimes label it higher to justify the price or make it seem like a “super strong” product.
💡 Reality check:
Pharma max: 200 mg/mL (always smooth).
UGL high end: 250–300 mg/mL (unstable).
500 mg/mL = basically impossible for Deca.
So yeah — 500 mg/mL is almost certainly fake, mislabeled, or dangerous to inject. It won’t save you money if you end up with bunk gear or painful, crashing oil.
👉 If cost is the issue, stick with 200 mg/mL. You’ll get a reliable, smooth product without risking garbage shots.
Do you want me to give you a quick trick on how you can test if a vial is really “500 mg/mL” (without a lab test)?
