/hrt/feminizing/estradiol-undecylate
Estradiol Undecylate
[estradiol]Rev: 2025.12
Summary
Very long-acting injectable estradiol ester. Allows for injections every 4-6 weeks. Less commonly available than EV or EC.
DESCRIPTION
Estradiol undecylate (EU) is a long-acting injectable estradiol ester with an extremely long half-life of approximately 30+ days. It is dissolved in oil and administered via intramuscular or subcutaneous injection. Due to its very long duration, it allows for less frequent injections compared to other esters.
DOSING GUIDELINES
| Route | Dose Range | Frequency | Target Levels |
|---|---|---|---|
| Injection (IM) / Injection (SubQ) | 20mg – 40mg | Monthly | 300-400pg/mL |
DETAILED NOTES
Injection (IM) / Injection (SubQ)
Long lasting ester, see estrannai.se.
WHERE TO BUY
LIVE STOCKEstradiol Undecylate40mg/mL
Hera HRTCOMMUNITY TRUSTED• vial• 10mL
$80.00IN STOCK
Estradiol Undecylate 10mL 80mg/mL80mg/mL
Open Gate LabsCOMMUNITY TRUSTED• vial• 10mL
$119.99OUT OF STOCK
20ml -Estradiol Undecylate (EU, Eduiol U) 10mg/ml - 1vial---120#10mg/ml
Purple Panda LabsUNVERIFIED• vial• 20ml
$35.0IN STOCK
Estradiol Undecylate (EU, Eduiol U)10mg/ml
Dragon OrdnanceUNVERIFIED• injectable• 20ml
$40.25IN STOCK
Estradiol Undecylate50mg/mL
Voix CelesteINACTIVE• Injectable• 10mL
€70.00OUT OF STOCK
Estradiol Undecylate 100mg/mL100mg/mL
Voix CelesteINACTIVE• Injectable• 5mL
€70.00OUT OF STOCK
Estradiol Undecylate in Grapeseed Oil50mg/mL
Voix CelesteINACTIVE• Injectable• 10mL
€70.00OUT OF STOCK
Stock and prices updated automatically. Click to visit supplier.
Rev: 2025.12hrt.fm