LAST UPDATED JAN 21, 2026
/hrt/masculinizing/testosterone-undecanoate

Testosterone Undecanoate

[testosterone]
Rev: 2025.12
Summary
Very long-acting testosterone ester. Injectable form is typically in MCT oil and allows for very infrequent dosing. Also available as oral capsules.

DESCRIPTION

Testosterone undecanoate (TU) is a very long-acting testosterone ester available in both injectable and oral forms. The injectable form (Nebido/Aveed) has an extremely long half-life allowing for injections every 10-14 weeks. The oral form is taken daily with food.

DOSING GUIDELINES

RouteDose RangeFrequencyTarget Levels
Injection (IM) / Injection (SubQ)300mg400mgMonthly600ng/dL
Oral120mg160mgDaily600ng/dL

DETAILED NOTES

Injection (IM) / Injection (SubQ)

Very long lasting, infrequent injections.

Oral

Despite longer ester chain, taken daily.

WHERE TO BUY

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Rev: 2025.12hrt.fm