Test E, Deca, DBOL Cycle AUSTRALIAN BODYBUILDING & FITNESS FORUM

Test E, Deca, DBOL Cycle AUSTRALIAN BODYBUILDING & FITNESS FORUM Overview of Testosterone Enanthate Dosing
The following guide summarises the commonly discussed dosage levels for Testosterone Enanthate (a long‑acting injectable testosterone ester) that appear in online forums and support‑group discussions.
> Important: This information is purely educational. It does not replace professional medical advice. Always consult a qualified healthcare provider before initiating, adjusting, or discontinuing any hormone therapy.

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1. Commonly Mentioned Dose Ranges CategoryTypical Dose (mg)Frequency of AdministrationApproximate Duration of Effect Baseline/Replacement100–200 mg per weekOnce weekly (or every 2 weeks at the higher end)4–6 weeks Therapeutic/Bodybuilding200–400 mg per weekWeekly or koseongnam.com split dosing (e.g., two injections of 150 mg each)3–5 weeks High-Intensity Protocols> 400 mg per weekTwice weekly or more frequent1–2 weeks
> Key point: The total weekly dose is the most important determinant of systemic effects, not the individual injection size. Splitting a high dose into multiple injections can reduce peak plasma concentration but does not change the overall exposure.

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How the Body Processes Testosterone Absorption PhaseDetails InjectionIntramuscular depot (e.g., testosterone enanthate) releases oil‑soluble ester into muscle tissue. DiffusionEster slowly diffuses into interstitial fluid and then into capillaries. Peak Concentration (Cmax)Occurs ~24–48 h after injection, depending on the specific ester.
Metabolism
Enzyme Hydrolysis - Testosterone esterase in blood and tissues cleaves the ester group → free testosterone + fatty acid.
Oxidation / Reductive Pathways - CYP3A4 (liver) converts testosterone to 6β-hydroxytestosterone.

- AKR1C3 reduces androstenedione to testosterone; AKR1C2/5 convert testosterone → 5α-dihydrotestosterone (DHT).

Conjugation - UDP-glucuronosyltransferases (UGTs) attach glucuronic acid → testosterone‑glucuronide.

- Sulfotransferases (SULTs) add sulfate groups → testosterone‑sulfate.

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2. Metabolic Pathways StepReactionKey Enzymes & Proteins 1Activation of cholesterol to pregnenoloneCYP11A1 (P450SCC) – mitochondrial; CYP27A1 also contributes. 2Pregnenolone → Progesterone3β‑HSD (HSD3B1/2) – cytosolic, membrane‑bound. 3Progesterone → Pregnenolone5α‑Reductase type 1/2 (SRD5A1/2). 4Pregnenolone → Progesterone (reverse)3β‑HSD (again). 5Progesterone → 17α‑HydroxyprogesteroneCYP17A1 (17α‑hydroxylase). 617α‑Hydroxyprogesterone → Dehydroepiandrosterone (DHEA)CYP17A1 (17,20‑lyase). 7Dehydroepiandrosterone (DHEA) → AndrostenedioneHSD3B2. 8Androstenedione → TestosteroneHSD17B3 or 17β‑hydroxysteroid dehydrogenase type 5.
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4. Enzymes that Regulate Steroid Hormone Production Cytochrome P450scc (CYP11A1) – converts cholesterol to pregnenolone (first step in all steroidogenesis). 17α‑Hydroxylase/17,20‑lyase (CYP17A1) – essential for glucocorticoid and androgen synthesis; dual activity: 17α‑hydroxylation of pregnenolone/corticosterone to form dehydroepiandrosterone (DHEA) & androstenedione. 21‑Hydroxylase (CYP21A2) – converts progesterone & 17‑OHP to 11-deoxycortisol and corticosterone, respectively. 24‑Hydroxylase (CYP24A1) – catabolic enzyme for 1α,25‑dihydroxyvitamin D3; it also degrades 7‑dehydrocholesterol to 7‑hydroxyderivatives. 27‑Hydroxylase (CYP27B1) – the key vitamin D3 activating enzyme that converts 25‑OH‑D3 to 1α,25‑(OH)₂‑D₃; it also hydroxylates cholesterol derivatives in bile acid synthesis. These enzymes illustrate the broad functional diversity of the CYP24A1 and CYP27B1 families beyond classical steroid metabolism.