Compound index

Long-acting testosterone ester; the most common TRT and cycle base. Reaches steady state in ~5 weeks.

Half-life: 7d
Typical: 100.0 mg–600.0 mg

Testosterone Cypionate

Test Cyp, TC

Standard US TRT ester with a slightly longer release tail than enanthate. Steady state ~4–5 weeks.

Half-life: 7d
Typical: 100.0 mg–600.0 mg

Testosterone Propionate

Test P, TP

Short-acting ester with sharp peaks; requires frequent injection. Useful for frontloading.

Half-life: 2d
Typical: 50.0 mg–150.0 mg

Testosterone Undecanoate (Castor Oil)

Nebido, TU, Reandron

Very long-acting ester (Nebido). Dosed 1000 mg every 10–14 weeks for TRT. NHS standard.

Half-life: 34d
Typical: 750.0 mg–1000.0 mg

Testosterone Undecanoate (MCT Oil)

TU MCT, Testosterone Undecanoate

MCT-carried testosterone undecanoate; shorter apparent half-life than the castor-oil formulation.

Half-life: 20d
Typical: 500.0 mg–1000.0 mg

Testosterone Undecanoate (Oral)

Jatenzo, Andriol, Oral TU

Oral testosterone (Jatenzo/Andriol) with low lymphatic bioavailability; dosed twice daily with food.

Half-life: 0.8d
Typical: 158.0 mg–396.0 mg

AromatizesHepato: mild

Testosterone Phenylpropionate

Test PP

Medium-chain ester (Sustanon component). Simple model — peak calibrated from sibling esters.

Half-life: 3d
Typical: 50.0 mg–200.0 mg

Testosterone Isocaproate

Test Iso

Sustanon component with medium duration. Simple model — peak calibrated from sibling esters.

Half-life: 3d
Typical: 50.0 mg–200.0 mg

Testosterone Suspension

Test Base (injectable), Aquadose

Ester-free injectable testosterone (water base). Very sharp peaks; dosed daily.

Half-life: 1d
Typical: 25.0 mg–100.0 mg

Testosterone Decanoate

Test Deca

Long-chain ester (Sustanon component). Simple model.

Half-life: 6d
Typical: 100.0 mg–300.0 mg

Testosterone Gel (Testogel/AndroGel)

Testogel, AndroGel, Transdermal T

Transdermal testosterone gel providing steady low-level delivery. Transfer risk to others.

Half-life: 3d
Typical: 25.0 mg–100.0 mg

Testosterone Base (Sublingual)

Sublingual T, Testoplek

Sublingual testosterone with extremely rapid peak and clearance; dosed multiple times daily.

Half-life: 0.0d
Typical: 12.5 mg–50.0 mg

Boldenone Cypionate

EQ Cyp

Boldenone with a cypionate ester. Model inherited from testosterone cypionate — treat as approximate.

Half-life: 7d
Typical: 150.0 mg–400.0 mg

Trenbolone Enanthate

Tren E

Long-acting 19-nor injectable; potent androgen with no aromatization. Simple model — peak calibrated.

Half-life: 11d
Typical: 150.0 mg–400.0 mg

Trenbolone Acetate

Tren A, Fina

Short-acting 19-nor ester requiring every-other-day dosing. Simple model — peak calibrated.

Half-life: 2d
Typical: 35.0 mg–100.0 mg

Trenbolone Hexahydrobenzylcarbonate

Tren Hex, Parabolan

Long-acting trenbolone (original Parabolan). Simple model — peak calibrated.

Half-life: 8d
Typical: 100.0 mg–300.0 mg

Trestolone Acetate (MENT)

MENT, Trest A

7α-methyl-19-nortestosterone acetate; potent, aromatizing, investigational male contraceptive.

Half-life: 0.2d
Typical: 10.0 mg–50.0 mg

AromatizesHepato: mild

Masteron Propionate

Drostanolone Prop, Mast P

DHT-derived drostanolone propionate; anti-estrogenic, cutting agent. Simple model — peak calibrated.

Half-life: 2d
Typical: 50.0 mg–150.0 mg

DHT

Masteron Enanthate

Drostanolone Enth, Mast E

Longer-acting drostanolone ester. Simple model — peak calibrated.

Half-life: 8d
Typical: 200.0 mg–400.0 mg

DHT

Mesterolone (Proviron)

Proviron

Oral DHT derivative; low bioavailability, used for SHBG binding / anti-estrogenic effect.

Half-life: 0.5d
Typical: 25.0 mg–100.0 mg

Nandrolone Phenylpropionate

NPP, Durabolin

Short-acting 19-nor (NPP); faster clearance than Deca. Good for frontloading.

Half-life: 2d
Typical: 50.0 mg–200.0 mg

Nandrolone Decanoate

Deca, Nandrolone Deca

Long-acting 19-nor (Deca-Durabolin); collagen/joint benefits, very long clearance.

Half-life: 10d
Typical: 100.0 mg–400.0 mg

Boldenone Undecylenate (Equipoise)

EQ, Equipoise, Boldenone

Equipoise; long half-life, slow steady gains. Notorious for long detection times.

Half-life: 14d
Typical: 200.0 mg–600.0 mg

Dihydroboldenone (DHB)

DHB, 1-Testosterone Cypionate

1-testosterone (DHB); potent, non-aromatizing. Limited human PK data.

Half-life: 9d
Typical: 100.0 mg–300.0 mg

Primobolan (Oral)

Methenolone Acetate, Primo Oral

Oral methenolone acetate; mild, low-side, short half-life. Simple model — peak calibrated.

Half-life: 0.2d
Typical: 25.0 mg–100.0 mg

Primobolan (Injectable)

Methenolone Enanthate, Primo

Injectable methenolone enanthate; very long half-life, mild profile. Peak calibrated.

Half-life: 11d
Typical: 200.0 mg–400.0 mg

DHT

Halotestin

Fluoxymesterone, Halo

Extremely hepatotoxic oral; pure strength/aggression, minimal hypertrophy.

Half-life: 0.1d
Typical: 5.00 mg–30.0 mg

DHTHepato: severe

Anadrol

Oxymetholone, A50, Drol

AromatizesDHTHepato: severe

Potent oral mass builder; high water retention and significant hepatotoxicity.

Half-life: 0.3d
Typical: 25.0 mg–100.0 mg

Dianabol

Methandrostenolone, Dbol, Methandienone

AromatizesHepato: moderate

Classic oral mass builder; short half-life, strong aromatization. Simple model — peak calibrated.

Half-life: 0.2d
Typical: 15.0 mg–50.0 mg

Turinabol

4-Chlorodehydromethyltestosterone, Tbol

Oral cross between Dbol and Clostebol; low water retention, moderate liver toxicity. Peak calibrated.

Half-life: 0.7d
Typical: 20.0 mg–60.0 mg

Hepato: moderate

Winstrol (Oral)

Stanozolol, Winny

Oral stanozolol; cutting agent, joint pain common. Simple model — peak calibrated.

Half-life: 0.4d
Typical: 20.0 mg–50.0 mg

DHTHepato: moderate

Winstrol (Injectable)

Winstrol Depot, Stanozolol Inj

Injectable stanozolol suspension; micro-crystals give a long apparent peak.

Half-life: 3d
Typical: 50.0 mg–100.0 mg

Anavar

Oxandrolone, Var

Mild oral oxandrolone; favored in cutting and female use due to low androgenicity.

Half-life: 0.4d
Typical: 10.0 mg–50.0 mg

Superdrol

Methasterone

Design steroid methasterone; notorious for severe hepatotoxicity. Simple model — peak calibrated.

Half-life: 0.4d
Typical: 10.0 mg–30.0 mg

DHTHepato: severe

SARMs

Ostarine (MK-2866 / Enobosarm)

MK-2866, Enobosarm

Non-steroidal SARM; mild, used in cutting/recomp. Simple model (estimated).

Half-life: 1d
Typical: 10.0 mg–25.0 mg

Ligandrol (LGD-4033)

LGD-4033, LGD, Anabolicum

Potent SARM for lean mass; suppression evident at higher doses.

Half-life: 1d
Typical: 2.00 mg–10.0 mg

Andarine (S4)

S4, Andarine

SARM with notable vision-related side effects; short half-life requiring divided dosing.

Half-life: 0.2d
Typical: 12.5 mg–50.0 mg

Testolone (RAD-140)

RAD-140, RAD

Potent SARM; suppression and hepatotoxicity reported at higher doses.

Half-life: 2d
Typical: 5.00 mg–20.0 mg

Cardarine (GW-501516)

GW-501516, GW, Endurobol

PPARδ agonist (mislabeled as SARM); improves endurance. Not a hormone.

Half-life: 0.8d
Typical: 5.00 mg–20.0 mg

S-23

S23

Suppressive SARM explored for male contraception; short half-life.

Half-life: 0.2d
Typical: 5.00 mg–30.0 mg

Pharmaceuticals/Chemicals

Estradiol Topical (EstroGel)

EstroGel, E2 Gel

Transdermal estradiol for feminizing HRT. Steady low-level delivery.

Half-life: 2d
Typical: 500 mcg–1.50 mg

Estradiol Cypionate

E2 Cyp, Depo-Estradiol

Injectable estradiol cypionate used in feminizing HRT.

Half-life: 4d
Typical: 2.00 mg–10.0 mg

Estradiol Valerate

E2V, Progynon

Injectable estradiol valerate, common in feminizing HRT. Simple model.

Half-life: 4d
Typical: 2.00 mg–10.0 mg

Progesterone (Oral)

Prometrium, Oral P4

Micronized oral progesterone; short half-life with high first-pass metabolism.

Half-life: 0.9d
Typical: 100.0 mg–300.0 mg

Progesterone (Vaginal)

Vaginal P4

Vaginal micronized progesterone; bypasses much first-pass metabolism.

Half-life: 0.9d
Typical: 100.0 mg–400.0 mg

T3 (Triiodothyronine)

Liothyronine, Cytomel, T3

Liothyronine (T3); short half-life requiring divided dosing.

Half-life: 0.9d
Typical: 25 mcg–75 mcg

DNP

2,4-Dinitrophenol

Industrial mitochondrial uncoupler; extremely hazardous with documented fatalities. For harm-reduction reference only.

Half-life: 4d
Typical: 50.0 mg–200.0 mg

Hepato: severe

Arimidex (Anastrozole)

Anastrozole, Adex, AI

Non-steroidal aromatase inhibitor; used to control estradiol on-cycle. Over-suppression risk.

Half-life: 2d
Typical: 250 mcg–1.00 mg

Aromasin (Exemestane)

Exemestane, Exe, Suicidal AI

Steroidal (suicidal) aromatase inhibitor; permanently inactivates aromatase enzyme.

Half-life: 0.9d
Typical: 6.25 mg–25.0 mg

Clenbuterol (Oral)

Clen

β2-agonist bronchodilator used off-label for fat loss; cardiac stimulation risk.

Half-life: 1d
Typical: 20 mcg–120 mcg

Nolvadex (Tamoxifen)

Tamoxifen, Nolva, SERM

SERM used in PCT and on-cycle gynecomastia management. Active metabolite endoxifen.

Half-life: 2d
Typical: 10.0 mg–40.0 mg

Clomid (Clomiphene)

Clomiphene, Clomid, SERM

SERM that blocks hypothalamic estrogen receptors, boosting LH/FSH; primary PCT agent.

Half-life: 5d
Typical: 25.0 mg–100.0 mg

Cabergoline

Caber, Dostinex

Dopamine D2 agonist used to manage prolactin elevation (e.g. on 19-nors).

Half-life: 4d
Typical: 125 mcg–1.00 mg

Letrozole

Letro, Femara

Potent non-steroidal AI; highest estrogen suppression of the three common AIs.

Half-life: 1d
Typical: 625 mcg–2.50 mg

Nebivolol

Bystolic

β1-selective blocker with nitric-oxide-mediated vasodilation; BP management on-cycle.

Half-life: 0.7d
Typical: 2.50 mg–20.0 mg

Telmisartan

Micardis

Angiotensin II receptor blocker; PPAR-γ activity may improve lipid profile on-cycle.

Half-life: 1.0d
Typical: 20.0 mg–80.0 mg

Tadalafil

Cialis