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Ostarine (MK-2866)

SARM

MK-2866

The most-studied and best-tolerated SARM. Ideal to start with SARMs, or for cutting and recomp. Mini-PCT of 4 weeks (Nolvadex 20 mg/day) if suppression is felt.

Half-life

24 heures

Detection

4 semaines

Anabolic ratio

100

Androgenic ratio

33

Oral

Dosages

Beginner10–15 mg/j
Intermediate20–25 mg/j
Advanced25–30 mg/j
Female5-10 mg/day (very well tolerated)

Frequency : 1× / day (morning)

Effects

  • Muscle preservation when cutting
  • Moderate lean mass gains
  • Strength
  • Joint recovery

Side effects

  • Mild to moderate suppression (> 25 mg/day)
  • Mild lethargy
  • Slight vision changes

Support supplements

Omega-3Vitamin D3Zinc

Synergies & stacks

Cardarine (cutting)LGD-4033 (bulking)RAD-140

Avoid

  • Doses > 30 mg/day without monitoring
  • Cycles > 12 weeks without a break

AnaProtoKol is a health and performance tracking tool. This information is provided for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any protocol.

Sources

Studies and scientific publications this guide relies on.

  1. Dalton JT, Barnette KG, Bohl CE, et al. (2011). The selective androgen receptor modulator GTx-024 (enobosarm) improves lean body mass and physical function in healthy elderly men and postmenopausal women: results of a double-blind, placebo-controlled phase II trial. Journal of Cachexia, Sarcopenia and Muscle. doi: 10.1007/s13539-011-0034-6

    RCT phase II double-aveugle 12 sem (120 sujets âgés et femmes ménopausées) : enobosarm (ostarine) 1 ou 3 mg/j augmente la masse maigre de manière dose-dépendante et améliore la performance au stair climb, avec suppression dose-dépendante de la testostérone totale (-31 % à 1 mg, -57 % à 3 mg).

  2. Solomon ZJ, Mirabal JR, Mazur DJ, et al. (2019). Selective Androgen Receptor Modulators: Current Knowledge and Clinical Applications. Sexual Medicine Reviews. doi: 10.1016/j.sxmr.2018.09.006

    Revue systématique sur les SARMs : ostarine est le SARM le plus étudié cliniquement (phase III avortée), demi-vie ~24 h, suppression HPTA réelle à doses musculation, élévations ALAT et baisse HDL documentées.

  3. Bhasin S, Jasuja R (2009). Selective androgen receptor modulators as function promoting therapies. Current Opinion in Clinical Nutrition and Metabolic Care. doi: 10.1097/MCO.0b013e32832a3d79

    Revue Bhasin et Jasuja sur le rationnel pharmacologique des SARMs : ostarine (GTx-024) est l'archétype du SARM tissu-sélectif, ligand non stéroïdien du RA recrutant des co-régulateurs différenciés selon le tissu — base de la sélectivité muscle/os vs prostate.

  4. Pope HG Jr, Wood RI, Rogol A, et al. (2014). Adverse health consequences of performance-enhancing drugs: an Endocrine Society scientific statement. Endocrine Reviews. doi: 10.1210/er.2013-1058

    Énoncé Endocrine Society : les SARMs (dont ostarine) présentent un profil HPTA suppressif réel, des élévations ALAT, une baisse HDL et un manque de recul clinique long terme — monitoring biologique avant/pendant/après recommandé.

Related guides

First SARMs cycle

SARMs PCT guide

SARMs vs steroids vs peptides

SARMs explained

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AnaProtoKol is a health and performance tracking tool. This information is provided for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any protocol.