---
title: "Liothyronine"
description: "⚠️ T3 massively increases metabolism but is highly catabolic without anabolic protection. Always pair with steroids. Gradual taper mandatory to let the thyroid resume natural activity (descending steps)."
lang: en
dateModified: 2026-05-25
canonical: https://anaprotokol.com/en/molecule/t3
---

# Liothyronine

⚠️ T3 massively increases metabolism but is highly catabolic without anabolic protection. Always pair with steroids. Gradual taper mandatory to let the thyroid resume natural activity (descending steps).

**Catégorie** : Brûleur de graisse
**Voie d'administration** : Oral
**Demi-vie** : 2,5 jours
**Détection** : Difficile à détecter (hormonal naturel)
**Aromatisation** : Non
**Progestine** : Non
**Hépatotoxique** : Non
**PCT requise** : Non

**Autres noms** : T3, Cytomel

## Effets
- Accelerated basal metabolism ++
- Powerful lipolysis
- Fast weight loss
- Paradoxical increase in appetite

## Effets secondaires
- Muscle catabolism without steroids
- Endogenous thyroid suppression
- Tachycardia
- Excessive sweating
- Sleep disturbances
- Anxiety

## Suppléments de soutien
- Anabolic steroids (muscle protection)
- Protein ++
- BCAA
- Omega-3

## Synergies
- Clenbuterol (classic T3+Clen stack)
- Anabolic steroids (essential)

## À éviter
- Use without steroids (heavy muscle loss)
- Abrupt stop (rebound hypothyroidism)
- Duration > 8-10 weeks
- Doses > 75 mcg/day without medical monitoring

## Dosage masculin
- Débutant : 25 mcg/j
- Intermédiaire : 50–75 mcg/j
- Avancé : 100 mcg/j (risqué)

## Dosage féminin
12.5-50 mcg/day

**Fréquence** : 1-2× / day · Gradual increase in 25 mcg steps