Peptide profile

Muscle growth Limited human

Ornithine Alpha-Ketoglutarate (OKG)

Dipeptide for nitrogen retention and muscle recovery

Compare Ornithine Alpha-Ketoglutarate (OKG) with other peptides →

Summary

Dipeptide precursor for muscle protein synthesis.

A tiny building block that helps your body make muscle.

Typical dose: 5-15g Daily (split into 2-3 doses)
Route: Oral
Cycle length: Ongoing
Evidence: Limited human data

Mechanism

How it works

OKG acts like a booster shot for muscle building — it provides the building blocks (amino acids) and the signal (insulin/GH) to kickstart protein synthesis.

OKG is a salt of ornithine and α-ketoglutarate that stimulates insulin and growth hormone secretion while providing glutamate and arginine precursors.

Reported in research

Benefits

Improves nitrogen balance and protein synthesis
Reduces muscle wasting in catabolic states
Enhances recovery after exercise
Supports immune function

Helps your body keep and build muscle protein
Helps stop muscle from wasting away when you're sick or weak
Helps your muscles heal faster after exercise
Helps your body fight off germs

Context, not a prescription

Dosing

Typical range: 5-15g Daily (split into 2-3 doses) (Oral)
Cycle length: Ongoing

Safety

Side effects & contraindications

Possible side effects

Mild GI upset at high doses
Loose stools (rare)
Nausea
Bloating

Contraindications

Pregnancy or breastfeeding (limited data)
Severe liver disease

Research information, not medical advice. Always consult a licensed clinician before considering any peptide.

In depth

Full profile

What it does

Your muscles heal better, waste away less, and you fight germs better.

How it works

OKG works like a boost for building muscle. It gives the building blocks and the signal to start making muscle protein.

It raises helpful building blocks in your blood. It turns on a switch that builds muscle and stops muscle from breaking down.

What to expect

It works slowly over weeks, not all at once.

Days 3-5: Your body holds onto muscle protein better.
Weeks 2-4: Your muscles heal faster.
Weeks 4-6: Your body makes more muscle protein.

Good to know

Start with 5g/day
Take it with food so your tummy feels okay

Staying safe

A little tummy upset if you take too much
Runny poop (not common)

Avoid if you have:

Moms who are pregnant or breastfeeding (we don't know enough yet)
People with very sick livers

Overview

Improved muscle recovery, reduced muscle wasting, better immune function.

How it works

OKG acts like a booster shot for muscle building — it provides the building blocks (amino acids) and the signal (insulin/GH) to kickstart protein synthesis.

Increases plasma ornithine, arginine, glutamate, and glutamine levels; stimulates mTOR pathway and reduces protein breakdown.

Onset & timeline

Chronic use over weeks; not acute.

Days 3-5: Improved nitrogen balance.
Weeks 2-4: Better muscle recovery.
Weeks 4-6: Enhanced protein synthesis.

Getting the most from it

Start with 5g/day
Take with meals to reduce GI upset

Common side effects

Mild GI upset at high doses
Loose stools (rare)

Mechanism of action

OKG is a salt of ornithine and α-ketoglutarate that stimulates insulin and growth hormone secretion while providing glutamate and arginine precursors.

Increases plasma ornithine, arginine, glutamate, and glutamine levels; stimulates mTOR pathway and reduces protein breakdown.

Pharmacodynamics

Chronic use over weeks; not acute.

Improved muscle recovery, reduced muscle wasting, better immune function.

Timeline

Days 3-5: Improved nitrogen balance.
Weeks 2-4: Better muscle recovery.
Weeks 4-6: Enhanced protein synthesis.

Comparisons

OKG — effectiveness Moderate, safety Excellent, cost $, Very Easy to use
BCAAs — effectiveness Low, safety Excellent, cost $, Very Easy to use

Adverse effects

Common:

Mild GI upset at high doses
Loose stools (rare)

Rare:

Nausea
Bloating

Contraindications & risk mitigation

Contraindicated in:

Pregnancy or breastfeeding (limited data)
Severe liver disease

Start with 5g/day
Take with meals to reduce GI upset

Qué hace

Tus músculos sanan mejor, se pierden menos y tu cuerpo combate mejor los gérmenes.

Cómo funciona

El OKG funciona como un impulso para construir músculo. Proporciona los bloques de construcción y la señal para comenzar a fabricar proteína muscular.

Aumenta los bloques de construcción útiles en tu sangre. Activa un interruptor que construye músculo y evita que se descomponga.

Qué esperar

Funciona lentamente durante semanas, no de golpe.

Días 3-5: Tu cuerpo retiene mejor la proteína muscular.
Semanas 2-4: Tus músculos sanan más rápido.
Semanas 4-6: Tu cuerpo produce más proteína muscular.

Bueno saber

Comenzar con 5 g/día
Tomarlo con comida para que el estómago se sienta bien

Manteniéndose seguro

Un poco de malestar estomacal si tomas demasiado
Heces blandas (no es común)

Evitar si tienes:

Mujeres embarazadas o en lactancia (aún no sabemos lo suficiente)
Personas con enfermedades hepáticas graves

Descripción general

Mejor recuperación muscular, reducción del desgaste muscular y mejor función inmunitaria.

Cómo funciona

El OKG actúa como un impulso para la construcción muscular: proporciona los bloques de construcción (aminoácidos) y la señal (insulina/GH) para iniciar la síntesis de proteínas.

Aumenta los niveles plasmáticos de ornitina, arginina, glutamato y glutamina; estimula la vía mTOR y reduce la degradación de proteínas.

Inicio y cronología

Uso crónico durante semanas; no es de acción aguda.

Días 3-5: Mejora del equilibrio de nitrógeno.
Semanas 2-4: Mejor recuperación muscular.
Semanas 4-6: Síntesis de proteínas mejorada.

Cómo aprovecharlo al máximo

Comenzar con 5 g/día
Tomar con las comidas para reducir el malestar gastrointestinal

Efectos secundarios comunes

Malestar gastrointestinal leve en dosis altas
Heces blandas (raro)

Mecanismo de acción

El OKG es una sal de ornitina y α-cetoglutarato que estimula la secreción de insulina y hormona del crecimiento, al tiempo que proporciona precursores de glutamato y arginina.

Aumenta los niveles plasmáticos de ornitina, arginina, glutamato y glutamina; estimula la vía mTOR y reduce la degradación de proteínas.

Farmacodinamia

Uso crónico durante semanas; no es de acción aguda.

Mejor recuperación muscular, reducción del desgaste muscular y mejor función inmunitaria.

Cronología

Días 3-5: Mejora del equilibrio de nitrógeno.
Semanas 2-4: Mejor recuperación muscular.
Semanas 4-6: Síntesis de proteínas mejorada.

Comparaciones

OKG — efectividad Moderada, seguridad Excelente, costo $, Muy fácil de usar
BCAAs — efectividad Baja, seguridad Excelente, costo $, Muy fácil de usar

Efectos adversos

Comunes:

Malestar gastrointestinal leve en dosis altas
Heces blandas (raro)

Raros:

Náuseas
Hinchazón abdominal

Contraindicaciones y mitigación de riesgos

Contraindicado en:

Embarazo o lactancia (datos limitados)
Enfermedad hepática grave

Comenzar con 5 g/día
Tomar con las comidas para reducir el malestar gastrointestinal

Reference data

Specifications

Route: Oral
Cycle length: Ongoing

FAQ

Common questions

Is OKG similar to ornithine alone?

OKG provides both ornithine and α-ketoglutarate, which may be synergistic for muscle recovery.

Does it work for older adults?

Yes, used in clinical nutrition to prevent muscle wasting in elderly and catabolic patients.

What is the evidence level?

This compound is classified as Limited human data. Some human data exists but trials are small, short-term, or not yet replicated.

Research

Research & sources

Limited human

Current evidence for Ornithine Alpha-Ketoglutarate (OKG) is rated as Limited human data. Limited human data is available.

1. OKG in catabolic states (1992) — DOI:10.1097/00005792-199201000-00004
2. Ornithine α-ketoglutarate (2000) — DOI:10.1097/00075197-200005000-00002
3. OKG in catabolic states (1992)
4. Ornithine α-ketoglutarate (2000)