Sarcopenia
Sarcopenia and why does it matter to liver patients?
Sarcopenia is the progressive loss of skeletal muscle mass, strength, and function, and it is very common in chronic liver disease and cirrhosis including MASLD and MASH.
1. What exactly is sarcopenia?
Sarcopenia is a muscle disorder involving:
- Loss of muscle mass
- Loss of muscle strength
- Loss of physical function
In liver disease, it develops because of:
- Chronic inflammation
- Insulin resistance
- Low glycogen stores
- Physical inactivity
- Poor nutrition or low protein intake
- Sarcopenic obesity (high fat mass + low muscle mass) is especially common in MASH
2. Why is sarcopenia so common in liver disease?
Because the liver and muscles are deeply connected. In cirrhosis and chronic liver disease, people often have:
- Low glycogen stores, so the body breaks down muscle for energy
- High inflammation, which accelerates muscle breakdown
- Altered gut microbiome, increasing inflammation and ammonia
- High myostatin, which blocks muscle growth
- Low testosterone, reducing muscle building signals
This creates a “perfect storm” for muscle loss.
3. How does sarcopenia affect those with liver cancer?
- Sarcopenia is linked to higher mortality in HCC patients
- It reduces tolerance to treatments (immunotherapy, TACE, surgery)
- It predicts complications and poorer quality of life
Why HCC worsens sarcopenia:
- Cancer related inflammation
- Increased metabolic demands
- Reduced appetite and intake
- Treatment related fatigue and inactivity
4. Is muscle loss all over the body or in certain areas?
Sarcopenia is not selective
Muscle loss happens globally, not just in one limb or one region.
However, some areas show changes earlier because they’re easier to measure:
- The psoas muscles (deep core muscle, seen on CT scans)
- The thighs
- The shoulders/upper arms
But the underlying process affects all skeletal muscle, including:
- Legs
- Arms
- Core
- Back
- Respiratory muscles (in advanced disease)
This is why people often describe:
- Weakness
- Trouble standing from a chair
- Slower walking
- Fatigue with simple tasks
5. Strength/resistance training and movement are vital
When you work your muscles, they will stimulate:
- Better protein synthesis
- Improved insulin sensitivity
- Reduced inflammation
- Increased overall muscle-building signals
6. Tips to Decrease the Risk of Sarcopenia
Nutrition
- Adequate protein
- Frequent meals
- Bedtime snack (to prevent overnight muscle breakdown)
- Addressing malabsorption or deficiencies
Strength training
- Light to moderate resistance
- Bands, bodyweight, water-based movement
- 2-3 days/week
Daily movement
- Walking
- Chair exercises
- Short bouts of activity
7. Treat underlying contributors
- Low testosterone
- Inflammation
- Poor sleep
- Depression/anxiety
- High ammonia (encephalopathy)
8. Medical support
- Dietician
- Screening for sarcopenia (CT, BIA, grip strength, chair stands)
- Monitoring weight and muscle function
| Condition | Is Sarcopenia Common? | Notes |
|---|---|---|
| MASLD/MASH (no cirrhosis) | Yes, 20-44% | Strongly linked to insulin resistance, obesity, inflammation |
| Cirrhosis (any cause) | Very common, 20-40% | Worsens with fibrosis stage; predicts outcomes |
| MASH-related cirrhosis | High, especially with diabetes | Diabetes nearly doubles the risk |
| Hepatocellular carcinoma (HCC) | Very common | Major predictor of survival and treatment tolerance |
