Many of the best sources are parts of animals that are often discarded.
1. Chicken Skin
Chicken skin contains collagen-rich connective tissue that provides glycine.
2. Bone Broth
Slow-cooked bones release collagen and gelatin, making bone broth one of the richest natural dietary sources of glycine.
3. Pork Skin
Pork skin is rich in collagen proteins that naturally contain glycine.
4. Fish Skin
Fish skin is another excellent source of collagen and glycine.
5. Gelatin
Gelatin is made from collagen and is naturally high in glycine.
Other Good Sources
- Beef
- Turkey
- Chicken
- Eggs
- Dairy products
- Legumes
- Seeds
Tips for Supporting a Healthy Liver
Rather than relying on one nutrient, focus on overall healthy habits:
- Eat plenty of vegetables and fruits.
- Include lean proteins and healthy fats.
- Limit excess sugar and ultra-processed foods.
- Stay physically active.
- Maintain a healthy body weight.
- Drink alcohol in moderation or avoid it if advised by your healthcare provider.
- Stay hydrated.
Final Thoughts
Glycine is an important amino acid with several essential roles in the body. It contributes to collagen production, antioxidant defenses, and normal liver function, and foods rich in collagen—such as bone broth, fish skin, and poultry skin—can provide higher amounts of glycine.
While glycine may support liver health as part of a balanced diet, it is not a proven cure for fatty liver disease or a shortcut to rapid weight loss. The best approach to protecting your liver remains a healthy lifestyle that includes nutritious food, regular exercise, and medical care when needed.
