September 2026
Protein is one of the three major macronutrients, along with carbohydrates and fats. Your body needs protein every day for growth, repair, maintenance and many essential body functions. Whether you are young or older, physically active or recovering from illness, getting adequate protein as part of a balanced diet is important.
Why Does Your Body Need Protein?
- Supports muscle health — protein provides amino acids needed to build and maintain muscles, which matters increasingly as we age.
- Helps in tissue repair — especially important during recovery from illness, injury or surgery.
- Supports immune function — many components of the immune system are made from proteins.
- Helps keep you full — including a protein source in meals and snacks supports a balanced eating pattern.
- Supports important body functions — protein is involved in producing enzymes, hormones and other essential substances.
How Much Protein Do You Need?
Protein requirements are not the same for everyone. Your needs can depend on:
- Age
- Body weight
- Physical activity
- Pregnancy or breastfeeding
- Medical conditions
- Recovery from illness or surgery
- Kidney and liver function
For healthy adults, protein requirements are commonly estimated based on body weight, but people with medical conditions may require a different amount. More protein is not automatically better. If you have kidney disease, liver disease or another medical condition, discuss your protein requirement with your doctor or dietitian rather than following a high-protein diet on your own.
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This article is general information and not a substitute for a consultation. Please speak to a doctor about your own symptoms.