Where is Protein Found?
Protein is a crucial component of a healthy diet and is found in a wide variety of foods. Let's explore some key sources:
The following food groups are excellent sources of protein:
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Seafood: Fish, shellfish, and other marine life are packed with high-quality protein. Examples include salmon, tuna, shrimp, and cod.
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Meat, Poultry, and Eggs: These are classic sources of protein, offering various nutritional profiles. Examples include beef, chicken, turkey, and eggs.
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Beans, Peas, and Lentils: These legumes are excellent vegetarian sources of protein and also contribute fiber and other nutrients. Think kidney beans, chickpeas, lentils, and black beans.
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Nuts, Seeds, and Soy Products: These offer plant-based protein along with healthy fats and other beneficial nutrients. Examples include almonds, chia seeds, soybeans, and tofu.
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Dairy Products: Milk, yogurt, and cheese are good sources of protein, along with calcium and other vital nutrients (as mentioned in Better Health Channel).
Protein's Role Beyond Food
It's important to note that protein isn't only found in the foods we eat. Recent research highlights its presence in other places:
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Human Sweat: A study found a protein in human sweat that may offer protection against Lyme disease (MIT and University of Helsinki).
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Human Serum: A protein called SP-40,40 has been isolated and identified in human serum (PubMed).
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Brain Cells: Research suggests a protein that may protect brain cells from Alzheimer's disease (NPR).
The human body itself is largely composed of proteins, performing countless vital functions. In fact, at least 10,000 different proteins make up and maintain our bodies (Harvard's Nutrition Source).
While many studies focus on specific proteins and their roles in various biological processes (such as OSER1's influence on longevity – News-Medical), the core sources of dietary protein remain the food groups mentioned above. These provide the essential amino acids our bodies need to build and repair tissues. The USDA MyPlate program also emphasizes the importance of these protein food groups in a balanced diet.
