What is protein?
![What is protein?](https://cdn.mos.cms.futurecdn.net/zQee9UCQr9hHA64xXPUZxf-1200-80.jpg)
Protein is a macronutrient that is essential to building muscle mass. It is commonly found in animal products, though is also present in other sources, such as nuts and legumes.
![](http://atlasbars.com/cdn/shop/articles/rEPfUHVb8yStSy8mCclDkrNW6bJeL2tewAB1tTJIQr9uHbGiA-out-0.png?v=1686227776)
Energy Value of Protein: How Many Calories Are in It?
![](https://www.hsph.harvard.edu/nutritionsource/wp-content/uploads/sites/30/2018/11/HEP_Icon_protein.png)
Protein, The Nutrition Source
![](https://www.washingtonpost.com/wp-apps/imrs.php?src=https://arc-anglerfish-washpost-prod-washpost.s3.amazonaws.com/public/CJKHOK4DGFTT4JQZO2VHWU36WE.jpg&w=1440)
5 things to know about protein - The Washington Post
![](https://www.purefoodcompany.com/wp-content/uploads/2023/02/foods-high-in-protein.jpg)
Protein 101: A Complete Guide for Beginners to Calculate Your Optimal Daily Requirements
![](https://www.trifectanutrition.com/hs-fs/hubfs/Pure-Proteins-(1)-1.jpg?width=610&name=Pure-Proteins-(1)-1.jpg)
50 High Protein Foods to Help You Hit Your Macros
![](https://static.wixstatic.com/media/a04440_a9c2254619444004b216cf3fa6880581~mv2.jpg/v1/fit/w_1000%2Ch_800%2Cal_c%2Cq_80,enc_auto/file.jpg)
What is whey protein?
![](https://medlineplus.gov/images/PX000078_PRESENTATION.jpeg)
What are proteins and what do they do?: MedlinePlus Genetics
![](https://images.ctfassets.net/eexbcii1ci83/5Gk4qERBQbkIi5bqw0HmIo/415bb67aa835dd0628549bb18c9e8dc4/Different_types_of_protein_rich_food.jpg)
What is Protein - Why our body needs protein?
![](https://www.heart.org/-/media/Healthy-Living-Images/Infographics/Plant_based_protein_sources_infographic.jpg)
Plant-Based Protein Infographic
![](https://absolutebodysolutions.com/wp-content/uploads/2022/07/online-2022-07-18T143610.306.png)
Protein - What is it? & Why it's Important - Absolute Body Solutions
![](https://i.ytimg.com/vi/Q2FwLSSXZFY/hqdefault.jpg)
What is protein? Herbalife Nutrition
![](https://www.verywellhealth.com/thmb/YjKgabQDXXQLOqIjY6uNROiF2aA=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/GettyImages-1145581060-c6f3afa5f308461cab0a77d79a51c68a.jpg)
Protein: What It Is, Types, Uses, Needs, Deficiency
![](https://image.slidesharecdn.com/biologyproteinstructure-131120235031-phpapp01/85/biology-protein-structure-1-320.jpg?cb=1668169185)
Biology protein structure
Why is protein synthesis important? - Quora