Gelatin is a protein that doesn't contain vitamins.
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Protein on its own does not contain vitamins. Luckily, the proteins in your diet aren't isolated. The protein-containing foods you consume every day supply a variety of essential vitamins. Most sources of protein are good sources of all the B vitamins. Animal-based proteins are excellent sources of vitamin B-12, while legumes are rich in folate. You'll also get vitamins A and D from select protein foods.
Protein consists of many amino acids connected together into long chains and folded or twisted into complex shapes. Amino acids are made from various combinations of hydrogen, carbon, oxygen, nitrogen and sulfur. This means they don't contain any vitamins. Gelatin is one of the few examples of a food that consists of nearly pure protein. It's produced from the protein collagen, which is extracted from animals. One serving of prepared gelatin mix doesn't contain a measurable amount of any vitamins, according to the U.S. Department of Agriculture's National Nutrient Database.
Foods with the highest amount of protein -- meat, poultry and fish -- supply about 20 to 25 grams of protein in a 3-ounce serving. They contain all of the B vitamins, such as niacin and vitamin B-6, but they're especially good sources of vitamin B-12, which only occurs naturally in animal-based foods. You can count on getting at least 10 percent of the recommended dietary allowance per serving from most types of meat, poultry and fish. Dairy products and eggs provide less total protein -- 6 to 8 grams per serving -- but they're still good sources of B vitamins, including B-12.
Beans, peas and lentils provide about 15 grams of protein in a 1-cup serving. While they contain thiamin, riboflavin, niacin and vitamin B-6, legumes also effectively boost your folate. You'll get a wide range of amounts of folate from different types of legumes. A 1-cup serving of one of the lowest sources, canned chickpeas, supplies 15.5 percent of the recommended dietary allowance of 400 micrograms. At the high end, you can get as much as 358 micrograms from a 1-cup serving of boiled lentils.
Dairy products and eggs are good sources of vitamin A. Tuna, bluefish, king mackerel, clams and salmon provide at least 10 percent of the recommended dietary allowance for vitamin A in a 3-ounce serving. Only salmon and clams, however, are low in mercury, a contaminant in some fish you should avoid, especially if pregnant. Some types of fish, such as salmon, sardines and mackerel, are excellent sources of vitamin D. Other types of fish have vitamin D in smaller amounts. You'll also get vitamin D from egg yolks, with the yolk from one large egg delivering 6 percent of the recommended dietary allowance. Dairy products only supply vitamin D if they're fortified.
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Busch, Sandi. "Does Protein Have Vitamins?" Healthy Eating | SF Gate, http://healthyeating.sfgate.com/protein-vitamins-10756.html. Accessed 18 April 2019.
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