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Artificial ingredients in protein powder are substances that are added to the product to enhance its flavor, texture, or shelf life. These ingredients are typically chemically synthesized, and they may not be found naturally in food. Some examples of artificial ingredients that may be found in protein powder include:

1. Artificial sweeteners: These are sugar substitutes that are added to protein powder to enhance its taste without adding calories. Some common artificial sweeteners used in protein powder include sucralose, aspartame, and acesulfame potassium.
2. Artificial colors: These are synthetic dyes that are added to protein powder to enhance its appearance. Some common artificial colors used in protein powder include FD&C Yellow #5, FD&C Red #40, and FD&C Blue #1.
3. Artificial flavors: These are chemical compounds that are added to protein powder to enhance its taste. Some common artificial flavors used in protein powder include vanillin, ethyl vanillin, and maltol.
4. Preservatives: These are substances that are added to protein powder to prevent spoilage and increase its shelf life. Some common preservatives used in protein powder include sodium benzoate, potassium sorbate, and BHA (butylated hydroxyanisole).

While these ingredients are generally recognized as safe by regulatory agencies like the FDA, some people may prefer to avoid artificial ingredients for personal or health reasons. It's important to read the label and ingredient list carefully when choosing a protein powder and to consult with a healthcare professional or a registered dietitian if you have specific concerns.