Is Optimum Nutrition Gold Standard 100% Isolate Chocolate Bliss Flavor Vegan?

No. This product is not vegan as it lists 3 ingredients that derive from animals.

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Why it's not vegan

milk
whey protein isolate
hydrolyzed whey protein isolate

milk

Dietitian note

Milk is a nutrient-rich liquid food produced by mammals.

Note by Rhyan Geiger, RDN

whey protein isolate

hydrolyzed whey protein isolate

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Notes and swaps for all 3 flagged ingredients, plus vegan products to buy instead.

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Ingredients

Hydrolyzed Whey Protein Isolate [MILK], Whey Protein Isolate [MILK] (Emulsifier: Soy Lecithin), Cocoa (Processed with Alkali), Flavors, Salt, Sweetener (955). Contains: Milk and Soy.

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What is a Vegan diet?

A vegan diet excludes all animal-derived foods, including meat, poultry, fish, dairy, eggs, and honey. It focuses on plant-based sources such as fruits, vegetables, grains, legumes, nuts, and seeds. Many people choose veganism for ethical, environmental, or health reasons. When well-planned, it provides sufficient protein, fiber, and antioxidants, though supplementation or fortified foods may be needed for nutrients like vitamin B12, iron, and omega-3 fatty acids. Vegan diets are associated with lower risks of heart disease and improved digestion but require mindfulness to ensure balanced and complete nutrition.