The Common Chip Flavor That's Strangely Not Vegan-Friendly - Tasting Table
Many salt and vinegar chips contain lactose, which is derived from milk. This ingredient adds creaminess and balances the sourness, making the chips more palatable.
New research is bad news for vegans - even if you eat plant-based protein
"[Plant-based diets], while higher in beneficial nutrients and wholefood groups than regular meat-eaters, may lead to nutritional inadequacies if not planned appropriately."