Many commercial peanut butters contain added oils like soybean oil to improve texture and prevent separation. While this makes the product more stable on shelves, it also reduces purity and shifts the product away from its whole-food roots.
Choosing peanut butter made with just peanuts (and sometimes a pinch of salt) ensures you are getting a more natural source of healthy fats and protein without unnecessary additives.
Reading ingredient labels is key here, as front packaging can be highly misleading compared to the actual formulation.