The vegetable oils are saturated fats, which will mix with the peanut oil, but solidify at room temperature. That and the sugar are doing the leg work on keeping the peanut butter from separating. So yeah, saturated fats and sugar are unhealthy additives specifically for preserving the peanut butter. What exactly is your definition of a preservative?
The vegetable oils are saturated fats, which will mix with the peanut oil, but solidify at room temperature. That and the sugar are doing the leg work on keeping the peanut butter from separating. So yeah, saturated fats and sugar are unhealthy additives specifically for preserving the peanut butter. What exactly is your definition of a preservative?