Is it legal to use ingredients from an existing product? For example, imagine I love Bio-Oil and I decide I want to make something similar, would it be legal or illegal if I used every ingredient in it, then I add two other ingredients that are not included? Would Bio-Oil be able to sue me with the claim that my product consisted of most of their ingredients, but not exactly the same?
Basically, the ingredients are listed on the packaging, but the same ingredients are ingredients that you find commonly used in that type of product. My thought is, no one really has ownership of ingredients (e.g., body oils often use the same standard ingredients), so how can they suspect I was copying them?