My advice is to go with products that work. If a product doesn't work and you think it is safe, it will probably work just fine. Keep in mind, all products are tested on a person. The product is not tested on a cow or dog or a chicken. It is a human, and we will be able to detect the product on them. It is not true of many things.
This is why I recommend that people use only those products that can be used by a man. To be frank, there is no such thing as "all natural", but I do have some advice to give. If you are buying products that is labeled as "all natural" and then find out it is not what you expected or have ordered, then that is okay. Just make sure you can find another store that has these items. If there is something you want to buy, but don't find that it really helps, then there are more possibilities. If you are looking for the right product for your penis size, you need to find a guy who can tell you whether it is better than the same product from a different guy who also has it that size. You need a person who can compare the penis to the one you have.