What is the best proven product in the market today that would remove very old stretch marks?

When you find it let me know. I've had stretch marks for 40 years and nothing has ever worked that I found on the market for sale. The marks will fade but never truly go away. It's just something you trade when you have kids I've found.

To be totally honest, you cannot completely get rid of stretch marks but there are products out there that make them look less visible.
Cocoa butter is a popular choice among people with stretch marks. This will help soften it and make it look less visible.
Hope that helps. :)

Unfortunately, there are no products on the market that will remove stretch marks, but there some things that can improve of them. The use of products containing vitamin E, wheat germ or bio oil will help soften the appearance of stretch marks. Retin-A or alpha hydroxy acid creams can also reduce stretch marks. But the only effective way to remove stretch marks is by laser surgery, microdermabrasion, chemical peels or other surgery procedures.