It's true or not, but don't believe those few dollars. Some of them are cooks and start selling their own recipes if they don't want to work, but most of them are unreliable. If you must buy them, choose those that sell well. Most online recipes are on paper, and food is related to safety.

You can also make it according to the formula and method first, because even if it is true, if they do well, it doesn't mean you can do well. You still need to try it yourself. Technology is summed up by itself, and others just provide methods and processes.

So I suggest you think about it more when you choose, and look at the evaluation, sales volume, price and so on. , and it is best to have additional comments with pictures.