This kind of thing is hard to say. I've done it in the medical field before. They always brag about how amazing their products are, what effect they can achieve and what technology they use. When it comes to bringing their products back to life, the effect will not be too much or too little, but it will definitely not be as they say. You'd better be careful when selling this product. If you are brainwashed, you will be like them. Besides, they won't tell you that "young people are young."