What does the author think about detox products?

Choices:
A. they are healthy and beneficial for most people
B. they should be done at least once a year
C. they are a scam
D. not enough information
they are a scam
I repeatedly see people asking advice on forums as to which is the best detox to do. Whenever I see this question I want to scream at the person 'no, don't do it. It is a waste of your time and money'...but I don't. I don't want to cause a scene, or start a barrage of backlash from people claiming that it worked for them. Instead, I will present the facts and let you decide for yourself if it is worth doing.
Before I start, I just want to clarify that when I am referring to detox I mean the ones that you buy where you have to take a million various tablets a day and stick to a very restricted diet. If you are going to 'detox' by simply eating healthily then all power to you. That will most definitely do wonders for your body. These detox kits won't. They will produce results; however, the results will be temporary.
Why detoxes don't work
Firstly, the companies who are marketing the detoxes talk about removing toxins that have built up in the body. So, what are these toxins? They don't say. They remain vague and just leave you to let your imagination run wild. Do they mean chemicals, waste products from digestion, bacteria? I guess I imagined it as the waste products from digestion but it would be interesting to hear what other people perceive as the 'toxins' in their bodies.
I read an interesting article on British Beauty Blogger about how Veet gave Chinese women a problem they never had. Chinese women naturally have very little body hair so hair removal products have always been poor sellers. Therefore, Reckitt Benckiser (who own Veet) devised  a marketing campaign to convince Chinese that any body hair is unsightly and released ads equating hair free skin with health, confidence and "shining glory" (the full marketing concept can be read here). I feel that this is the same as what is happening in regards to detoxes. The marketers of the products have convinced us that our bodies are full of these so called 'toxins', from our unhealthy lifestyles, that need to be removed with a detox.