You can bet these marketers are making a bundle. Draft your own ads. They should make their point simply. You want the reader to jump on the offer a diet that will cause weight loss painlessly. Don't attempt to pass yourself off as a diet expert.
Food science is a broad and complex field.
Telling people to undertake radical diets is a risky undertaking, because some people can kill themselves if they combine strong willpower with a physiological makeup that you, and even they, may not be aware of. And, wild diets are rarely necessary. The average person needs only some simple pointers. Keep you recommendations mild. Keep in mind that for most people, the quantity of food they eat is the issue.