Adults and teens are recommended to do the full cleanse for maximum benefits. It is a 14 day treatment with extra pills for maintenance. You can use the pills as long as you need, just taking a break every 3 weeks for a week to allow a rest.
Kids can just do the drops or the pills but if they have abdominal complaints, the cleanse is advocated. If you just want the drops or pills, taking glutamine can help with healing the lining of the stomach and for getting quicker results. I have neglected to tell many of you that bit of info. If you are buying a kit, you will have glutamine with that and could share with the kids. Glutamine may pose a problem for some and if so, using something like slippery elm or Aloe Vera juice may be a good option. In any case, it is advised to do the glutamine for the 2 week cleanse only, not beyond.
Although it is advisable to eat a diet that will promote a die off, ie no sugars, simple carbs, moldy cheeses, etc, the yeast cleanse will still be effective without doing so. Just a longer process. We know teens aren't going to eliminate much so the fiber part of the cleanse will help with absorbing the junk and getting it out.
Babies can take the drops, even as little as a few weeks. You can put some on their tongue then latch them on to wash it down. Very effective for thrush. Moms can also take this while nursing and it will help the baby.
As far as how far the liquid drops will go? Well, each bottle contains about enough for a 14 day treatment. It is advisable to finish the 14 days and longer if needed. Usually a difficult case of eczema will need the full treatment. So, one bottle per child is recommended.
The capsules are vegetarian for those who asked.
Hope that answers some questions.