Here's an excerpt from their Products page:
Patients may encounter transient vomiting, diarrhea, with black, green or yellow color stool, occasional sleep disturbances may happen while under treatment. To some patient, this healing crisis may not occur right away. Good effect can be felt in one week to 3 weeks of Boston-C treatment. There were patients who recovered faster due to their strong immune system while it takes time for the seiously ill cancer patients to recover. Duration therapy will depend largely on the condition of the patient and their attitude, faith and compliance to the dosage. Most patients may have fully recover in 3-6 months while other takes a longer time. What is important is the patient is recuperating. All patients are advice to eat 3x a day or more, drink 8 glasses of water a day, take enough sleep at least 8 hours a day. One hour after breakfast and one hour in the afternoon. Take one hour nap after breakfast and one hour nap in the afternoon this - take cold bath in the morning and at night. Pray, use the power of prayer. Do it everyday. Ask for forgiveness, guidance and blessings. Pray hard before going to bed at night and after you wake up in the morning and before drinking boston c herb, pray also before having your meals. Singing and dancing make your mood lively do it anytime you are free. Go out watch a movie, concert or Mall tours. write a short story, write a note to a special someone or plant a tree, make your own garden, or choose a pet. Make yourself busy everyday. Call your relatives, friends for morale support. Dish out some jokes and laugh, meditate for one hour everyday. Go into sports, work out in the gym, visit beautiful places, read books that will help you strengthen your emotions. Forget your worries. This things shall pass and so with us.
Enjoy life for it is too short to live with.
My opinion: No scientific basis for their claims. We could not and should not rely in mere testimonies. And the products cost so much.