Key points from article :
Some of the ingredients in herbal products could decrease the efficacy of cancer treatment.
Garlic, ginger and ginkgo pills can delay the healing of skin wounds when breast cancer spreads.
There was no evidence that herbal therapies or creams worked.
Doctors need to proactively ask patients what else they are taking during cancer treatment.
Patients should always check with their doctors before trying complementary therapies.
Many products can interfere with hormone therapy, chemotherapy and blood clotting.
