Subjects who took the supplement reported an overall drop in their carb cravings compared to the placebo group.
The control group took a placebo, while the experimental subjects took the drug that was being tested.
Research results on the efficacy of St. John's wort have been inconsistent, with some studies finding the herb to be as effective as selective serotonin reuptake inhibitors (SSRIs) and others finding it no more effective than a placebo.
A 1998 study of 29,133 male smokers in Finland showed 32% less cases of prostate cancer and 40% less deaths from prostate cancer among men who took vitamin E to prevent lung cancer compared to men who took a placebo.
The pill is taken for 21 consecutive days of the menstrual cycle followed by a 'placebo' pill for 7 days, during which time menstruation occurs.Combination pills are not recommended for women who wish to breastfeed.
It's difficult to measure the effectiveness of this weight loss approach in scientific studies because there is some evidence to suggest an element of placebo affect occurs when certain people are hypnotized.
Weight loss is evident among patients taking the Ionamin diet pill in conjunction with following a calorie-resticted diet compared to patients given a placebo and following the same dietary plan.
Monophasic pills don't change the levels of progestin and estrogen that you receive throughout the course of a month, except for during the use of the placebo pills at the end of each packet.
Food allergen provocation tests require abstinence from the suspect allergen for two weeks or more, followed by ingestion of a measured amount of the test substance administered as an opaque capsule along with a placebo control.
One German study found that a cream made with an extract of St. John's wort relieved the symptoms of AD better than a placebo, but the herbal preparation had not as of 2004 been compared to a standard corticosteroid cream.