But only one major study in people with heart disease has shown a benefit from antioxidants.
(2) Valerian has shown a benefit in some, but not all clinical trials.
Of course, it is also possible that the trials weren't large enough or didn't last long enough to have shown a benefit from fish oil.
Study designs varied substantially, which could explain the differences in outcome, and no treatment has shown a benefit over conventional radiotherapy.
Several randomized trials have shown a benefit of dose escalation to 78 to 79 Gy for men treated with external radiation for localized prostate cancer.
Randomized, controlled trials have clearly shown a benefit for patients treated with apheresis who have Guillain-Barre syndrome and patients who have thrombotic thrombocytopenic purpura.
Studies supporting this combination therapy have shown a benefit in patients with locally advanced disease based on the relatively short follow-up time to report, to date.
In the case of LDL-cholesterol and mortality, RCTs of statins (which reduce LDL-cholesterol) have consistently shown a benefit on risk of major vascular events, even in people at low absolute risk of these events.
Studies show that all of these strains are associated with reducing diarrhea; LGG, among the most studied, has also shown a benefit in treating atopic eczema and milk allergy in infants and children, according to a 2008 report in The Journal of Clinical Gastroenterology.
Dr. Manoj Kumar, a neonatologist at Stollery Children's Hospital in Edmonton, Alberta, said that while "studies have shown a benefit in heart rate and respiratory rate," it is unclear whether that prompts clinical improvements, like removing oxygen or feeding tubes sooner, questions that the Pediatrics study did not tackle.
Other groups have shown a benefit to using Steinmann pin constructs to fix proximal tibia defects.
