A new meta-study from the Australian research team looked at more than 50 placebo-controlled trials that have emerged over the past 20 years to test the effectiveness of herbal weight loss,media reported. The results suggest that herbal supplements are largely ineffective in helping to lose weight, and senior authors of the study say the treatment is largely a waste of money for people who lose weight.
This new meta-analysis provides the first systematic review of research on herbal medicine and weight loss in nearly 20 years. The study collected data from 54 groups of randomized placebo-controlled trials.
It is understood that the analysis is focused only on herbs made up of pure plants or pure plant combinations, so diet-loss mixtures such as vegetable oils, fibers and protein supplements are not included.
Nick Fuller, senior author of the new study, said: “The problem with supplements is that, unlike drugs, they do not require clinical evidence until they are sold to the public in supermarkets or pharmacies. “
The meta-study found that the results published in many of the reviewed trials were statistically significant, but not clinically significant. The clinical significance threshold for this study was set at the end of the trial to reduce weight by 2.5 kg or more.
Fuller said: “This finding suggests that there is not enough evidence to recommend a particular herd for weight loss, and that many studies have had poor research methods or reports, and that while most supplements may seem safe for short-term intake, they are expensive and do not have clinically significant weight loss effects,” Fuller said. “
Fuller told the media that the herbal weight-loss drugs were largely a “waste of money.” He points out that despite decades of clinical studies, their research shows that they have no evidence that they are effective.
The study was specifically targeted at four weight-loss drugs that often appear edgy pills, either alone or in dosage forms: Camellia Sinensis (green tea), Garcinia Cambogia (Malabaro), Phaseolus vulgaris (white beans) and Ephedra sinica (herb jaundice).
Green tea was the most frequently used supplement in clinical studies, and was investigated in 12 clinical trials. Seven of the trials treated green tea as a single herbal supplement, and meta-analysis of the seven trials showed that green tea had no weight loss effect compared to placebos.
MalabarRonosis is the second most commonly used herbal supplement, tested in 11 clinical trials. Of the 11 trials, 10 found method errors and a higher risk of bias. Despite biases and errors, meta-studies have found that Marabara is not effective at weight loss, either as a single herb or as an element of a more complex supplement.
In the end, although meta-studies showed that some of the herbs reviewed did result in a small amount of weight loss compared to placebos, they could not be considered clinical. So even if you lose two to three pounds by taking these herbs over the course of a few months, it’s basically a paltry weight loss, and people don’t deserve to pay for it.
The study was published in Diabetes, Obesity and Metabolism.