Tag Archives | Green tea

Evidence lacking for “alternative” weight-loss therapies

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Posted 07 July 2021

A systematic review of published research evaluating the efficacy of dietary supplements and “alternative therapies” for weight loss among people at least 18 years of age has found that supportive evidence is weak. Many clinical trials were also hampered by a significant risk of bias due to inconsistent testing methods. Problems with studies include small sample sizes, short follow-up periods, and poor study designs.
Reference: Batsis JA. A systematic review of dietary supplements and alternative therapies for weight loss. Obesity, June 23, 2021

Key findings included:

  • Out of 315 randomized controlled trials included in the review, 52 were classified as having a low risk of bias, of which 16 demonstrated significant weight changes for tested therapies compared to placebo.
  • No high-quality evidence supported acupuncture, calcium-vitamin D supplementation, chocolate/cocoa, phenylpropanolamineguar gumPhaseolus vulgarispyruvate, and mind-body interventions as weight-loss
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‘The food supplement that ruined my liver’ -Green tea capsules

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Posted 28 October 2018

Jim McCants took green tea capsules in a drive to get healthy in middle age. His doctors now say they left him needing an urgent liver transplant, writes the BBC’s Tristan Quinn.

BBC News

It should have been one of the happiest days of his life. But Jim McCants looks back on his youngest son’s high school graduation with mixed emotions. As he sat down next to his wife Cathleen in the university auditorium, just outside Dallas, Texas, she turned to look at him.

“She said ‘Do you feel OK?'” Jim recalls. “I said, ‘Yeah I feel fine, why?’ ‘Your face is yellow, your eyes are yellow, you look terrible.’ When I looked in the mirror it was shocking.”

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5 supplements that claim to speed up weight loss – and what the science says

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Posted 31 January 2018

From The Conversation

When you google “weight loss” the challenge to sort fact from fiction begins. These five supplements claim to speed up weight loss, but let’s see what the evidence says (for raspberry ketones, Matcha green tea powder, Garcinia cambogia supplements, caffeine supplements, and alkaline water)

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Science or Snake Oil: do skinny teas boost weight loss?

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Posted 18 December 2017

From The Conversation:

Weight loss teas are becoming common, with advertisements claiming dramatic results often appearing online. Do the big promises match the results, or do they only match the price tag?

A search of the medical research database pubmed found there are no studies specifically on the use of “slimming teas” for weight loss, but there are studies on green and black tea.

One review of five research trials compared changes in body weight in more than 300 adults at high risk of type 2 diabetes and heart disease. They gave people either green tea, a fermented tea called Puehr or tea extracts and compared the weight change to people who were given either placebo (non-active) tea extracts or no tea at all.

Continue reading at The Conversation

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Health Canada toughens green tea extract warnings

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Posted 17 November 2017

‘Cases of liver injury continue to be reported in Canada and worldwide,’ safety review says

By David Common, CBC News Posted: Nov 15, 2017 7:31 PM ET

http://www.cbc.ca/news/health/health-canada-green-tea-extract-cbc-marketplace-1.4404054

Health Canada is ordering a more explicit warning on labels of green tea extract products over concerns about the risk of liver injury. The over-the-counter pills have become a popular option for those seeking to lose weight.

The change follows a federal safety review, prompted after Madeline Papineau, a 17-year-old in Cornwall, Ont., took the extract and quickly developed liver and kidney injury. Doctors were initially stumped by the damage, until the teen’s sister mentioned she’d been taking a diet supplement.

Health Canada says the risk of liver injury has been noted on the labels of products containing green tea extract since 2008. But on Wednesday the agency announced it was “clarifying warnings” by asking manufacturers to Read the rest

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How not to lose weight: Green tea extracts

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Posted 07 February 2017


We
 (Canadian Broadcasting Corporation Marketplace) investigate popular green tea weight loss supplements and uncover dozens of reports of liver failure. 

Diet pills with natural ingredients are part of a booming multi-million dollar weight-loss industry in Canada. But are they a waste of money? And are they always safe?

Watch the video here

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AHA Warning: Some Supplements can Worsen Heart Failure

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Posted 11 August 2016

In a new scientific statement citing Natural Medicines, the American Heart Association (AHA) warns against the use of many supplements in people with heart failure. St. John’s wort, grapefruit juice, ginsenghawthorn, danshen, black cohosh, and green tea are among those discussed for their potential to cause significant interactions with commonly used heart failure medications. Other natural medicines, including aconitegossypol, licorice, and yohimbine are noted for their potential to cause harmful cardiovascular effects, including high blood pressure and decreased heart rate. Ephedra, a banned substance in the US, is also warned against as it raises blood pressure, can stimulate the heart, and make chest pain and irregular heartbeat worse.

For more details on specific drug interactions associated with these supplements, please review our scientific monographs on each product, or try our interaction checker.Read the rest

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Liver failure and transplant needed after supplement use

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Posted 06 April 2016

According to a new report, a 26-year-old otherwise healthy Australian man required a liver transplantation following the use of two dietary supplements. The patient had taken a whey protein powder containing green tea and many other ingredients, as well as a weight loss supplement containing 70% Garcinia cambogia for one week. Analytic testing did not identify any contaminants.

In 2009, there were at least 40 cases of liver injury in the U.S. following the use of Hydroxycut weight loss products. The formulation of Hydroxycut products varied, but most of those associated with liver problems contained Garcinia cambogia and green tea. The Norwegian food safety authority has also issued a warning about green tea extract supplements following multiple reports of liver damage.

Reference:
Smith RJ, Bertilone C, Robertson AG. Fulminant liver failure and transplantation after use of dietary supplements. Med J Aust. 2016 Jan 18;204(1):30-2… Read the rest

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Diet supplements threat to liver

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Posted 25 January 2016

From the Medical Journal Australia:

CLINICIANS have been warned to be alert to the possible role of herbal and dietary supplements in cases of hepatotoxicity in the wake of a West Australian man experiencing severe drug-induced liver injury (DILI) after taking a protein and weight loss supplement.

A case report published in the Medical Journal of Australia outlined the experience of a 26-year-old Indigenous man who presented with severe liver injury 10 weeks after taking a whey protein supplement containing green tea extract as well as a dietary supplement containing Garcinia cambogia for just 1 week. The researchers reported that the patient had no previous medical history, did not drink to excess, was not taking medications regularly, and did not smoke or use illicit substances.

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