Nutraceuticals and skin appearance: Is there any evidence to support the claims?

Posted 15 February 2018

“The rise of the nutraceutical market, specifically oral nutrition supplements claiming to improve skin appearance, is striking. This paper aims to examine the published scientific evidence for beneficial effects of nutraceuticals on skin appearance. An overview of skin physiology and intrinsic and extrinsic ageing is provided which underlies the potential physiological processes nutraceuticals purport to counter”.

“Current evidence for those without existing authorised claims (e.g. green tea extract, pomegranate extract, carotenoids, evening primrose oil, borage oil, fish oil, collagen and co-enzyme Q10) is reviewed, focussing primarily on evidence from randomised controlled trials where available, in relation to skin parameters including wrinkles and hydration”. 

“To date, the evidence for many ingredients in relation to skin appearance is limited, not sufficiently robust and/or inconsistent. Although there are a small number of human studies suggesting a potential benefit and some plausible biological mechanisms, much of the evidence Read the rest

Health Canada toughens green tea extract warnings

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

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

How not to lose weight: Green tea extracts

Posted 07 February 2017

 (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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Liver toxicity related to herbs and dietary supplements: Online table of case reports.

Posted 07 November 2016

[quote]Over the past 50 years, approximately 19 herbs (minus germander and usnic acid that are no longer sold) and 13 dietary supplements (minus the six no longer sold and vitamin A & niacin due to excess) posed a possible risk for liver injures in certain individuals. The top three herbs with the most number of reported publications (but not cases studies) in descending order, were germander, black cohosh, kava extract, and green tea extract.[/quote]
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