Dietary supplements are big business, and on social media it's hard to avoid the ads for the huge range of "healthy" pills and powders available.

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One brand is Juice Plus+, a franchise with 'independent brand advocates' worldwide, some of whom are making questionable claims about the supplement's effectiveness. We asked a dietician to put them to the test...

In response to our report Juice PLUS+ told us: “Our capsule are, unique products that have been sold globally for almost 25 years, are among the most-researched nutritional supplements on the market. Thirty-five peer-reviewed scientific studies, conducted by revered institutions such as King’s College, London and the University of Birmingham, illustrate their many health benefits.

“We certainly do not claim that our capsules have any benefits related to weight loss. We market our products as long-term support for healthy living rather than to cure any specific ailments.

“We recognise that a very small proportion of our 150,000 worldwide, independent brand advocates occasionally stray off-message and we have a department that takes swift, decisive action when we discover it ourselves, or when it is brought to our attention. We are grateful that these violations of our policies were communicated to us and always welcome reports of inappropriate behaviour involving our company and its products.”