Which? magazine claims that companies are testing cosmetic fillers in the UK before applying for a US licence under more stringent rules.
Only seven fillers - injectable substances used to reduce wrinkles - containing hyaluronic acid are licensed in the US compared with 65 in the UK.
Government regulators are currently reviewing the situation. Every year around 400,000 people undergo non-surgical cosmetic treatments such as fillers, a figure which is increasing.

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