People are being warned against buying "dangerous" herbal slimming aids online.
The Medicines and Healthcare products Regulatory Agency (MHRA) said there were concerns about some products, including Instant Slim and Sport Burner, being sold on websites and shipped around the world. Some contain the prescription-only drug sibutramine, which has been withdrawn across Europe due to an increased risk of heart attacks and strokes.
Safety warnings about herbal slimming aids have been issued by several international agencies.
The Swedish Medical Products Agency has issued warnings over Slimline Soft Gel, Acai Berry ABC, Hygia Fit, Sport Burner, Health Slimming Coffee, Instant Slim, 3X Slimming Powder, Li D Daidaihua and Botanical Slimming.