Use of the fat burning supplement Dexaprine, which was banned in the Netherlands and the United Kingdom last week over concerns that the product may contain an ingredient purported to cause life-threatening conditions, has been reinstated in the United Kingdom after the California company that makes it reportedly produced a U.K.-specific formulation. Sold mainly online in the two countries, Dexaprine, which contains a proprietary blend plus green tea, acacia and citrus extracts and caffeine, has been linked to side effects such as severe nausea, headaches, heart palpitations, and in one case, cardiac arrest. Following its ban, the U.K. Foods Standards Agency issued a warning about fat-burning products and noted the deaths of two people believed to have taken such products. The agency did not disclose the products in question, but said that they contained DNP (2,4 dinitrophenol), an industry chemical known to have “serious short-term and long-term effects, which can be extremely dangerous to human health.”

The U.K. Medicines and Healthcare products Regulatory Agency said that the reformulated version of the product—which does not include any medicinal ingredients—can stay on the market, pending results of further laboratory analyses. See, August 23, 2013;, August 21 and 26, 2013.