(ANSA-AFP) - FRANKFURT, AUG 29 - German consumers are heading into September feeling more pessimistic than a month earlier, a key survey showed Tuesday, as high food and energy prices and a struggling economy weigh on shoppers' minds. Pollster GfK said its forward-looking survey of around 2,000 people fell to minus 25.5 points for September, erasing the gains made last month when the index climbed slightly to minus 24.6 points. Consumer confidence in Europe's biggest economy "shows no clear trend" at the moment but remains "at a very low level overall", GfK's consumer expert Rolf Buerkl said in a statement. "The chances of a sustained recovery in consumer sentiment before the end of the year are dwindling," he added, blaming "persistently high inflation rates, especially for food and energy". (ANSA-AFP).