The present invention relates to corn starches having an apparent amylose content between 15% by weight and 40% by weight and a content of rapidly digestible starch between 5% by weight and 25% by weight, and also corn flours and foods comprising these corn starches or corn flours. In addition, the present invention relates to processes for producing said corn starches/corn flours. In addition the present invention relates to processes for producing said corn starches/corn flours and use thereof as resistant starch, as prebiotic or for producing foods having a decreased glycemic index.