“Effect of cocoa liquor supplementation on biochemical markers in patients with type 2 diabetes mellitus: a randomized clinical trial” – published in the journal “Nutrición Hospitalaria” in 2018. The PubMed link you provided appears to lead to a summary of this research article, which investigated the impact of cocoa liquor supplementation on various biochemical markers in patients with type 2 diabetes mellitus. Based on the information available in the summary, I have created a title for the article that accurately reflects its content.