Joachim Boldt (born 29 September 1954) is a German anesthesiologist who fabricated or falsified data, including those reporting clinical trial results. Boldt was previously considered to be a leading researcher of medicinal colloids. He was an advocate for the use of colloidal hydroxyethyl starch to boost blood pressure during surgery. However, a meta-analysis of trials that excluded Boldt's fabricated data found that the intravenous use of hydroxyethyl starch is associated with a significant increased risk of death and acute kidney injury compared with other resuscitation solutions. He has been stripped of his professorship and is under criminal investigation for possible forgery of up to 90 research studies.