The Effects of Metabolic & Bariatric Surgery on Lipid Metabolism, Myeloid-Derived Suppressor Cells, and Cancer Cell Biology

For an eligible subject, all the following must be answered "yes":

• Biological female sex
• Age >=35 and <=60 years (including pre- and postmenopausal)
• Self-reported white or black race
• The study will enroll approximately 50% white and 50% black subjects
• Body mass index >/=40 kg/m2
• Planned to have bariatric surgery or post-bariatric surgery
• Ability to provide written informed consent
• Allow the collection and storage of biospecimens and data for future use
• Not having yet started the pre-op liquid diet before the bariatric surgery

For an eligible subject, all the following must be answered "no":

• Have type one diabetes
• Use of anti-inflammatory medications, such as glucocorticoids or non-steroidal anti-inflammatory medications, within the past 15 days
• History of cancer of any type
• History of chronic conditions known to cause inflammation, such as tuberculosis, autoimmune disease, and human immunodeficiency virus
• An acute history (within the past 60 days) or confirmed or suspected SARS-CoV-2 (COVID-19) infection
• Currently pregnant, breastfeeding, or planning to become pregnant within the next 52 weeks
• Currently participating in another study with competing outcomes
• Any other situation that, in the opinion of the investigator, would negatively impact subject safety or successful compliance with the protocol