Low levels of the amino acid arginine are associated with a number of diseases, including colon cancer. Building on earlier work, researchers have discovered that an arginine-deficient diet stalls the production of the MHC-1 protein, which alerts the immune system to dangers such as a mutating cell or an invading virus. However, increasing arginine levels through diet boosts the number of MHC-I proteins, which suppresses colorectal tumors and enhances immunity to the flu and Covid.

What if cancer screening no longer had to look for one cancer at a time? Cancer screening has long followed a one-organ-at-a-time model: mammography for breast cancer, colonoscopy for colorectal cancer, low-dose CT for lung cancer, and cervical testing for cervical cancer. These programs save lives, but they also leave gaps. Many cancers still lack routine screening, while patients often face multiple appointments, tests, and follow-up procedures.