In 2016, Jesse Karmazin launched Ambrosia, a startup offering young plasma infusions to paying clients at $8,000 per liter. The donor pool consisted of individuals aged 16 to 25. The recipient pool consisted of individuals aged 35 and older who could pay. The company operated out of clinical facilities in several U.S. cities, collected plasma from young donors through existing blood banking infrastructure, and infused it into older recipients. The scientific premise drew from the heterochronic parabiosis research documented in LG-001 — the demonstrated rejuvenation of aged tissues when exposed to young circulating factors. The commercial premise was simpler: people with money would pay for access to a procedure that the peer-reviewed literature made biologically plausible, regardless of whether clinical trials had validated the specific intervention being sold.
On February 19, 2019, the FDA issued a formal warning. The language was direct: "Simply put, we're concerned that some patients are being preyed upon by unscrupulous actors touting treatments of plasma from young donors as cures and remedies. Such treatments have no proven clinical benefits for the uses for which these clinics are advertising them and are potentially harmful." The statement specified that plasma infusions for anti-aging purposes should occur only "within clinical trials with appropriate institutional review board (IRB) oversight." The FDA did not issue a cease-and-desist order. It did not initiate enforcement proceedings. It issued a safety communication — a public statement of concern with no binding legal force on the underlying procedure.
Hours after the FDA warning, Ambrosia announced it had ceased patient treatments. The announcement appeared to represent compliance with the regulatory signal. Weeks later, operations resumed — first under the name "Ivy Plasma," then reverting to the Ambrosia brand. The price remained $8,000 per liter. The donor age range remained 16 to 25. The recipients remained the same demographic. The locations remained the same. What changed was the framing: Ambrosia no longer made specific anti-aging health claims in its marketing materials. The procedure itself — collecting plasma from young donors and infusing it into older paying clients — continued. The FDA's public warning and the company's subsequent continuation under its own name, at its original price, constitute the most documented specimen of the regulatory gap this paper examines.