ghk-cu injection human clinical trial FDA scientists flag concerns with peptides as RFK Jr. tries to ease access : NPR “Is GHK-Cu actually worth it?”

In a placebo-controlled trial in 34 healthy individuals, consuming yogurt fortified with 10 billion CFUs of Bifidobacterium animalis subspecies lactis plus 600 mg of the amino acid arginine (a precursor to nitric oxide) daily for 12 weeks improved vascular function and was therefore suggested to reduce atherosclerosis risk

Scholze, P

A 2025 Stanford Medicine study identifying a naturally occurring peptide that suppressed appetite and reduced body weight without the nausea and muscle loss associated with semaglutide confirmed what many clinicians had already observed: the GLP-1 mechanism is powerful, but it carries side effects tied directly to how it works

Talk to a healthcare provider prior to use to balance risks and benefits.