It is a designation used primarily by the FDA (Food and Drug Administration) for products, often in vitro diagnostic (IVD) components like reagents or instruments, that are in the laboratory research phase of development and are not intended for clinical diagnostic use
Vitamin B12 is an essential nutrient that plays a vital role in the normal functioning of the brain and nervous system, supports the formation of healthy red blood cells, and is crucial for effective metabolic processes, including the conversion of food into energy
Chen K, Li Y, Guo Z, Zeng Y, Zhang W, Wang H
This is a mechanism-level description of a research compound, not a statement of proven clinical benefit in humans
The liposomal encapsulation shields glutathione from degradation and improves its bioavailability (Kidd, 2011)