5MCG means 5 micrograms, 1 micrograms is 1mg, and 1 mg is 1 mg.

IU is short for international unit. Vitamins, hormones and so on will use this unit. But different substances have different conversion methods. The label here means that 5 micrograms of vitamin D3 can also be labeled as 2IU vitamin D3.

but it doesn't mean. 2IU is equal to 5 micrograms. It depends on what substance it is. For convenience, we non-professionals can directly refer to the requirements of IU in the instruction manual to judge whether the content of a specific substance is enough. Or just look at ordinary weight units such as micrograms and milligrams.

GNC is proud to be the No.1 nutrition brand in the United States, and pursues the certification of all products by the National Safety and Health Foundation of the United States. The National Foundation for Safety and Health is an independent non-profit organization.

responsible for issuing certificates and setting standards, including helping to supervise the quality of food, water, air and consumer goods. Work closely with GNC to ensure that GNC brand production facilities and products meet the strict requirements of independent inspection and verification procedures of the National Safety and Health Foundation of the United States. In 211, Sidu Mall cooperated with it and became a legal distributor.