nutrition and health

There are three supplements

• Zinc

• Vitamin C

• Vitamin D

• Vitamin D3

How much is iu of Vitamin D3 per a day

• 5000~10000

• 1000

• 15

• 60

How many mg of Vitamin C needs per day

• 500

• 60

• 1000

• more and more

Why do not have any problems that everyone can get those supplements

• some people do not need it

• supply chain

• people are rich

• a good policy system

What functions are Zinc doing in the human body

• connective tissue repair

• productive function

• enzymes

• above all