What would be the most direct result if NAG (N-acetylglucosamine acid) could not be synthesized?

NAG(N-acetylglucosamine acid) - This process acts as a secondary amide in the middle of acetic acid and glucosamine. 

• This is also known as a derivative of Monosaccharide Glucose.

Uses-: It can be useful as follows-:

• N-acetylglucosamine acid generally uses in the dietary supplements in order to maintain and promote the strength to bone joints and cartilages.
• It also helps to reduce the skin type troubles like skin pigmentation by holding back the melanin production and protects the skin cells from oxidative stress .
• NAG is also useful to reduce the joint pain by lowering the synovial inflammation or swelling.