NUTRIJA N-Acetyl Cysteine (NAC) is USP Grade and free of flavors & fillers thus you get 100% contents of N-Acetyl Cysteine. We source N-Acetyl Cysteine (NAC) in India from USA based reputed GMP certified facility. With NUTRIJA N-Acetyl Cysteine you can take effective dosage as needed in comparison to other N-Acetyl Cysteine supplement brands you see they contains N-Acetyl Cysteine (NAC) at very low doses (mg), you need to take necessary effective dosage to get the desired effect. Note : N-Acetyl Cysteine may have a "Sulfuric" odor, which is normal and does not indicate a problem.