The cartilages are placed horizontally above each other, separated by narrow intervals. They measure about 4 mm in depth and 1 mm in thickness. Their outer surfaces are flattened in a vertical direction, but the internal are convex, the cartilages being thicker in the middle than at the margins.
A synthetic analog is a: synthetically created compound that differs from the Natural compound. Both in it's structure and function. Although probably very similar to the original compound.
(1 mg = 1,000 mcg)Synthetic melatonin supplement is not a natural sleep aid-it is a man-made hormone designed to mimic melatonin produced by the brain.Since melatonin is a hormone, long-term (more than 3 months) use of synthetic melatonin supplements may have a negative impact on your health. a natural sleep aid-it is a man-made hormone designed to mimic melatonin produced by the brain. 2  Since melatonin is a hormone, long-term (more than 3 months) use of synthetic melatonin supplements may have a negative impact on your health. 3  For this reason, in Europe melatonin is available only with prescription.