The Difference Between Keitai and Mepsin

Thymosin a1 I know there are 3 kinds, one is Nidaxian more than 700, one is Maipu new about 150 like, there is also Kittai is 150, the quality is actually almost the same, the domestic cost-effective to a lot of good, which Kittai preservation method is a little bit strict to be refrigerated at 3 degrees Celsius, the first 2 seems to be as long as 20 degrees under the light on the good, Thymosin a1 belongs to the multi-molecular peptide chain, the more stringent preservation requirements, the more impurities, so I personally feel that the first 2 to be better. Thymosin a1 is a multi-molecule peptide chain, the stricter the preservation requirements means that the more impurities, so I personally feel that the first 2 kinds are better. And you said the other more than 10 dollars should be ordinary thymus peptide, and thymus peptide a1 is not a thing, my answer can be satisfied?