There are many manufacturers for peptides now and they are mostly for research purposes only. The number of companies that manufacture drug have increased over time. There are some trusted online vendors like American Science Labs where you can buy them from. There are also other suppliers and you can go ahead and make comparisons before buying one. Peptides even though only for research if bought cheaply cannot have the necessary outcome that you expect when conducting the research. Therefore, understanding the quality and choosing a right vendor is very important for your research to be successful. There are lots of research papers such as the one here, https://www.ncbi.nlm.nih.gov/pubmed/9156038 that has been published online to understand the effect of using peptides.
One of the first points to be considered is the amount or the milligrams of peptides you are buying. Therefore, ensure that the company you have chosen quotes the right prices for the quantity of peptides you have chosen. The research materials should be sustainable enough for conducting the research. Therefore, have necessary information must be kept at hand all times before deciding to buy. Some peptides are intended to be used on live samples such as animals and some can be used on tissues only. It is important to understand how you are going to use it before buying it.
Using research peptides on animals such as rodents or pigs should undergo the necessary sterilization process to ensure that you get accurate results. Knowing how to store and use the peptides is vital before even buying it. Storing them right will keep the chemical combinations intact and the results will be accurate as well. Otherwise, it can create vast different in the results that are expected out of the research you are conducting. Likewise handling the peptides and using the right methods for injecting them or testing them on animals must be learned as well so that you can get proper results.
There are two methods using which you can check if the peptides can stand longer. One of them is to make sure that the lid of the vial in which the peptide is stored is sealed properly. Another technique is to check if they can be stored in low temperature without making any difference to the quality or the components that comprise of the peptide. The peptides that are used for research purposes should not be frozen or thawed. Because using the vial at room temperatures and then freezing them can affect on how active they can be and how long they will be effective.
Peptides are very sensitive to temperature changes and they must be stored at 2-8 degree Celsius. They should not be exposed to any direct sunlight and only the amount that is required for the research must be extracted and the remaining must be put back in storage immediately. Different countries have different laws on how to handle the peptides. Therefore, please ensure that you are buying them from a reliable supplier that uses proper practices for storing them. Take into consideration the shipment time as well since being in the shipping stage for a long time can affect the quality of the peptides.