I've always injected "cold" and never had an issue. Not that it couldn't happen. But I've also not bought from Amo either, and don't ever plan to. IMO, there are better options.
To whoever said Amo is unheard of outside this forum... That's just not true. Amopure, fka Amopeptide, has been around for a while, and are well known in the Peppys community. They had over 300 reviews in the testing server before it got nuked a couple months ago... Or whenever it was.
@dionysos is definitely not affiliated with Amo and he is not shilling. He, and others, do extensive research and track a number of vendors, to the best of their ability. No one is perfect and he has helped hundreds, if not a thousand or more, people. He "might" be a bit biased towards the vendors he has used successfully, as most anyone else would be.
Those spreadsheets are not carved in stone! They can change in an instant. There can be issues that we don't hear about for a month or more, potentially affecting many people before it can be updated. They don't get changed because 1-2 people make a claim that can't be validated or might be caused by something else, like old/bad bac water, unsterile needles, user error, etc.
If you read the disclaimers, rules, and introduction to this forum, you know that NO vendor is 100%, (arguably) not endorsed by the forum, and each and every person is solely responsible for their research and decisions. If you choose to come in here, go straight to his spreadsheets, and use that as your only source of information, then you get what you get!
Pretty sure there is a disclaimer right on the spreadsheet similar to this.
Many people seem to disregard the numerous disclaimers in this community. If you make the choice to inject a research product that's not FDA approved for human use, then you can't really complain when things go wrong and you have no one to blame but yourself.
There is more than enough info in here to lead you to numerous buying options. You can filter, you can test, you can get into buying groups that include free testing and shipping with the purchase, you can buy domestic, you can buy name brand, you can join testing groups, you can look over thousands of tests from dozens of vendors. There are numerous options. If you choose to buy the first thing that comes along, because you like the price, it arrives fast, joe blow said so, and you choose to not filter, to not test, then you get what you put into it.
If I had injection site reactions, the first things I would do is replace all my supplies and filter the product, to rule out every other variable. It's research, proceed accordingly.
What blows my mind is that some of the people participating in this thread, still choose to buy from Amo... And spend considerable time arguing that, when the time could be better spent - researching the endless supply of information spread across 8-10 platforms.
My suggestion - spend more time reading and less time typing.