I'm surprised honestly, I've been sticking to domestic gear because I figured it'd be sterile and clean, but this has definitely raised some concerns.
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I guess I'll stick with Chinese oils and just filter them myself as there seems to be no point in paying three times as much for something I still have to worry about and filter anyway.
I think there may be different levels/kinds of risk attached to highly reputable, long-standing domestic sources vs. Chinese TLA sources. There are concerns beyond contamination that may have meaningful differences between types and tiers of sources.
1. Reputation at risk is the only real leverage we have. A source who’s getting business based on hard-earned reputation has something to lose. Chinese and domestic sources without a lot of reputational equity at stake have nothing to lose. They can just disappear and rebrand every few months, and maybe even make a little extra on an exit scam in the process.
2. Cheaper sources appear to get away with more and get held accountable for less, overall. Cheaper sources may also have less budget to do things “right”, e.g. they may re-use filters beyond their useful life, or not have the money to invest in needed lab gear and supplies.
3. Domestic sources appear mostly to be brewers of their own gear, whereas these Chinese sources are often resellers without much insight into the production of the final product. So they can lie or just be wrong about the contents, production process, and everything else we’d like to know.
4. Chinese resellers of unbranded oils may be selling product from different producers from one day to the next, so what was true yesterday is not necessarily true today.
You might have a reasonable argument that gear from an experienced domestic source with an excellent reputation is likely to be of better quality on average.
All that said, to my knowledge,
no source has ever demonstrated the kinds of organization, technology, processes, controls, internal and external oversight that would lead one to conclude that they will never ship contaminated products, at least occasionally. Or that contaminated products will be identified and recalled after shipping to reduce the customer impact. Or that any domestic source could afford to do all that at the volumes they’re likely to be selling.
I mean - we wash our fruits and vegetables to remove the pesticides and other unsavory substances. Doesn’t matter where the fruit’s from. Why wouldn’t we filter our oils?