interesting, do you think there's any reason to be concerned about quality and purity issues because it's based in China?
Obviously it's a concern, and I have no way of knowing for certain... but they seem to trying to be a quality supplier to individuals and 3rd party vendors. As such, it would not make much sense to be boasting of making 2 tons of quality NMN/month to sell and then make inferior product.
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From their website https://www.uthever.com/about-uthever/
Above 99% Pure NMN. UtheverTM from Effepharm has the highest purity in the market – fewer impurities especially endotoxins. UtheverTM is popular among our buyers in the United States and Europe.
USP Standard Confirmed by Intertek. Effepharm strictly follows USP and FDA Guideline to ensure 100% quality proven experienced production. EffePharm supplies authentic UtheverTM with a purity that was confirmed by an international third party — Intertek.
Safety and efficacy tests. To top it off, at Effepharm, animal tests and clinical trials on UtheverTM are being conducted. We’ve launched a project encouraging R&D institutes and nutritionists to get free UtheverTM samples as well as funding from Effepharm — we’re that confident in our safety and efficacy.