[Misc] Skincare experts, what are your thoughts about vitamin C serums and their derivates?

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Hello everyone, so I've come across a review lately which seemed to have been very well researched and I wanted to know what you guys think about it.The reviewer claimed: "If vitamin C serums are discussed, one has to differentiate between the pure ascorbic acid and its derivates. One one side, the vitamin derivates have the advantage of often being more stable, biodegradable, and gentle to the skin. On the other side it can be said that they don't improve collagen synthesis not nearly as well as ascorbic acid"Then they went on to mention the differences, pros and cons of pure Ascorbic Acid as well as the derivates Sodium Ascorbyl Phosphate and Magnesium Ascorbyl Phosphate. In the end they claimed SAP was really great for weakening pigmentation and preventing akne, but it fared worse in terms of collagen synthesis compared to AA and MAPConsidering I'm not nearly as experienced on the topic as most of you here, I'd really appreciate some input about this from you experts :)
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Submitted by General_Kenobi896