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The honest, current picture is more nuanced

10.1152/japplphysiol.00935.2015 56 HeJ.WangM.YangL.XinH.BianF.JiangG.et al (2022)

Pemetrexed administered intraperitoneally at doses of 0.1 mg/kg/day to male mice (approximately 0.0006 times the recommended human dose based on BSA) resulted in reduced fertility, hypospermia, and testicular atrophy

Beutler and his team thus proved that one of the mammalian Toll-like receptors, TLR4, acts as the membrane-spanning component of the mammalian LPS receptor complex

Let's see why: First, it's really stable and easy to formulate, so the problems that come with pure vitamin C are solved here