I've read this advice for 30 years now. There's never enough research for vitamins. If statins had similar results, there would be an advertising push starting tomorrow.
the truth is that massive iv infusions of vitamin c have cured many types of diseases. Dr Klenner was a pioneer with that therapy and there are many natural health doctors healing people that way today. It is not understood and maligned by much of the medical establishment. Not a huge profit margin in it. Check out the vitamin c foundations website for the many amazing cures gotten with vitamin c therapy.