Vitamin C — research review 3

...so Vitamin C, we know it's a potent antioxidant. It actively scavenges reactive oxygen species in the watery parts of our cells, protecting against oxidative damage. It's also a critical cofactor for collagen synthesis, essential for skin, blood vessels, and bone.

Right. And there’s a lot of research on it. For instance, a meta-analysis in Journal of the American College of Nutrition in 2011 highlighted its role in immune function, though largely from observational studies or trials in deficient populations. But what about the bigger picture for longevity?

That's where it gets interesting, and frankly, a bit more speculative. We have solid evidence for its fundamental roles, like the antioxidant action and collagen support. But demonstrating a direct, causal link between supplemental Vitamin C in already healthy individuals and extended human lifespan? That's still genuinely unproven.

Exactly. The human body is complex. Just because something is good, doesn't mean more is always better, or that supplementing it will extend lifespan beyond what a balanced diet provides. What about its specific impact on age-related diseases?

We know oxidative stress contributes to aging and many age-related conditions. So, it's a logical hypothesis that an antioxidant like Vitamin C could play a role. However, large-scale, long-term human intervention trials specifically designed to prove Vitamin C supplementation significantly reduces the incidence of specific age-related diseases or overall mortality in non-deficient populations are still lacking or have yielded mixed results.

So, while we understand its fundamental biology, the direct impact of high-dose Vitamin C on extending healthy human lifespan or preventing age-related decline in well-nourished people is still an open question.