The scientific studies to support our claims on aged Vitamin C are published in the following peer-reviewed journals:
Study: A critical review of Vitamin C for the prevention of age-related cognitive decline and Alzheimer’s disease
What the study looked at:
People have long believed that antioxidants like vitamin C can help protect the brain from damage that leads to Alzheimer’s disease and age-related memory loss. But not all studies agree on this — the results have been mixed.
Why some studies are unclear:
Many studies don’t measure actual vitamin C levels in the blood, which makes it hard to know if participants were really low or not.
Food diaries used to estimate vitamin C intake can be inaccurate.
There’s a limit to how much vitamin C the body can absorb at one time — it uses a special transporter (called SVCT1) that can only carry so much.
So, taking very high doses or extra supplements might not help as much as people think, because the body can’t always absorb more than it needs.
What the researchers concluded:
There's a lot of evidence that having healthy levels of vitamin C in the body helps protect the brain as we age.
But the real benefit comes from avoiding vitamin C deficiency, rather than taking big doses of supplements if you’re already getting enough from your diet.
Why it matters:
This review helps clarify that maintaining normal vitamin C levels — not megadosing — is key to supporting brain health and reducing the risk of cognitive decline.
Study: A comprehensive review and recent advances of vitamin C: Overview, functions, sources, applications, market survey and processes
What the paper covers:
It explains how vitamin C works, where it’s used, and how much people need each day.
Worryingly, about 40% of people in the U.S. — and many in Asia and Africa — don’t get enough vitamin C.
It also looks at new ways to deliver vitamin C (like special capsules or skincare tech) to keep it stable and effective.
Why it matters:
This review highlights the huge global demand for vitamin C, the need for better manufacturing and delivery methods, and the ongoing problem of vitamin C deficiency — even in wealthy countries.
Study: Antioxidant vitamins intake and the risk of coronary heart disease: meta-analysis of cohort studies
What the study looked at:
Researchers wanted to know if taking antioxidant vitamins like vitamin C helps lower the risk of coronary heart disease (CHD), which includes heart attacks and blocked arteries.
How they studied it:
They didn’t run a new experiment — instead, they looked at data from 15 long-term studies involving over 374,000 people. These studies followed people for 8 to 15 years to see who developed heart disease and how that related to their vitamin intake.
What they found:
People who had the highest levels of these vitamins were less likely to get heart disease compared to those with the lowest levels.
Vitamin C: 16% lower risk
Dietary vitamin C (from food) showed a protective link.
What it means:
Getting antioxidant vitamins from food — including vitamin C — may help protect your heart.peer-reviewed
