Professor Luke O'Neill

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1,535 appearances 7 recordings 2 series first heard Apr 2026 last heard 3 Sep

Professor Luke O'Neill’s voice in public audio — every appearance, attributed to the second.

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Recordings per month over the last 12 months — 7 in all, peaking in May 2026 with 3.

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Show Me the Science with Luke O'Neill · The Science of Vitamins · 3 Sep 2026 podcast

Uh Rickets in the north of England was happening in the Industrial Revolution because the sun couldn't penetrate the clouds, and the children couldn't make vitamin D.

Now clearly you take vitamin D in that situation, but that's no longer the case.

But anywhere at a deficiency, then you have to take it and your GP will have

Help you find that out.

Now, what's interesting is though this big study on multivitamins.

Now you will see uh products on sale: vitamin C, vitamin E, zinc, certain metals, and metals are used by enzymes as well.

And a big study was done, three and a half thousand people, and these people had an eye disease called age-related macular degeneration.

Where the eyes be as you get older don't work as well.

And they put them on multivitamins and there was an effect there was a decreased risk of twenty five percent of getting AMD if he gave them multivitamins in older people.

And that's important.

We're mainly talking about older people here now, who either have bad diets for various reasons, or they can't absorb the vitamins as they get older.

So there's something of a case to be made in older people to consider multivitamins.

And following up on that trial, a brand new trial, called the Cosmos trial, twenty-one thousand older Americans uh between twenty fifteen and twenty twenty.

They were given multivitamins, and guess what?

It improved their cognitive skills.

There was a statistically significant effect.

Their their brains, in terms of their cognitive skills, that means like problem solving, was two to three years younger.

Than those who hadn't taken the multivitamins, right?

Now it's kind of hard to do these sorts of studies because there's confounding variables.

There could be other reasons for this, but it was well controlled, and they did conclude there was a modest effect that multivitamins do help with cognition as you get older, right?

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