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The Reset Series™
Vitae Weekly Reset — Issue #34
On What’s Actually Changing Your Brain
Five pieces this week, and every one of them is really the same question asked from a different angle: what does this everyday thing actually do to your brain, once you look past the headline?
A large study found sweeteners linked to faster cognitive decline — but only in some groups, and not proof of cause. A rigorous review found intermittent fasting doesn’t beat ordinary dieting, even though a separate trial found its results last. A twenty-year study found frequent TV-watching linked to smaller brain volumes — but sitting at a desk showed no such link, which changes what the finding actually means. A joint supplement taken by millions was linked to faster Alzheimer’s progression in people who already have cognitive decline. And a coffee study explained a mechanism for something population data has shown for years, without proving coffee itself does anything new.
None of these are simple. All of them are worth fifteen minutes.
— The Vitae Team
Intermittent fasting
 
This week on the Vitae blog
Do Sweeteners Speed Up Cognitive Decline?
A study of nearly 13,000 adults found six common sweeteners linked to 62% faster memory and thinking decline. The effect was concentrated in people under 60 and those with diabetes — and it’s an association, not proof.
Read →
 
Does Intermittent Fasting Actually Work?
A new study found weight lost through fasting stayed off a year later. A much larger review of 22 trials found fasting doesn’t outperform ordinary dieting at all. Both are true.
Read →
 
Is TV Bad for Your Brain, or Is It About What You Do While Sitting?
Frequent TV viewing in midlife was linked to smaller brain volumes decades later. Sitting at a desk job showed no such link — which suggests the type of sitting matters more than the amount.
Read →
 
Does Glucosamine Speed Up Alzheimer’s Progression?
A major study links one of the world’s most widely used joint supplements to faster progression from mild cognitive impairment to Alzheimer’s, with a biological mechanism to back it up.
Read →
 
Does Coffee Actually Slow Cellular Ageing?
Scientists found a receptor coffee compounds may activate that protects ageing cells — and caffeine turns out to have almost nothing to do with it.
Read →

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This week’s deep dive
The Sweeteners Study
Sugar substitutes have spent decades being sold as the safe swap. A study of 12,772 adults, followed for around eight years, complicates that pitch: people consuming the most sweeteners showed 62% faster cognitive decline than those consuming the least, equivalent to roughly 1.6 years of extra brain ageing.
Six of the seven sweeteners tested were implicated — aspartame, saccharin, acesulfame-K, erythritol, sorbitol and xylitol. Only tagatose, a less commonly used sweetener, showed no link.
Two details complicate the headline in useful ways. The effect disappeared entirely in people over 60. And it was strongest in people with diabetes — the exact group most likely to use these products for a genuine medical reason.
This is an association, not proof of cause, and the study’s own authors were explicit about that. But it’s a large, well-conducted study with a clear dose-response pattern, and a reasonable prompt to look again at heavy daily reliance on sweetened diet products.
Read the full piece →
 
Quick wins for this week
Check what’s actually in your diet drinks
If you’re relying on multiple diet sodas or sweetened products daily, particularly with diabetes, this is a reasonable moment to moderate rather than eliminate.
If you fast, consider the timing of your window
An earlier eating window appeared to preserve more muscle than a later one in the same study. If preserving lean mass matters to you, mornings may have the edge.
Notice what fills your sitting time
The TV research suggests it’s not sitting itself that matters, but whether the activity is passive or engaging. A book or a conversation instead of the TV, when you can.
If you or someone you care for takes glucosamine and has cognitive symptoms
This is a specific, reasonable thing to raise with a GP — not a reason to stop anything without medical advice.
 
The Reset Companion
Working out what a new study actually means for your own situation — rather than the headline version — is exactly the kind of question the Reset Companion is built to help with.
Try the Reset Companion — 30 free messages →
 
Every piece this week has the same shape: a real finding, a real limitation, and a gap between the two that the headline usually skips. Sweeteners are linked to decline, but mostly in specific groups. Fasting works, but not better than anything else. TV is linked to brain changes, but sitting itself isn’t the culprit. Glucosamine is linked to faster progression, but only in people who already have cognitive impairment.
None of that makes the findings less worth knowing. It just means the honest answer to “does this affect my brain” is almost always: it depends who you are, and what else you’re doing.
Back next Wednesday.
The Vitae Team

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If you missed Sunday’s Lifestyle Edit
Greece
Five Islands, Five Ways of Doing Things Well
Drakos Taverna, Mylopotas beach, Ios
We went to Greece — five islands, five different ways of doing things well. A Kos resort that pays for your dinner elsewhere, a Corfu taverna where Lawrence Durrell wrote his best book about the island, a Rhodes fortress that’s half medieval, half fascist-era theatre, a Folegandros retreat built from its own cliff, and a sixty-year-old Ios taverna that hasn’t moved an inch.
Read The Lifestyle Edit No.24 — Greece →
In this edit
 

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