Coho Health Newsletter 4th September 2025

Hi,

It’s Dee here 👋

In this week’s edition: two seemingly “normal” things that may be anything but.

We’re unpacking the long-term effects of artificial sweeteners on brain health – and why your IBS symptoms might actually be masking something deeper.

Let’s dive in ⬇️

🧪 1. Research Corner

🍭 Sweeteners & Brain Health

An 8-year study of over 12,000 adults found that those consuming the most artificial sweeteners – like aspartame, saccharin, and xylitol – had 62% faster cognitive decline, equivalent to 1.6 years of ageing.

The strongest effects were seen in adults under 60.
(https://pubmed.ncbi.nlm.nih.gov/40902134/).

Other research has linked sweeteners to:
📌 Weight gain (!), insulin resistance and taste alterations
📌 Higher risk of type 2 diabetes + metabolic syndrom
📌 Headaches + depression
📌 Cardiovascular issues

You might be wondering how non- or low-caloric sweeteners could be causing harm? Studies show sweeteners can cause:

➡️ Gut microbiome disruption
➡️ Inflammation + oxidative stress
➡️ Disruption of insulin signaling pathways and insulin secretion
➡️ Alter sweet perception
➡️ Modulate the gut-brain and gut-kidney axes

🧠 Bottom line: While the data is mostly observational, there’s a growing body of evidence suggesting that low- and no-calorie sweeteners may not be as harmless as once thought.

 

💡 Gut Health Insight

Told you “just have IBS”?  Well in most cases, it’s not the full story. 

Up to 78% of people with IBS may actually have SIBO – a root cause (or contributing factor) that’s often overlooked.

IBS symptoms aren’t just something to “put up with.” They’re signals – and there’s almost always a root cause worth uncovering and addressing.

👉 We explain more about the IBS & SIBO connection here, and you can find in depth articles on our website here (IBS) and here (SIBO).

Health in 60 seconds, as promised…

Dee Brereton-Patel
Founder, Coho Health

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