03/02/2026
Not so much a physiotherapy issue but interesting recent research.
Diet soft drinks are often marketed as the “healthier” alternative to sugary drinks — but growing research suggests they may not be as harmless as we once thought.
Heart health
Large observational studies have found that people who drink diet soft drinks daily may have a higher risk of:
• Stroke
• Heart disease
• Metabolic syndrome
This may be linked to how artificial sweeteners affect insulin response, gut bacteria, appetite regulation, and blood vessel health — even without sugar or calories.
Brain health & dementia
Some long-term studies have shown an association between frequent diet soda intake and increased risk of dementia and Alzheimer’s disease.
Importantly, this does not prove diet drinks cause dementia, but the link is strong enough to raise concern and prompt further research.
What might be going on?
Artificial sweeteners may:
• Alter gut microbiome health
• Increase cravings for sweet foods
• Disrupt glucose and insulin regulation
• Promote low-grade inflammation
What’s the takeaway?
Diet soft drinks are likely best viewed as an occasional option, not an everyday habit.
For most people, better everyday choices include:
Water (plain or sparkling)
Water with citrus or mint
Tea or coffee (without excess sweeteners)
Small daily habits add up — especially when it comes to heart and brain health over decades
