25/02/2026
Feeling Unwell in the Heat? Your Gut Could Be Involved
Do you feel faint, flushed, dizzy, or exhausted in warm weather even when others seem fine?
Heat intolerance is more common than many people realise. While hormones and hydration play a role, emerging research shows that gut health may also influence how well we tolerate heat.
Your gut microbiome helps regulate:
✔️ Inflammation
✔️ Nervous system balance
✔️ Energy production
✔️ Histamine levels
✔️ Communication between the gut and brain
When the microbiome is out of balance, it can affect temperature regulation potentially contributing to symptoms like rapid heartbeat, headaches, fatigue, or overheating.
Supporting gut health through a diverse, fibre-rich diet, stress management, quality sleep, and overall lifestyle balance may help improve resilience not just digestion, but whole-body regulation.
Heat intolerance isn’t all in your head. It can be a sign your body needs support.
Many people notice they feel unusually faint, flushed, exhausted, or dizzy in...