Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — healthy sleep cycle

Brain Chemistry Balance: When Neurotransmitter Testing Changes Lives - from brain fog to focus, see how tailored insights spark calm, clarity and wellbeing.

As the days shorten and sunlight fades, four key hormonal systems come under pressure: vitamin D, serotonin, cortisol and melatonin. For those susceptible to Seasonal Affective Disorder (SAD), the disruption of these interconnected rhythms can trigger depression, fatigue, poor sleep and low mood. This article explains the science behind the SAD hormone pattern — and what you can do to support your body through the darker months.