Scientists are uncovering the biological secrets behind why we feel down during the dark winter months, known as Seasonal Affective Disorder (SAD). Research has shown that our bodies have an innate rhythm tied to the changing seasons, which affects not just our mood but also our energy levels and appetite.
The key regulator of this internal clock is light. As daylight hours decrease, our natural circadian rhythms can become disrupted, leading to symptoms like lethargy, overeating, and depression. However, scientists are now working out how these changes affect individual people differently.
Researchers have found that even among those without clinical depression, many experience a milder seasonal dip in mood, known as the winter blues. This is likely due to reduced daylight hours affecting our natural alertness and hormone balance. On the other hand, some people may be more sensitive to this shift, making them more prone to SAD.
One area of investigation involves studying people with bipolar disorder, where manic episodes often peak in spring and depression tends to be more common in winter. It's suggested that these individuals are particularly sensitive to light and seasonal cues, which can trigger their symptoms.
Large-scale studies have revealed even broader biological changes across the year. Researchers have identified over 4,000 protein-coding genes with changing expression levels, as well as fluctuations in cellular composition of blood itself.
However, finding the perfect solution remains a challenge. While bright light therapy is considered gold-standard treatment for SAD, timing and dosage are critical factors. Even among those who struggle with SAD, cognitive behavioural therapy tailored to their needs can be an effective antidote.
The most crucial takeaway from this research is that shifting our mindset towards winter can play a significant role in managing symptoms. By learning to reframe our relationship with the season, we may regain some joy during the darker months.
				
			The key regulator of this internal clock is light. As daylight hours decrease, our natural circadian rhythms can become disrupted, leading to symptoms like lethargy, overeating, and depression. However, scientists are now working out how these changes affect individual people differently.
Researchers have found that even among those without clinical depression, many experience a milder seasonal dip in mood, known as the winter blues. This is likely due to reduced daylight hours affecting our natural alertness and hormone balance. On the other hand, some people may be more sensitive to this shift, making them more prone to SAD.
One area of investigation involves studying people with bipolar disorder, where manic episodes often peak in spring and depression tends to be more common in winter. It's suggested that these individuals are particularly sensitive to light and seasonal cues, which can trigger their symptoms.
Large-scale studies have revealed even broader biological changes across the year. Researchers have identified over 4,000 protein-coding genes with changing expression levels, as well as fluctuations in cellular composition of blood itself.
However, finding the perfect solution remains a challenge. While bright light therapy is considered gold-standard treatment for SAD, timing and dosage are critical factors. Even among those who struggle with SAD, cognitive behavioural therapy tailored to their needs can be an effective antidote.
The most crucial takeaway from this research is that shifting our mindset towards winter can play a significant role in managing symptoms. By learning to reframe our relationship with the season, we may regain some joy during the darker months.