There isn't a single hormone specifically known as the "sad hormone." However, several hormones are linked to mood regulation, and fluctuations in their levels can contribute to feelings of sadness or depression.
One hormone often associated with mood is serotonin, which is a brain chemical that affects mood. A drop in serotonin levels can play a role in seasonal affective disorder (SAD), a type of depression linked to changes in sunlight exposure. Reduced sunlight can lead to a decrease in serotonin production, potentially triggering depressive symptoms.
Another hormone implicated in mood is melatonin, which regulates the sleep-wake cycle. Studies suggest that both forms of SAD (winter and summer) may involve altered melatonin levels. The body may produce higher than normal amounts of melatonin in people with SAD, potentially affecting mood and sleep patterns.
While there's no "sad hormone," understanding the role of neurotransmitters like serotonin and hormones like melatonin can provide insights into the complex relationship between these chemicals and mood regulation.
