Changes in daylight hours and cooler temperatures contribute to various body changes in autumn. If you notice mood changes, energy dips, or generally feeling "off" in the transition from summer to fall, you're not alone.

1. Your Mood Changes

Many people experience mood changes as the weather cools and the days become shorter. Less physical activity could be to blame, but other factors may also be at play:

Low vitamin D levels: Vitamin D comes primarily from sun exposure. Vitamin D deficiency can occur in the fall and winter, as there are fewer daylight hours. It is linked to an increased risk of anxiety and depression.

Seasonal affective disorder (SAD): People with SAD have lower levels of serotonin (a hormone that helps regulate mood). Some evidence suggests that sunlight help

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