Q: When does SAD start and how long does it usually last?
Marla Ahlgrimm: Generally, SAD starts when clocks are changed in the fall and lasts until spring.
Q: What are the symptoms of SAD?
Marla Ahlgrimm: SAD often presents with fatigue and low energy but then involves more symptoms of depression such as sadness, irritability, lack of concentration, lethargy and apathy. SAD victims also crave carbohydrate foods, which can lead to weight gain.