Hi Karen, From what I know about sugar it raises your blood sugar level, creates insulin and then you crash after your blood sugar goes down whicn results in that tired feeling. There may be other reasons but that is all I know. As far as the holidays, I always have trouble with depression at this tiime of year. I am good thru Thanksgiving because that is the start and I have something great to do for Thanksgiving this year. It is Xmas that gives me the hardest time. I decorate my house to the nines. I have Santas and garlands, antique ornaments , beautiful small gold trees, the whole thing. And I set my table with beautiful red and gold plates, Xmas place mats and napkins, Green stemware, and Xmas candles. I then try to sit back and enjoy it but I am always alone on Xmas eve as my boys go with their Dad. None of my friends ever invite me over. Most go to their relatives or out of town. So I watch a Xmas movie on TV and look at my beautiful tree and feel sad. I do have my boys for all day Xmas so that cheers me up. But then it is over and I feel the big let down cause it will be Jan and the snow and cold will be here for at least 3 months. Plus it is darker outside. I think a lot of us get holiday blues and I haven't figured out how to get around it. I think it comes from childhood when Xmas was such a big deal in our house and we had a huge party and then lots of relatives- most of them have passed. So that is my take on holiday depression. Hope others have suggestions on how to handle this.