Some antidepressant medications can cause weight gain, especially the older tricyclic antidepressants (TCAs) such as Tryptizol, Saroten, and Clomipramine; as well as newer drugs such as Remeron (Mirtazapine). Lithium (for manic-depressive disorder) often causes weight gain. The most common antidepressants known as SSRI’s (for example Citalopram and Sertraline) usually don’t impact weight significantly. More on depression
One of the top belly fat-building offenders is stress — and not just because that bad day at work can make you feel like demolishing a pint of Cherry Garcia. When your body senses you're overwhelmed, it automatically starts producing cortisol — a hormone has been proven to eff with your body chemistry and stimulate extra fat storage in your gut. Yeah, sucks. When you're feeling worked up, close your eyes and take long, deep breaths for about five minutes. You'll immediately start to feel more relaxed, which should calm those hormones down and nix that belly sabotage.
Still not convinced to make sleep a priority? A lack of sleep doesn't only affect how much and which food you eat, but also how it metabolizes that food. Insufficient sleep messes with your metabolism by making your body more insulin resistant—a condition that usually leads to diabetes and weight gain—according to a 2012 study published in the Annals of Internal Medicine. (And, get this, it even changes your fat cells.)
Don’t let extra hours lounging in bed stand between you and a flatter belly. While getting enough sleep can help boost your metabolic rate, sleeping in may undo any benefit you’d enjoy from catching a few extra winks. One study reveals that late sleepers who snoozed past 10:45 in the morning ate nearly 250 more calories over the course of the day, despite eating half as many fruits and vegetables as their early bird counterparts. Even worse, they chowed down on more salty, sugary, and trans fat-laden fast food than those who woke up earlier. If you happen to head out of the house early, you’re in for an additional metabolic boost; researchers at Northwestern University have found that people exposed to just a short period of early morning sunlight had lower BMIs than their late-waking counterparts.