Variety may be the spice of life, but consistency is key. Especially when it comes to weight loss. While nutrition experts have long praised a diverse diet, a new study in the journal Health Psychology shows that eating the same thing day in and day out might help shed pounds faster than eating a range of foods. With nearly 3 in 4 US adults obese or overweight — and as pharmaceutical companies scramble to patent a weight loss drug without debilitating side effects — it seems everyone’s thinking