1 Lack of protein.
If you’re intentional about the ingredients you use in your smoothies, this drink can be a quick and easy way to add protein to your day. Not only does protein help build more lean muscle and help you lose body fat, but “protein helps you feel fuller for longer,” says Trista Best, MPH, RD, LD of Balance One Supplements.
According to Mary Sabat MS, RDN, LD, including adequate protein (and fiber) are critical to a healthy smoothie. “If a smoothie doesn’t have these components, it may keep people from feeling fuller for longer, which can lead to increased calorie intake from other sources throughout the day.”
In fact, one study published in the journal Obesity found that participants who ate a low-protein breakfast ate more food on average at their next meal. Researchers believe this is because people have increased their protein intake by supplementing their low-protein meals and eating more during the day. The study also found that participants who ate a high-protein breakfast ate less at their next meal. This is one of the ways that not getting enough protein can sometimes lead to excess calorie consumption and weight gain.
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