Causes of Weight Gain from Smoothies 

"Protein can also help you feel full longer," explains Balance One Supplements' Trista Best, MPH, RD, LD.  

Mary Sabat MS, RDN, LD says a nutritious smoothie needs protein and fiber. 

If a smoothie lacks these ingredients, it may not keep a person full for long, leading to more calories later in the day. 


Some people may not realize how important fiber is for weight loss. 

Satiety and gut microbiome improvement from a high-fiber diet can help avoid many chronic diseases and regulate hunger. 

"Your smoothie may not satisfy you if it lacks fiber-rich ingredients like [whole] fruits, vegetables, or whole grains." 

Since veggies and leafy greens are bitter, it's typical to add extra sugars to smoothies.  

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