Smoothie myths, checked
What people believe about their glass, why it sounds right, and what is true.
Sort of A fruit smoothie is a healthy breakfast
Sort of. The fruit is fine, the protein is missing. A 20 oz Caribbean Way has 2 g of protein and 83 g of sugar. Add your 30 g, drop the juice, and it's breakfast.
No Blending destroys the fiber in fruit
No. Every gram of fiber is still in the glass, just cut smaller. Juicing is what takes it out: a cup of orange juice has half a gram of fiber.
Not the way you think A smoothie spikes your blood sugar more than eating the fruit
By finger stick, blended apple and blackberries peaked lower than whole (28.8 against 42.5 mg/dL). Sensors make drinks look worse: GI 69 on a sensor, 53 by fingertip.
Not the way you think Banana ruins the nutrients in a smoothie
In 8 men, flavanols drunk in a banana smoothie reached the blood 84% lower than from a capsule. It's one family of compounds, Mars paid, and banana brings potassium.
Yes, but Protein powder is full of lead
Yes, but. In 2025 tests, over two thirds of 23 products went past a very cautious daily lead level, plant ones about nine times dairy. None was near immediate harm.
No You need protein powder to make a protein shake
No. A cup of 1% cottage cheese has 28 g of protein. 7 oz of Greek yogurt and a cup of milk have 28 g too. Seven of our top ten glasses have no powder at all.
No Honey makes a smoothie healthier than sugar
No. The US guideline counts honey as added sugar, the same as table sugar. One tablespoon has 17 g of sugar, past the 10 g of added sugar it allows a whole meal.
Not the way you think Only the calories decide how full a shake keeps you
Calories kept the stomach full longer, but thickness changed how full people felt: a thick 100 calorie shake felt fuller at 40 minutes than a thin 500 calorie one.
No Replacing meals with shakes never works long term
No. Across 23 trials and 7,884 adults, diets with meal replacements lost about 3 lb (1.44 kg) more at a year. They replaced meals. Nobody tested a shake added on top.
