I've actually known about SGS for several years, and regularly used their formula to make smoothies in my Vitamix. My favorite combination is spinach, water, a banana, and whatever fruit I have in the freezer. Reading How to Live a Good Life made me decide to commit to a daily green smoothie.
The thing about my Vitamix, though, is that it's huge - the jar holds 64 ounces, or 8 cups! And it was difficult to blend up smaller portions in that large jar. Vitamix does make smaller containers, but they're all rather expensive.
So I got a NutriBullet, which came with 3 cups and 2 blades - all for less than the cost of one Vitamix jar. It's been great, because it's so easy to blend up one or two servings at a time. I have a green smoothie almost every day now, because of the ease and convenience (which are great strategies for creating a new habit, according to Gretchen Rubin, who literally wrote the book on happiness and habits).
The NutriBullet does a fantastic job of making a smooth smoothie - I follow the SGS technique of blending the greens with liquid first, and I never get lumps. The only thing it doesn't blend perfectly is berry seeds, so I avoid strawberries and raspberries when I use it because I really dislike the grittiness. (This isn't a problem with the Vitamix.) I've been adding chia seeds to my smoothies lately, and those get blended up completely. (I do soak them first, which undoubtedly helps.)
I love my NutriBullet so much that the next time I visit my parents, I'm going to order one for the their place and teach them how to make a daily green smoothie!
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