Seed is a highly studied, 

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Beauty Counter is one of my favorite clean beauty brands.

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I usually use chia, hemp or yogurt, or nut butter in my smoothies as a protein powder. 

If I had to recommend protein powder brands...

I love this Philosophie Cacao Magic  and I use it anywhere I would just use cocao powder. I love all of her protein superfood powders because they are whole ingredients, no fillers, and no sweetners either. 

Four Sigmatic Protein powder is a protein powder I recommend if you really need a true protein powder.