$18 free shipping w/ Prime点我购买
Amazon offers Prime members the Optimum Nutrition Gold Standard Whey Protein Powder 2-lb. Tub in Double Rich Chocolate for $18.41 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.79.) That's the lowest total price we could find in any flavor by $12, although we saw it in another flavor for $2 less in March. It contains 24 grams of protein in every serving.
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