Myprotein takes 50% off a selection of its fitness supplements, apparel, and accessories via coupon code "FRENZY50" as part of its Flash Frenzy Sale. That's tied with our mention from a month ago as the best percent-off coupon we've seen from Myprotein. Shipping adds $4.99, but orders bundled with any item of clothing bag $1 shipping. Deal ends August 13.

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