There has been a huge Red Bull Settlement which claims that the companies advertising was false and misleading and not backed by scientific evidence. Red Bull settled but denies any wrong doing.
With the settlement, Red Bull must compensate anyone that has purchased their drinks between January 1, 2002 through October 3rd, 2014. Consumers that qualify can choose to get $10 cash or $15 worth of Red Bull products.
Be sure to head over here to Submit your Red Bull Settlement Claim Form. No proof of purchase is required but you must register for the claim by March 2nd, 2015.
Update: It appears the online form is receiving an error message most likely due to high traffic. Be sure to bookmark the page and check back.