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25.05.2026 New claim submitted for Backwards Stair Climbing, 1 Hour 09.05.2026 New claim submitted for Mental Calculation, Division 09.05.2026 New claim submitted for Mental Calculation, Square Roots Keywords: (e.g football beer mat)	Listed below are the verified claims for the record listed. Most blood donated - Feline - Current world record 1. Since 15 October 2008, Kitty Hungerschafer (USA) has donated 46 units (each 50 mililiter) of life saving blood (as of 12 May 2016).     The Book of Alternative records - World records, record breakers and more!