Ultra K

Ultra K is a dietary supplement made for endurance athletes. It combines three forms of Vitamin K — K1, MK7, and MK4 — with Vitamin D, in doses aimed at supporting performance, strength, and recovery.

The formula traces back to its founder, Dr. Pat Theut. After cardiology research that began in 2002, he reversed severe plaque buildup in his own arteries, then worked out how to encapsulate the specific forms of Vitamin K behind that result.

Ultra K’s goal is plain: deliver the highest-quality Vitamin K and D combination at the lowest cost it can, so any endurance athlete can be optimized without overpaying. That belief runs under the brand’s line — Endurance Made Easy — and the idea that better performance should be within reach whatever level you run at.