ALB and chronic kidney disease: Witham et al. performed an RCT that found no treatment effect on the estimated glomerular filtration rate (eGFR) or urine albumin–creatinine ratio (UACR) after 400 μg/day MK-7 supplementation for 12 months in 159 adult patients with CKD (n = 80 intervention, n = 79 placebo) [27].