serum vit c level is surrogate marker of plant based diet

 a

The level of vitamin C in the blood was considered a “good biomarker of plant food intake” and hence was used as a proxy for a healthy diet. The conclusions held up. The drop in mortality risk among those with healthier habits was equivalent to being fourteen years younger. 55 It’s like turning back the clock fourteen years—not with a drug or a DeLorean but just by eating and living healthier.