Users stopping vitamin C serums generally report gradual benefit decline over 2-4 months with antioxidant protection loss occurring quickly (days to weeks), skin brightness fading over 1-2 months returning toward baseline, and collagen-related firmness improvements showing variable persistence with 30-50% benefit retention long-term for consistent users
At the same time, the incidence of diabetic nephropathy, although reduced compared to 20 years ago, is stabilized in recent years, and the incidence of end-stage renal disease (due to reduced cardiovascular mortality and increased life expectancy) is increasing [64]
What it can do is support tissue repair, reduce inflammation, and improve recovery, which over time can help you train more consistently and avoid the injuries that derail progress
The results of a sequential supplementation trial in 53 men and women indicated that after optimization of folate status with folic acid supplements, vitamin B 12 became the major determinant of plasma homocysteine levels (30)