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High doses of vitamin B6 may decrease oxalate production, whereas vitamin C can be metabolized to oxalate. This study was conducted to examine the association between the intakes of vitamins B6 and C and risk of kidney stone formation in women. The relation between the intake of vitamins B6 and C and the risk of symptomatic kidney stones were prospectively studied in a cohort of 85,557 women with no history of kidney stones.
Semiquantitative food-frequency questionnaires were used to assess vitamin consumption from both foods and supplements. After adjusting for other dietary factors, the relative risk of incident stone formation for women in the highest category of B6 intake (> or =40 mg/d) compared with the lowest category (<3 mg/d) was 0.66 (95% confidence interval, 0.44 to 0.98). In contrast, vitamin C intake was not associated with risk.
Large doses of vitamin B6 may reduce the risk of kidney stone formation in women. Routine restriction of vitamin C to prevent stone formation appears unwarrante.
Vitamin C For Kidney Function
Too much vitamin C can cause a buildup of oxalate in your body if you have chronic kidney disease.
Therefore, your vitamin C needs may be different if your kidneys aren’t working well or you’re on dialysis.
Vitamin C And Kidney Cancer
A 2015 meta-analysis showed that people with a higher vitamin C intake had a lower risk of kidney cancer, but more research is needed. However, high levels of vitamin C are not recommended for people with kidney cancer, as it could do more damage.
Vitamin C and kidney stones High doses of vitamin C can increase your risk of the most common type of kidney stone, calcium oxalate. More than half a million people seek emergency care for kidney stones every year, according to the National Kidney Foundation. However, vitamin C supplements (such as ascorbic acid tablets) could increase the risk.
Understanding vitamin C Our bodies can’t make vitamin C. Instead, we get it from food or supplements. It can be hard to assess our vitamin C levels because the nutrient is found all over the body. Researchers often use the blood concentration of vitamin C to figure out how much of the vitamin is in a person’s body.
A person’s levels of vitamin C can also change quickly if they take a supplement or the vitamin is given intravenously. Many fruits and vegetables are rich in vitamin C, including: red and green bell peppers
strawberries
kiwis
oranges
grapefruit
potatoes
tomatoes
broccoli Most adults need between 75 and 90 mg of vitamin C daily. If you smoke, you may need an extra 35 mg of vitamin C per day.
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By no means am I saying your findings are incorrect, but essential details are greatly lacking in your claim. For instance, of the 23,000 Swedish men that were involved in this 11-year case study, what records do researchers have of their daily lifestyle, their daily nutrition, and what other vitmans or medications were they taking during this period.