Pickles: what the studies actually measured

Most of what science says about pickles comes from two places that have little to do with a jar of dill spears. The cancer findings come from East Asia, where pickles are salted and fermented vegetables. Pooling 60 studies, people who ate more pickled foods had about 50 percent higher odds of stomach cancer (OR 1.52), rising to 1.89 in Korean studies and 1.86 in Chinese ones. In studies from other countries the figure was 1.14, and its range included no effect at all. All of this is observational, and most of it is case-control work, where people who already have cancer are asked to remember what they ate. For oesophageal cancer, two pooled analyses found about double the odds (OR 2.10 and 2.08), again mostly from case-control studies. The cohort studies, which follow healthy people forward in time, found no significant link (RR 1.43, range 0.85 to 2.42). The benefit findings measured pickle juice, the brine drunk on its own, and nobody in those trials ate a pickle. In 82 people with cirrhosis, sipping pickle juice when a cramp started cut cramp severity by 2.25 points on a 10-point scale, against 0.36 with tap water. That is one trial. A 2025 review of 12 trials in cirrhosis counts pickle juice among the treatments that worked, and its verdict rests on that same single study. Those patients were under medical care, so this is no reason to start drinking brine for cramps on your own. If you have cirrhosis, bring it up with the doctor who manages your liver.

The numbers, per 100 g

What cooking and storage change

• In a 6-week pilot trial of 31 women, 100 g/day of fermented or pickled vegetables did not change inflammatory markers, and the fermented group showed an increase in F. prausnitzii (P = 0.022). — 31 women aged 18 to 69, three arms, 6 weeks (n = 31) Evidence B source
  No change in inflammatory markers, F. prausnitzii up in the fermented arm (P = 0.022)

What it does to your health

• Observational data from 34 studies link Asian pickled vegetable intake with roughly double the odds of oesophageal squamous cell carcinoma (OR 2.08). — 34 observational studies, mostly retrospective, English and Chinese literature (n = 34 studies) Evidence C source
  OR 2.08 (95% CI 1.66 to 2.60)

Safety, limits and interactions

• Observational data from 60 studies link eating pickled vegetables or foods with about 50% higher odds of gastric cancer (OR 1.52), stronger in Korea (1.89) and China (1.86). — 60 studies (50 case-control, 10 prospective), mostly East Asia (n = 60 studies) Evidence C source
  OR 1.52 (95% CI 1.37 to 1.68), cohorts 1.32 (1.10 to 1.59), non-Asian studies 1.14 (0.96 to 1.35)
• A case report describes a woman on warfarin whose INR rose to 9 after she stopped eating dill pickles, a vitamin K source. — one 36-year-old woman on warfarin (n = 1) Evidence D source
  INR 9 with periorbital bruising on unchanged warfarin dose

What people believe that the data does not support

• In 9 healthy men, drinking 1 mL/kg of pickle juice left plasma sodium, magnesium, calcium, osmolality and volume unchanged for 60 minutes. — 9 euhydrated healthy men, mean age 25, crossover (n = 9) Evidence C source
  No change in plasma electrolytes or volume after about 86 mL

Who this works differently for

• In 82 people with cirrhosis, sips of pickle juice at cramp onset cut cramp severity by 2.25 points on a 10-point scale versus 0.36 with tap water over 28 days. — 82 patients with cirrhosis and more than 4 cramps in the prior month, 74 completed (n = 82) Evidence B source
  VAS-cramps change -2.25 vs -0.36, P = 0.03, no difference in sleep or quality of life
• A 2025 systematic review of 12 randomised trials in cirrhosis found that pickle juice reduced cramp severity against placebo, a verdict based on a single trial. — 12 RCTs of 13 interventions for muscle cramps in cirrhosis (n = 12 RCTs) Evidence B source
  Pickle juice lowered cramp severity versus placebo, based on one trial

What is still unknown

• Observational data tie high pickled food intake to oesophageal cancer (OR 2.10) in pooled studies, yet cohort studies alone showed no significant link (RR 1.43, CI 0.85 to 2.42). — case-control and cohort studies published 1964 to April 2018 Evidence C source
  Pickled food OR 2.10 (1.64 to 2.69) overall, case-control 2.28, cohort RR 1.43 (0.85 to 2.42)

The bottom line

The one test of the popular idea that pickle juice refills your electrolytes found no change. Nine healthy men drank about 86 mL, and for the next hour their blood sodium, magnesium, calcium and fluid volume stayed where they were. The authors concluded that amounts like this are unlikely to replace what exercise takes out. It was a tiny study in rested men, so it tells you what the juice does not do, and very little else. One small trial put fermented vegetables next to pickled ones. Thirty one women ate 100 g a day of one or the other, or no vegetables, for six weeks. Neither changed the blood markers of inflammation. The fermented group showed a rise in Faecalibacterium, a common gut bacterium, and the report did not test whether that differed from the pickled group. It was a pilot built to test whether such a trial can be run, too small to settle anything about health. If you take warfarin, one case report is worth knowing. A woman on an unchanged dose saw her INR, the clotting test that guides the dose, climb to 9 after she stopped eating dill pickles, which carry vitamin K. That is a single patient and nobody proved the pickles caused it. The practical point is about change: if pickles are a regular part of your diet, tell whoever manages your warfarin before you drop them or add a lot more. The cramp trial was run in people with cirrhosis under medical care, and it says nothing about cramps in anyone else. Even with cirrhosis, drinking brine for cramps is a decision for your liver doctor to make. We found no study on pickles in pregnancy, in children or in kidney disease, so this page has nothing to tell those groups either way. This page does not show sodium yet.

Sources

1. pckl-b1-07 · RCT
   Thirty-one women were randomized into one of three groups: 100 g/day of fermented vegetables (group A), 100 g/day pickled vegetables (group B), or no vegetables (group C) for six weeks. ... There were no significant changes in levels of inflammatory markers among groups. At timepoint 2, group A showed an increase in Faecalibacterium prausnitzii (P = 0.022)
   PLoS One, 2022 · checked 2026-09-23
2. pckl-b1-02 · meta-analysis of observational studies
   The overall random effects odds ratio (OR) and 95% confidence interval (CI) for pickled vegetable consumption was 2.08 (1.66-2.60), but the results were heterogeneous across studies. ... There were only three prospective studies.
   Br J Cancer, 2009 · checked 2026-09-23
3. pckl-b1-01 · meta-analysis of observational studies
   The OR (95% CI) was 1.52 (1.37-1.68) for the overall association, 1.56 (1.39-1.75) for case-control, and 1.32 (1.10-1.59) for cohort studies. The OR (95% CI) was 1.89 (1.29-2.77) in Korean, 1.86 (1.61-2.15) in Chinese, and 1.16 (1.04-1.29) in Japanese studies, and 1.14 (0.96-1.35) in studies from other countries.
   Cancer Epidemiol Biomarkers Prev, 2012 · checked 2026-09-23
4. pckl-b1-08 · case report
   She was found to have an INR of 9 despite maintaining her normal warfarin dose of 12.5 mg/15 mg alternating qd. The only identifiable precipitating factor was that the patient recently stopped eating dill pickles.
   Clin Rheumatol, 2021 · checked 2026-09-23
5. pckl-b1-06 · crossover trial
   Plasma sodium concentration, plasma magnesium concentration, plasma calcium concentration, plasma osmolality, and plasma volume did not change during the 60 minutes after ingestion of each fluid ... If EAMCs are caused by large electrolyte loss due to sweating, these volumes of pickle juice or CHO-e drink are unlikely to restore any deficit incurred by exercise.
   J Athl Train, 2009 · checked 2026-09-23
6. pckl-b1-04 · RCT
   At trial completion, the respective values for the pickle juice and control arms were -2.25 ± 3.61 points on the VAS for cramps, compared with control tap water (-0.36 ± 2.87), P = 0.03
   Am J Gastroenterol, 2022 · checked 2026-09-23
7. pckl-b1-05 · systematic review of RCTs
   Twelve RCTs evaluating 13 distinct interventions were identified. ... Pickle juice reduced cramp severity compared to placebo.
   Aliment Pharmacol Ther, 2025 · checked 2026-09-23
8. pckl-b1-03 · meta-analysis of observational studies
   the combined OR/RRs (95%CI) of studies comparing the highest and lowest categories were 2.10 (1.64-2.69) for pickled food. ... whereas no significant associations were detected between them in cohort studies (combined RRs: processed food: 1.24 (95%CI: 0.98-1.58), pickled food: 1.43 (95%CI: 0.85-2.42)).
   Bull Cancer, 2018 · checked 2026-09-23