Last reviewed: 2026-09-03 • Editorial Standards

Root Vegetables Ranked by Purine Content

Evidence-based comparison — data from USDA+ODS-NIH PURINE DATABASE Release 2 (March 2025)

Lowest Purine Root Vegetables

#1radish root, japanese1.7 mg
#2carrots, raw2.1 mg
#3onions, raw2.2 mg
#4Carrot2.2 mg
#5Onion2.3 mg
#6turnip3.9 mg
#7yam, japanese4.0 mg
#8potato, raw6.5 mg
#9Potato6.5 mg
#10garlic, raw17.0 mg

Highest Purine Root Vegetables

#17Potato6.5 mg
#16potato, raw6.5 mg
#15Sweet potato17.0 mg
#14Garlic17.0 mg
#13sweet potato, raw17.0 mg
#12garlic, raw17.0 mg
#11Yamabushitake33.5 mg
#10radish leaf, japanese33.6 mg
#9White radish sprouts73.2 mg
#8radish sprouts, white, raw73.2 mg

Category Average: 18.4 mg/100g

The average across 17 Root Vegetables foods with lab-measured data. Foods below this average are better-than-typical choices within this category.

How to Use This Ranking

The purine ranking is sorted from lowest to highest. Rank #1 is the lowest-purine food in the category. Foods in the top half (above median) should be consumed with more awareness of portion and frequency. The difference between adjacent ranks varies: in some categories, rank #5 and #10 might be only 10 mg apart; in others, the gap can be 100+ mg. Always check the actual milligram value, not just the position. Rankings do not account for fructose or alcohol — use individual food pages for a complete risk assessment.

ACR 2020 Guideline Context

The American College of Rheumatology recommends that gout patients focus on purine awareness rather than complete food group elimination. Within any category, there is a wide purine range. The goal is to shift toward lower-purine choices within categories you already eat, rather than eliminating entire food groups. This ranking helps you identify which specific items to prioritize and which to limit.

Japanese guidelines recommend under 400 mg of total dietary purines per day. Using this ranking, you can estimate how much of budget each food uses per typical serving.

How This Comparison Is Built

Each item here is scored by a three-factor risk engine covering purines, fructose, and alcohol. Purine values draw on the USDA+ODS-NIH PURINE DATABASE Release 2 (March 2025) and Kaneko et al. (Biol Pharm Bull 37(5):709-721, 2014, PMID: 24553148); fructose comes from USDA SR28 tables. Classification uses ACR 2020 thresholds — Safe under 50 mg purine and 2 g fructose with no alcohol, Moderate in between, Avoid above, or when alcohol is present. Each food page labels its data quality as T1 (lab-measured), T2 (measured plus consensus), or T3 (category estimate).

This comparison is provided for informational purposes only and does not constitute medical advice. Individual tolerance to purines and fructose varies. Consult a healthcare professional for personalized dietary guidance. Last reviewed: 2026-09-03.

Frequently Asked Questions

Which root vegetables are lowest in purines?
Among 17 root vegetables with measured purine values, the lowest options include radish root, japanese at 1.7 mg/100g and carrots, raw at 2.1 mg/100g. Most root vegetables sit in the low range — well below meat and seafood.
Are potatoes bad for gout?
Potatoes are low in purines and are not a gout trigger in the research literature — the ACR 2020 guideline does not flag them. What matters is preparation: a plain baked or boiled potato is very different from fries or chips, which add fat and salt but not purines. Keep the potato, skip the fryer.
Can I eat carrots and onions with gout?
Yes. Carrots, onions, and most root vegetables are low-purine foods (typically under 30 mg/100g) and are a core part of a gout-friendly plate. The FoodCanEat ranking shows exact values — root vegetables are among the safest vegetable categories for gout.