Protein Showdown: chicken breast, boneless, skinless, raw vs beef flank steak, boneless, choice, raw Purine Content

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

Protein Source Purine Comparison

Food	Purine (mg/100g)	Source Type
chicken breast, boneless, skinless, raw	289	Animal
beef flank steak, boneless, choice, raw	99	Animal

Epidemiological studies consistently show that animal-source purines (meat, seafood) are more strongly associated with gout attacks than plant-source purines (soy, legumes). Dairy protein appears protective. Eggs contain virtually no purines. The ACR 2020 guideline recommends limiting animal protein but does not restrict plant protein or dairy.

Plant vs Animal Protein: The Science

Epidemiological studies consistently find that animal-source purines (meat, seafood) significantly increase gout risk, while plant-source purines (legumes, soy) show little to no association. The difference may lie in purine base composition: animal tissues have higher hypoxanthine ratios (most uricogenic base), while plant purines are richer in adenine and guanine with weaker uric acid effects. Dairy protein appears actively protective, possibly by promoting uric acid excretion.

Practical Protein Strategy for Gout

Tofu, lentils, eggs, and low-fat dairy are excellent protein sources for gout patients. They provide adequate protein without the gout risk of red meat and certain seafood. The ACR 2020 guideline does not restrict plant protein or dairy — only animal protein from meat and seafood warrants limitation. A gout-friendly protein strategy shifts proportions toward plant and dairy sources while keeping lean animal proteins in moderation.

How This Comparison Is Built

Every food in this comparison passes through a three-factor risk model that looks at purines, fructose, and alcohol independently. Purine values are sourced from 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 from USDA SR28. Verdicts apply ACR 2020 limits — Safe means under 50 mg purine and 2 g fructose with no alcohol; Moderate falls between; Avoid exceeds these or contains alcohol. Data quality tiers (T1/T2/T3) are listed on each food's detail page.

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

Is chicken breast, boneless, skinless, raw better than beef flank steak, boneless, choice, raw for gout?

chicken breast, boneless, skinless, raw has 289 mg purine/100g vs beef flank steak, boneless, choice, raw at 99 mg/100g — a difference of 190 mg. Purines from plant sources generally show weaker association with gout attacks than animal purines in epidemiological studies. Dairy and eggs are essentially purine-free protein options.

Does plant protein cause gout like animal protein?

No. Multiple large cohort studies show that plant-source purines (legumes, soy, vegetables) have little to no association with gout risk, while meat and seafood purines significantly increase risk. Dairy protein appears protective — possibly by promoting uric acid excretion. The ACR 2020 guideline does not restrict plant protein sources.