The Vegetable Purine Myth
Vegetables are the clearest case where purine numbers mislead. Spinach, asparagus, cauliflower, and mushrooms list moderate purine values, yet large prospective studies found that purine-rich vegetables do not raise gout risk the way meat and seafood do. The reason is that plant purines — mostly adenine and guanine — are metabolized differently from the hypoxanthine that dominates animal foods. For gout, vegetables are not a food to fear; the larger concern is how they are cooked and what is added to them.
Frequently Asked Questions
How many purines are in Ketchup?
Ketchup contains about 11 mg of purines per 100g. This means it low in purines (10.6 mg/100g). As a benchmark, purine levels above 150 mg/100g are classed as high-risk for gout, whereas values below 50 mg are typically viewed as safe.
Is Ketchup high in fructose?
Yes, Ketchup contains about 6.0g of fructose per 100g, which is considered high. Fructose is metabolized in the liver and increases uric acid production. This adds an additional gout risk beyond purine content alone. Limit consumption if you are prone to gout flares.
Should I avoid Ketchup with gout?
Yes, it is recommended to avoid Ketchup if you have gout due to its high fructose content. is high in fructose (6.0g/100g). Fructose accelerates purine breakdown in the liver, which raises uric acid levels independently of dietary purine intake. While its purine content may be low, the fructose risk alone makes it unsuitable for a strict gout diet.
What food category does Ketchup belong to?
Ketchup is classified under Vegetables in our gout food database. Knowing its food group helps you weigh it appropriately within your broader gout diet plan. Browse other vegetables items to compare purine and fructose levels across similar foods.
What are gout-friendly alternatives to Ketchup?
Instead of Ketchup, consider choosing vegetables options rated SAFE in our gout database — these have low purine (under 50 mg/100g) and low fructose (under 2g/100g). Browse our vegetables category page to find the best substitutes for your gout diet plan.
Data Quality
This entry uses T1-level data:
Both purine and fructose were individually measured (lab-analyzed).
Sources include USDA FoodData Central (public domain, CC0 1.0), the USDA+ODS-NIH Database for the Purine Content of Foods Release 2.0 (2025), Kaneko et al. Biol Pharm Bull 2014, and ACR/EULAR clinical guidelines.