Sugary drinks have no purines — and raise gout risk

Search a purine database for a soft drink and you find nothing worth reporting. There are no purines in sugar, so a cola measures at or near zero — the same band as cucumber, lower than milk.

Now look at what happens to gout risk as people drink more of them.

What the cohort found

Choi and Curhan followed 46,393 men for twelve years in the Health Professionals Follow-up Study, documenting 755 new cases of gout. Sugar-sweetened soft drink intake tracked with risk in a straight line:

Sugary soft drinks	Increase in gout risk
5–6 servings per week	29%
1 serving per day	45%
2 or more per day	85%

Free fructose showed the same shape. Where it supplied 4.5–5.3% of energy, risk rose 41%; at 5.4–6.6%, 84%; above 6.6%, 102%.

Diet soft drinks showed no association at all. That is the detail that makes the mechanism legible: it is not the fizz, the caffeine or the habit. It is the sugar.

Why a food with no purines does this

Purines are one route to uric acid, not the only one. Fructose is metabolised in a way that consumes ATP and generates purine breakdown products inside the body — so the uric acid is not absorbed from the drink, it is manufactured after it.

This is why a purine chart cannot function as a risk score. A chart ranks foods by the raw material they deliver. It has nothing to say about a food that supplies no raw material and prompts the body to make its own.

What this does to the way you read our database

Three of the site's own figures look different in this light.

Fruit juice measures low and is not the same as fruit. Apple juice, orange juice and the rest sit in single digits for purines. They also carry concentrated fructose without the fibre of the whole fruit. The purine column is telling the truth and answering a different question.

Beer is the mirror image. It measures 4.6–13.5 mg per 100 ml — low — and is the drink most consistently linked with attacks, because alcohol slows how quickly the kidneys clear urate. More on that gap.

Spirits measure near zero. Whiskey is 0.2 mg. Nobody should read that as a recommendation.

The honest summary

The measurements on this site describe foods. They are useful for the comparison in front of you — this preparation against that one, this portion against that portion — and they are not a ranking of what raises uric acid.

Sugary drinks are the cleanest demonstration of the gap, because they sit at the bottom of one scale and near the top of the other.

Sources: Choi HK, Curhan G. Soft drinks, fructose consumption, and the risk of gout in men. BMJ 2008;336:309–12. Purine values from the USDA/ODS-NIH database and the NHC 2024 guideline — search them here.