What foods should be avoided with hyperuricemia?

Written by Li Hui Zhi
Endocrinology
Updated on September 25, 2024
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Hyperuricemia generally requires a low-purine diet. So, what foods should be avoided? First, seafood and sea fish, as they have a high purine content and should not be consumed. Second, avoid animal organs like chicken and duck kidneys. Third, abstain from alcohol, especially strong spirits and beer, which tend to raise uric acid levels, so it's recommended to avoid them. Fourth, it is advised not to consume long-cooked broths, such as those commonly enjoyed in Guangdong where the broth is simmered for several hours, as these also have high purine content. Fifth, limit intake of some bean products and various mushrooms, as these should also be consumed minimally.

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Written by Luo Juan
Endocrinology
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Hyperuricemia treatment agent

Currently, the main treatments for hyperuricemia in clinical practice include the following types. One category is drugs that inhibit uric acid synthesis, primarily allopurinol and febuxostat. Allopurinol is a xanthine oxidase inhibitor, which mainly works by preventing the conversion of hypoxanthine and xanthine into uric acid through the inhibition of xanthine oxidase. Febuxostat, on the other hand, is a newer xanthine oxidase inhibitor and may be more effective than allopurinol in lowering blood uric acid levels. Another category includes drugs that promote the excretion of uric acid, suitable for patients with normal renal function and hyperuricemia. These mainly include probenecid, benzbromarone, and some use of thiazide diuretics, though their effectiveness for hyperuricemia is somewhat controversial. (Specific medications should be taken under the guidance of a physician.)

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Written by Li Hui Zhi
Endocrinology
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What are the symptoms of hyperuricemia?

Some patients with hyperuricemia are asymptomatic, while others may suffer from complications such as gouty arthritis, gouty nephropathy, and tophi. Gouty arthritis is very common clinically and is primarily characterized by localized joint redness, swelling, heat, and pain. The commonly affected joints include the first metatarsophalangeal joint, ankle joint, and wrist joint. In cases of gouty nephropathy, patients may exhibit high levels of uric acid and increased creatinine levels, which may manifest as frequent urination, nocturia, and swelling of the lower limbs. If gout crystals deposit in the joints, they can form tophi, leading to joint deformities and restricted movement.

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Treatment of Hyperuricemia with Medication

The treatment of hyperuricemia primarily involves dietary control, focusing on low-purine foods, increasing water intake, and maintaining regular exercise. Additionally, alkalizing the urine using sodium bicarbonate to keep the urine pH between 6.2 and 6.9 can help facilitate the excretion of uric acid. It's also important to avoid medications that can increase uric acid levels. For reducing uric acid, treatments mainly include probenecid, which can increase the excretion of uric acid, and febuxostat, an alternative to allopurinol, though side effects of these medications should be noted. Therefore, it is advised for patients with hyperuricemia to consult a doctor at a reputable hospital before taking any medications.

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Written by Zhang Jun Jun
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Pre-symptomatic hyperuricemia

Hyperuricemia in the preclinical phase can be asymptomatic, only showing fluctuating or persistent hyperuricemia during blood tests. From the increase in uric acid to the onset of symptoms, it can generally take several years to decades. Additionally, some changes in the kidneys due to the deposition of uric acid can cause manifestations of gouty nephropathy. Early stages may present intermittent proteinuria and increased urine foam. As the condition progresses, the kidney's concentrating ability may decrease, resulting in increased nighttime urination. Further progression can lead to renal insufficiency, elevated creatinine and urea nitrogen, and possibly swelling and hypertension. In severe cases, acute renal failure may occur, showing symptoms of oliguria or anuria. This type of uric acid nephropathy is primarily due to the deposition in the kidneys, causing episodes of kidney stones and back pain, with stone episodes also accompanied by hematuria. Therefore, the main presentations are associated with the deposition of uric acid in the kidneys during the preclinical phase of hyperuricemia.

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How is hyperuricemia caused?

Hyperuricemia is mostly asymptomatic, meaning there are no uncomfortable symptoms. It is usually discovered during physical examinations or blood tests when the uric acid level is found to be elevated, around 420, which is considered hyperuricemia. What causes it? It is mainly caused by poor lifestyle habits, such as long periods of drinking alcohol, excessive intake of animal organs, seafood, barbecue, and too much protein intake. Additionally, some people may develop high uric acid levels due to prolonged use of diuretics. When hyperuricemia occurs, it is essential to change lifestyle habits, but at this time, no special medication treatment is needed.