Does fennel contain a high level of purines?
Generally speaking, fennel does not contain high levels of purines. The detailed explanation is as follows:

Fennel contains only low levels of purines, making it a low-purine food. Purines are substances found in many foods, and fennel, as a common vegetable and seasoning, contains significantly lower levels of purines than high-purine foods such as organ meats, seafood, and concentrated meat broths. Moderate consumption of fennel will not significantly raise uric acid levels in the body. Individuals needing to control purine intake, such as those with gout or hyperuricemia, can reasonably include fennel in their daily diet without excessive concern about worsening their condition due to fennel consumption.
Fennel is rich in various nutrients, including vitamins B1, B2, and C, carotene, and dietary fiber. It has multiple health benefits, such as promoting digestion, relieving gas and pain, alleviating dysmenorrhea, and improving gastrointestinal function. However, excessive consumption of fennel should be avoided, as it may cause symptoms of internal heat (heatiness) in some individuals.