Doctor Xand Praises Kumquats as a Revolutionary Superfood

On November 8, 2025, Dr. Xand van Tulleken and his brother, Chris van Tulleken, discussed the health benefits of a lesser-known fruit, kumquats, on their BBC Radio 4 podcast, What’s Up Docs? Their conversation highlighted the fruit’s unique taste and impressive nutritional profile, suggesting it could be a valuable addition to many diets.

Kumquats: A Nutritional Powerhouse

Kumquats, small and oval-shaped, resemble tangerines and are known for their sharp, sour yet sweet flavor. The fruit derives its name from Chinese, combining ‘gam,’ meaning gold, and ‘gwat,’ another term for tangerines. Remarkably, you can consume the entire fruit, including the peel, which contributes to its unique taste.

According to WebMD, kumquats contain about 13 calories each and are cholesterol-free. They are rich in fiber and antioxidants, making them a nutritious choice for those looking to enhance their health. In a country where approximately 92 percent of the population fails to meet the daily recommended intake of 30 grams of fiber, incorporating kumquats could help address this dietary shortfall.

Insights from the Van Tulleken Brothers

During the podcast, Chris introduced kumquats to Xand, who was initially taken aback by their flavor. As he sampled the fruit, Xand remarked, “These taste like they’re really good for you, because the peel is so bitter, it tastes like medicine.” This playful exchange highlighted the brothers’ engaging dynamic and their willingness to explore new foods.

Chris emphasized the importance of experiencing food in different ways, stating, “I work on food and I was surprised to find a whole common food in the supermarket which I have simply never eaten.” He encouraged listeners to seek out new fruits and vegetables, particularly for families with children. “Go and buy something you haven’t had before,” he said, underlining the value of culinary exploration.

Both brothers advocate for a balanced approach to diet, suggesting that while no single food can be deemed a superfood, incorporating a variety of healthy options is essential. With their combined expertise in nutrition and health, they aim to inspire listeners to make informed dietary choices.

Incorporating kumquats into one’s diet could be beneficial not only for their taste but also for their health benefits. Packed with vitamins C and A, these fruits contribute to immune function, skin health, and overall wellness. Vitamin C is crucial for collagen production and healing, while vitamin A plays a vital role in vision and cell protection against free radicals.

The Van Tulleken brothers’ enthusiasm for kumquats serves as a reminder of the joys of discovering new foods and their potential health benefits. As they continue to advocate for healthier lifestyles, their podcast remains a valuable resource for those looking to enhance their dietary habits.