According to a new study from the University of East Anglia, time-restricted fasting diets may lead to fertility issues. The study, published on April 12th, 2023, reveals that time-restricted fasting has differing impacts on reproduction in male and female zebrafish. Importantly, the study found
Intermittent fasting is a dietary approach that involves alternating periods of eating and fasting. It does not restrict specific foods, but rather focuses on when to eat them. Some common methods of intermittent fasting include the 16/8 method, where individuals fast for 16 hours and eat during an 8-hour window, and the 5:2 method, where individuals eat normally for 5 days and restrict calorie intake to 500-600 calories for 2 non-consecutive days.
Prof Alexei Maklakov, from UEA’s School of Biological Sciences, said: “Time-restricted fasting is an eating pattern where people limit their food consumption to certain hours of the day. It’s a popular health and fitness trend and people are doing it to lose weight and improve their health. The research team studied zebrafish to find out what happens when individuals are exposed to food during and after a period of fasting. They measured how males and females allocate resources to body maintenance versus the production and maintenance of sperm and eggs, and the quality of the resulting offspring.
“Importantly, some of the negative effects on eggs and sperm quality can be seen after the animals returned to their normal levels of food consumption following time-restricted fasting.
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