(NewsNation) — A popular diet could be the culprit behind slow hair growth, research from Westlake University in Zhejiang, China, found.

The clinical trial tested whether intermittent fasting — or cycling between fasting and non-fasting periods throughout the day — could disrupt hair growth.

Commonly used intermittent fasting schedules typically allow dieters an eight-hour window to eat, which slows hair follicle regeneration, data found.

Researchers say the effect is apparent, independent of calorie reduction or changes to a person’s circadian rhythm.

What is intermittent fasting?

Intermittent fasting, which involves eating during a six-to-eight-hour window and fasting for the remaining 16 to 18 hours, has increased in popularity over the past 10 years. Studies have suggested that diet can help with weight loss, decrease the risk of diseases like cancer, lower blood pressure and boost energy. 

The theory behind time-restricted eating is that it supports the circadian rhythm, or the body’s internal clock.

Spending more time in a fasting state may boost the body’s processes that govern blood sugar and fat metabolism, scientists say.

Previous research has also linked the diet to an increased risk of colon cancer, and cardiovascular death among other health concerns.

However, experts caution against swearing off the regime altogether, instead recommending patients talk through any eating restrictions with a doctor.

NewsNation partner The Hill and The Associated Press contributed to this report.