Mataha is having a bit of a moment – especially in the age group the BBC has dubbed “the matcha generation” (Gen Z).

The TikTok-viral drink, which is packed with antioxidants, is touted as both a luxurious treat and a health booster: it offers potentially anti-inflammatory ingredients, tastes great with strawberry, and looks grid-worthy in a see-through cup.

But, a video by surgeon Dr Karan Rajan revealed, too much can sometimes cause health issues.

Very high consumption over a long period of time can inhibit iron absorption, and women “of reproductive age” (so a lot of the trendy drink’s fans) might be at a higher risk, he added.

Here, we spoke to Dr Suzanne Wylie, GP and medical adviser for IQdoctor, about how much matcha is too much, and why it might affect your health.

Speaking to HuffPost UK, Dr Wylie said that there really may be some health advantages to the popular green drink.

“Matcha, a finely ground powdered green tea, is celebrated for its high antioxidant content, notably epigallocatechin gallate (EGCG), which is linked to various health benefits, including improved focus and metabolism,” she explained.

“However, matcha also contains tannins and catechins, polyphenolic compounds that can bind to non-heme iron (the type found in plant-based foods) in the digestive tract, reducing its absorption.

“This effect is more pronounced in matcha due to its concentrated form, which retains the whole tea leaf, unlike traditional steeped teas.”

Therefore, she explained, it’s important to drink it in moderation.

Wondering how much is too much? “For most individuals, moderate matcha consumption, typically one cup per day, is considered safe and unlikely to cause significant health issues,” she said.

“However, excessive intake, especially when consumed with iron-rich meals or supplements, can lead to decreased iron absorption over time.”

The first step is to drink less of it if you’re having loads, but Dr Wylie said those aren’t the only steps matcha lovers can take.

“It’s advisable to consume matcha between meals rather than with or immediately after meals rich in non-heme iron,” she said.

“Additionally, pairing iron-rich foods with vitamin C can enhance iron absorption. If iron supplementation is necessary, it’s best to take it at least one to two hours apart from matcha consumption.”

Those who should pay particular attention to their intake include vegetarians, vegans, menstruating individuals, and those with known iron deficiencies.

“Symptoms of iron deficiency may include fatigue, weakness, and pale skin,” the GP ended.

If you think you might have iron deficiency anaemia, the NHS says you should see your doctor.