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Kate Middleton has an incredibly slim physique. The 5’9 mother-of-three is notorious for bouncing back quickly after pregnancy, sliding into her pre-baby clothing in record time. While news outlets have reported that the Duchess of Cambridge has a size 6 figure, some fans claim the camera adds ten pounds, meaning in real life the super svelte royal is closer to a size 2.

There are so many reasons why Kate Middleton is skinny — genetics, diet, and exercise are just a few. But some royal fans are saying she’s looking slimmer than ever lately, and that her weight may have crossed the line into unhealthy territory.

Kate Middleton
Kate Middleton | Max Mumby/Indigo/Getty Images

People can’t help but compare Kate Middleton to Princess Diana

It’s true that some people are just naturally skinny, and old photos of Kate Middleton prove that genetics play a huge factor in how much she weighs. Royal fans were immediately concerned that Prince William’s wife could potentially suffer from an eating disorder like Princess Diana did. But there is no evidence to support that claim.

“I don’t think we have a problem like Di did with weight,” one royal insider explained to E News. “I don’t think William would put up with it, he’s very attuned to things with Kate, unlike Charles was with Diana.”

Kate Middleton
Kate Middleton | Adrian Dennis – WPA Pool/Getty Images

The Duchess of Cambridge maintains a healthy diet

She has access to any food in the world she wants, and clearly, Kate Middleton takes advantage of that privilege. But instead of going out to dinner every night, the Duchess prefers cooking at home, which means she automatically controls her portions and avoids unhealthy ingredients such as excessive sodium and sugar when she cooks food from scratch.

Kate Middleton is also a fan of the Dukan diet, which she used to drop a few pounds before her 2011 royal wedding. The low-carb diet has French origins and focuses on lots of healthy vegetables and lean protein. Even though the Duchess no longer adheres to this method of eating, she does retain some of the principles she learned while following it.

Besides that, Kate Middleton has an extremely busy schedule and is always on the go. Her activity levels coupled with healthy foods combine to keep her weight in check all the time. She also makes it a point to exercise when she has time and loves doing planks.

Kate Middleton
Kate Middleton | Karwai Tang/WireImage

There’s probably no reason to worry about Kate Middleton

Many royal followers pointed out that Meghan Markle had a more “realistic” body after giving birth to baby Archie in May. Instead of dropping the weight she gained during pregnancy right away, Markle looked a little larger for a few months following her son’s birth.

But some people are just genetically blessed and naturally shed excess pounds easily, especially if they’re breastfeeding like Kate Middleton supposedly does with all her kids.

Yes, Kate Middleton is very thin. But she eats a healthy diet, stays active in her daily life, and takes good care of herself. All the other members of her family, like her mom and sister Pippa, also have thin figures. Based on all the evidence, there’s no reason to worry about her weight.