Kate Middleton
Discover the secret behind Kate Middleton's pregnancy glow. Pictured: Middleton attends a reception on World Mental Health Day to celebrate the contribution of those working in the mental health sector across the UK at Buckingham Palace on Oct. 10, 2017 in London. Getty Images/Heathcliff O'Malley

Kate Middleton just made her first public appearance after Kensington Palace confirmed her third pregnancy, and she was glowing.

The Duchess of Cambridge is suffering from hyperemesis gravidarum or severe morning sickness. Due to the illness, she was on bed rest for a couple of weeks. The condition also stopped her from fulfilling her royal engagements and from accompanying Prince George on his first day of school. Fortunately, Middleton seems to be feeling well enough to attend the World Mental Health Day reception, which marked her first public appearance. And Middleton certainly did not disappoint the public when she graced the event in high spirits.

For those wondering how Middleton maintains her beauty and glow, the Duchess of Cambridge is reportedly using Beuti Skincare. The brand just launched its new product, Pomegranate Glow Enzyme Cleanser, which costs $55. Pomegranates are a symbol of fertility and are popular for giving skin a boost, People reported.

"When I knew that she had three bottles of it and was actually using it, it got me really excited to bring out more products. I was just ecstatic," Leila Aalam told People when she learned that Middleton is a fan of her Beauti Sleep Elixir.

The product is an all-natural blend of 14 plant-based oils that fight inflammation, redness and aging. After a year, she developed a multi-purpose gel-balm hybrid, and the royal mom-of-two was the first to receive the item.

"I recently hand-delivered a box of products to Kensington Palace myself, so I know she received them," Aalam said. "The pomegranate enzymes act like a gentle glycolic acid to exfoliate and renew, which is perfect for Kate's skin right now."

Aalam added that her new product "sloughs away" dead skin cells. It is anti-inflammatory for those with sensitive skin cells. In addition, it soothes blemishes that often appear during pregnancy. "If her skin is suffering at all, it will bring back her glow," the beauty entrepreneur said.

In related news, while Middleton's beauty and glow during her first public appearance were noticeable, many questioned her tiny baby bump. In fact, the Duchess of Cambridge was bump-shamed.

A number could not believe that she is pregnant, considering her frame and almost unnoticeable baby bump. Some of the comments on Middleton's photo from the event called her "malnourished" and "emaciated." On the other hand, many were also happy that she's doing better and is back to doing her royal duties.