Princess Beatrice's simple technique used to revert to her pre-pregnancy weight has been explained.
The princess, who turns 34 today (August 8), gave birth to Sienna Mapelli Mozzi in September 2021.
The father - and Princess Beatrice's husband - property developer and CEO Edoardo Mapelli Mozzi, was by her side to welcome their daughter into the world.
An expert has recently revealed how Princess Beatrice could have lost the pregnancy weight so quickly, after royal fans spotted what incredible shape the new mother was in during the Queen's Jubilee.
Princess Beatrice's diet
Princess Beatrice is said to have followed a balanced diet and exercised regularly, but an expert has explained what other methods might have helped her.
According to Dr Charlotte Norton, Medical Director at The Slimming Clinic, Princess Beatrice used a natural method to initially lose weight after giving birth to baby Sienna.
In an interview with the Express, Dr Norton said: "In order to achieve sustainable weight loss, it is likely that the Princess would have had a high-fibre diet consisting of foods such as avocados, berries, beans, broccoli and more."
She continued: "Coupling a healthy and nutritious diet with exercise would have also contributed to her weight loss."
Princess Beatrice's post-pregnancy weight loss
Dr Norton also explained that if Princess Beatrice was breastfeeding, that could have played a major factor in weight loss.
On average, breastfeeding burns between 500 and 700 calories a day, and it is thought the royal princess could have the pounds just from feeding her child.
During the interview, the doctor also explained that water intake aids the removal of toxins and can allow the body to burn fat with much more ease.
Maintaining hydration during the day can go a long way to keeping fit and healthy.
Dr Norton said: “Drinking a glass or two of warm water first thing in the morning can aid in weight loss and belly fat reduction.”
What is a high-fibre diet?
According to the NHS, most of us need to eat more fibre and fewer added sugars in our diet. Eating plenty of fibre is associated with a lower risk of heart disease, stroke, Type 2 diabetes and bowel cancer.
High-fibre foods consist of breakfast cereal like Weetabix or porridge oats, potato skins, nuts and raw vegetables.
Government guidelines say our dietary fibre intake should increase to 30g a day, as part of a healthy balanced diet.