hypophosphatemia (XLH)

XLH is a hereditary, progressive, and lifelong condition that affects both children and adults. Learn more about XLH and recognize early symptoms to help delay disease progression.



Elizabeth, her mother Jean, and her son Simon, living with XLH


AGE 34

“Just knowing that there was an answer and a reason why was probably the best part of learning my diagnosis.”

XLH may be a rare disease, but you are not alone. Learn how others are living with XLH.


Start Here

X-linked hypophosphatemia is a hereditary condition

XLH is an inherited condition, which means it runs in families. In some cases, XLH may occur spontaneously.

Learn more about XLH

X-linked hypophosphatemia is progressive - symptoms can arise and worsen at any time

New symptoms of XLH may appear at any age and can worsen over time. Understand the progression of XLH.

Recognize the symptoms

Symptoms of X-linked hypophosphatemia can be managed, but there is currently no cure

Individuals with XLH will continue to experience symptoms throughout life. These symptoms may be managed.

Learn how XLH is managed

If you suspect X-linked hypophosphatemia, talk to your doctor or an XLH specialist

As a parent, you are the first to recognize when things are out of the ordinary with your child. As an adult, you know yourself best. Trust your instincts and raise your concerns with your or your child’s doctor.

Take the next step