What is PKU?

A genetic metabolic disorder where the body cannot break down an amino acid called phenylalanine, or Phe.

Usually diagnosed at birth through routine screening of newborns.


About 1 in 12,000 people in the United States have PKU.

There is no cure but patients with PKU can successfully manage the disease with a lifelong diet low in Phe.

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People with PKU cannot eat meat, fish, eggs, milk or dairy products, nuts, or legumes. They must drink a special formula to provide protein replacement.

Untreated, PKU can cause severe intellectual disability, seizures, and other problems.

SOURCES: Cambrooke Therapeutics; National Institutes of Health

What does Cambrooke Therapeutics offer?


Cambrooke Therapeutics, based in Ayer, is the world’s largest supplier of food for people with PKU, or phenylketonuria, a genetic metabolic disorder that prevents the body from breaking down an amino acid called phenylalanine, or Phe, that makes up protein. Here are some products:

Glytactin BetterMilk

A powdered formula to be mixed with water. Made with a natural protein, from whey, that has almost no Phe.

Brookelyn Dogs

Ingredients include yuca, sweet potatoes, and red bell peppers.

Cheese ravioli

Pasta is made from cornstarch and potato starch, since wheat flour has too much protein.

SOURCE: Cambrooke Therapeutics

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