What Foods Are High In Phenylalanine?

What is a phenylalanine diet?

The diet for PKU consists of a phenylalanine-free medical formula and carefully measured amounts of fruits, vegetables, bread, pasta, and cereals.

Many people who follow a low phenylalanine (phe) food pattern eat special low protein breads and pastas..

What is the life expectancy of someone with phenylketonuria?

PKU does not shorten life expectancy, with or without treatment. Newborn screening for PKU is required in all 50 states.

Is PKU a disability?

In order to qualify for Social Security Disability benefits due to a diagnosis of phenylketonuria, you must be able to prove that your condition prevents you from performing any type of substantial gainful work activity.

How much phenylalanine is in an egg?

Munks et al. (4) found 5.8 per cent phenylalanine and 4.8 per cent tyrosine in the protein of whole eggs.

Does phenylalanine affect blood pressure?

Tyrosine or phenylalanine also lowered blood pressure, but aspartic acid or methanol produced no significant effects. Co-administration of aspartame with valine, a large neutral amino acid that competes with phenylalanine or tyrosine for brain uptake, attenuated aspartame’s hypotensive effect.

Does chocolate have phenylalanine?

Chocolate contains an amino acid, phenylalanine, which is involved in making dopamine, a neurotransmitter that can regulate mood. It stimulates your metabolism and nervous system, which could be why some people turn to chocolate when feeling low.

What happens if someone with PKU eat protein?

A dangerous buildup of phenylalanine can develop when a person with PKU eats protein-rich foods, such as milk, cheese, nuts or meat, and even grains such as bread and pasta, or eats aspartame, an artificial sweetener. This buildup of phenylalanine results in damage to nerve cells in the brain.

Can you grow out of PKU?

A person with PKU does not outgrow it and must stay on the diet for life.

What is phenylalanine in Coke?

Phenylalanine occurs naturally in many protein-rich foods, such as milk, eggs and meat. Phenylalanine is also sold as a dietary supplement. The artificial sweetener aspartame (Equal, NutraSweet), which is added to many medications, diet foods and diet sodas, contains phenylalanine.

What is phenylalanine made of?

L-phenylalanine is an essential amino acid and is the only form of phenylalanine found in proteins. Major dietary sources of L-phenylalanine include meat, fish, eggs, cheese, and milk.

What happens when phenylalanine accumulates in the body?

Phenylalanine is an essential nutrient, but some individuals are born with a genetic disorder, phenylketonuria (PKU), that prevents them from metabolizing phenylalanine, and, if untreated, phenylalanine accumulates in the body, becomes converted into phenylpyruvate, and the individual usually develops seizures, brain …

Where is phenylalanine hydroxylase found in the body?

Liver cellsLiver cells contain an enzyme called phenylalanine hydroxylase, which can add this group and convert phenylalanine to tyrosine. Thus as long as this enzyme is functional and there is a reasonable supply of phenylalanine, tyrosine can be synthesized in your body and does not have to be included in the food that you eat.

What foods should you avoid if you have PKU?

People with PKU must avoid foods that are high in protein like meat, fish, poultry, dairy, soy, legumes (dried beans) or nuts. Some fruits and vegetables are higher in protein than others. PHE is in almost everything except sugar, salt, oil, and water.

Why is phenylalanine added to food?

Phenylalanine is an amino acid found in many foods and used by your body to produce proteins and other important molecules. It has been studied for its effects on depression, pain and skin disorders. This article tells you all you need to know about phenylalanine, including its benefits, side effects and food sources.

What are the side effects of phenylalanine?

Side effects may include:Heartburn.Fatigue.Nausea.Constipation.Dizziness.Headache.Anxiety and hypomania (a milder form of mania)Sedation.More items…•

What foods do not contain phenylalanine?

Foods such as meat, fish, eggs, milk, cheese, nuts and pulses are excluded as they contain high levels of phenylalanine. Vegetables and fruit are allowed in measured amounts only! Special low protein bread, pasta, biscuits and flour are used to supplement the diet and ensure adequate calorie intake.

How do you reduce phenylalanine?

The most effective treatment is restriction of phenylalanine in diet provided through different strategies including combination of low‐protein foods, hydrolyzing of protein‐rich foods, or use of protein substitutes.

Why is phenylalanine toxic to the brain?

The high plasma phenylalanine concentrations increase phenylalanine entry into brain and restrict the entry of other large neutral amino acids. In the literature, emphasis has been on high brain phenylalanine as the pathological substrate that causes mental retardation.