WEIGHT LOSS PILL TYPE: L-phenylalanine is a nonessential amino acid, which means the body produces it. It is similar in its chemical structure to phenylpropanolamine (PPA), which has been removed from the market for safety reasons, but differs in how it affects the brain.
SOLD AS: Tablets, capsules, typically 500 mg. phenylalanine comes in three forms: L- , D- , and DL-phenylalanine. The L-form is the most common and is the one that may be helpful for obesity.
BACKGROUND/RESEARCH: The treatment of depression is one of the main uses for L-phenylalanine. However, studies show that L-phenylalanine levels are low in people who are obese, which suggests that supplementation with this amino acid may help with weight loss.
WHAT IS IT SUPPOSED TO DO: phenylalanine may suppress appetite because it promotes the production of cholecystokinin (CCK), a neurotransmitter that signals the body to stop desiring food.
HOW TO TAKE IT: Experts disagree on how to use L-phenylalanine and whether it is an effective Appetite suppressant. Some researchers recommend taking 100 to 500 mg before retiring; others say to take it before each meal. In either case, experts recommend never taking ‘L-phenylalanine for longer than 3 weeks without a break and only taking it while under medical supervision.
SIDE EFFECTS: At high doses (1,500 mg or more), L-phenylalanine can cause anxiety, increased blood pressure, and headache. Report any side effects immediately to your doctor.
PRECAUTIONS: Do not take L-phenylalanine if you are pregnant or nursing, if you get migraines, if you are allergic to food proteins (e.g., wheat, eggs, and meat), or if you have diabetes, high blood pressure, or phenylketonuria (PKU, an inability to process L-phenylalanine). Avoid Lphenylalanine if you have existing malignant melanoma cells, as this amino acid can promote cell division. Taking L-phenylalanine supplements may cause an amino-acid imbalance or eye lesions. Therefore, it is best to take a general amino-acid supplement along with L-phenylalanine to help maintain amino-acid balance in the body.
Weight Loss Products containing L-phenylalanine
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