Supplements > Phenylalanine > SideEffects Supplements with Similar Side Effects as: Phenylalanine Below is a list of side effects for this supplement along with supplements with similar side effects.   gastroesophageal reflux disease 5-Hydroxytryptophan (5-HTP) Glucosamine Iron Red Yeast Rice headaches Copper Ethylenediaminetetraacetic Acid (EDTA) Iron Manganese Melatonin Red Yeast Rice S-Adenosylmethionine (SAMe) Sulfur Vitamin A (Retinol) Zinc nausea and vomiting 5-Hydroxytryptophan (5-HTP) Bromelain Calcium Cartilage Copper Cysteine Ethylenediaminetetraacetic Acid (EDTA) Iron Magnesium Potassium S-Adenosylmethionine (SAMe) Sulfur Vanadium Vitamin A (Retinol) Vitamin D Vitamin E Zinc

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