Swanson Supplements

Our assessment

Based on FDA data, the overall safety profile for this supplement is concerning. The FDA received a total of 1,969 adverse event reports for the brand with 71 products. The most serious finding involves 109 reports of death, which is a critical signal that requires immediate attention from patients and healthcare providers FDA FAERS ↗.

Safety profile

Specific side effects from FDA data include 109 reports of death, 118 reports of nausea, 87 reports of diarrhea, 76 reports of vomiting, 69 reports of fatigue, 67 reports of drug ineffective, 64 reports of dyspnea (difficulty breathing), 57 reports of pain, 54 reports of asthenia (weakness), 52 reports of headache, 52 reports of dizziness, 51 reports of pyrexia (fever), 49 reports of abdominal pain, 45 reports of anxiety, 44 reports of chest pain, 42 reports of pruritus (itching), 42 reports of arthralgia (joint pain), 41 reports of insomnia, 40 reports of malaise, 39 reports of back pain, 38 reports of rash, 37 reports of cough, 37 reports of weight decreased, 37 reports of myalgia (muscle pain), 37 reports of constipation, 36 reports of urinary tract infection, 35 reports of hypoesthesia (numbness), 35 reports of depression, 35 reports of hypertension, 35 reports of edema peripheral (swelling in limbs), 34 reports of decreased appetite, 34 reports of palpitations, 33 reports of fall, 33 reports of confusion, 33 reports of tremor, 32 reports of muscle spasms, 32 reports of hyperhidrosis (excessive sweating), 31 reports of somnolence (drowsiness), 31 reports of tachycardia (rapid heart rate), 31 reports of alopecia (hair loss), 31 reports of weight increased, 30 reports of dyspepsia (indigestion), 30 reports of paraesthesia (tingling), 29 reports of convulsion (seizure), 29 reports of syncope (fainting), 29 reports of pneumonia, 28 reports of chills, 28 reports of erythema (skin redness), 27 reports of sinusitis, 27 reports of vision blurred, 27 reports of bronchitis, 27 reports of contusion (bruising), 26 reports of dysphagia (difficulty swallowing), 26 reports of blood pressure increased, 26 reports of hypokalemia (low potassium), 26 reports of dehydration, 25 reports of amnesia (memory loss), 25 reports of suicidal ideation, 25 reports of abdominal distension (bloating), 24 reports of flatulence, 24 reports of dry mouth, 24 reports of rhinorrhea (runny nose), 24 reports of asthma, 23 reports of hot flush, 23 reports of dysgeusia (taste disturbance), 23 reports of influenza, 23 reports of lethargy, 22 reports of feeling abnormal, 22 reports of dysuria (painful urination), 22 reports of pharyngolaryngeal pain (sore throat), and 22 reports of chest discomfort FDA FAERS ↗.

How it works

Data not available. No mechanism of action or study data was provided for this analysis NIH ODS ↗.

Our recommendation

Given the 109 reports of death and the extensive list of serious side effects including seizure, suicidal ideation, and cardiovascular events, this supplement carries a high safety risk. Patients should only use this product under strict medical supervision. Anyone experiencing chest pain, difficulty breathing, rapid heart rate, confusion, or suicidal thoughts should seek immediate medical attention. Drug interaction data is not available, so it is unknown how this supplement may interact with other medications FDA FAERS ↗.