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5-HTP for Appetite Control

C

Double-blind RCT (n=20) found 750 mg/day reduced caloric intake by 38% and produced greater weight loss (1.5 kg vs. +0.2 kg placebo) over 5 weeks. A 12-week crossover trial confirmed reduced carbohydrate and fat intake at 900 mg/day. Sample sizes are small but findings are mechanistically consistent.

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The Bottom Line

            
            
Double-blind RCT (n=20) found 750 mg/day reduced caloric intake by 38% and produced greater weight loss (1.5 kg vs. +0.2 kg placebo) over 5 weeks. A 12-week crossover trial confirmed reduced carbohydrate and fat intake at 900 mg/day. Sample sizes are small but findings are mechanistically consistent.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
4

        
Studies

    

    

        
100

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        C

        
Grade

    




        


        
        

        
        
        

            

  
Dosage & Usage





            
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units


            
            

                
Commonly Used Dosages

                

                    
                    

                        
general:

                        
50-100 mg 1-3x/day

                    

                    
                    

                        
starting:

                        
50 mg/day and titrate up

                    

                    
                    

                        
appetitecontrol:

                        
250-300 mg/day 30 min before meals

                    

                    
                

                
                

                    Upper limit: 500 mg/day; avoid combining with SSRIs, SNRIs, MAOIs, or triptans (serotonin syndrome risk)
                

                
            

            

            

            
            

                Best taken: 30 minutes before meals on an empty stomach
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Reported Side Effects

                    
    
                        
                        
  • 
                            ⚠
                            Nausea
                        
    • 
                        
                        
  • 
                            ⚠
                            Drowsiness
                        
    • 
                        
                        
  • 
                            ⚠
                            GI discomfort
                        
    • 
                        
                        
  • 
                            ⚠
                            Serotonin syndrome risk with contraindicated medications
                        
    • 
                        
                    

                

                

                
                

                    
Known Interactions

                    
    
                        
                        
  • 
                            ●
                            SSRIs (serotonin syndrome risk — NEVER combine)
                        
    • 
                        
                        
  • 
                            ●
                            SNRIs (serotonin syndrome risk — NEVER combine)
                        
    • 
                        
                        
  • 
                            ●
                            MAOIs (serotonin syndrome risk — NEVER combine)
                        
    • 
                        
                        
  • 
                            ●
                            Triptans (serotonin syndrome risk)
                        
    • 
                        
                        
  • 
                            ●
                            Carbidopa
                        
    • 
                        
                    

                

                

                
                

                    

                        Tolerable upper intake: 500 mg/day; avoid combining with SSRIs, SNRIs, MAOIs, or triptans (serotonin syndrome risk)
                    

                

                
            

            

                Always consult your healthcare provider before starting any supplement.
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does 5-HTP help with Appetite Control?
            
        
        

            Based on 4 studies with 100 participants, there is limited but promising evidence that 5-HTP may support Appetite Control management. Our evidence grade is C (Some Evidence).
        

    

    
    

        
            How much 5-HTP should I take for Appetite Control?
            
        
        

            Studies have used various dosages. A commonly studied range is 50-100 mg 1-3x/day. Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of 5-HTP?
            
        
        

            Reported side effects may include Nausea, Drowsiness, GI discomfort, Serotonin syndrome risk with contraindicated medications. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

        
            How strong is the evidence for 5-HTP and Appetite Control?
            
        
        

            We rate the evidence as Grade C (Some Evidence). This rating is based on 4 peer-reviewed studies with 100 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                
                
                

                
                

                    
5-HTP for other conditions

                    

                        
                        
                            Emotional Eating
                            C

                        
                        
                    

                

                
            

        

        

    


    
    












    

        FDA Disclaimer:
        These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.