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SkinCited

Collagen Peptides for Stretch Marks

D

Preliminary evidence suggests collagen supplementation may support skin elasticity, potentially reducing stretch mark severity. Very limited direct evidence.

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The Bottom Line

            
            
Preliminary evidence suggests collagen supplementation may support skin elasticity, potentially reducing stretch mark severity. Very limited direct evidence.

            
            
        

    











    
    

        
        

            

  
Key Statistics





            


    

        
2

        
Studies

    

    

        
120

        
Participants

    

    

        
            
            ↑
            
        
        
Positive

    

    

        D

        
Grade

    




        


        
        

        
        
        

            

  
Dosage & Usage





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


            
            

                
Commonly Used Dosages

                

                    
                    

                        
general:

                        
2,500-5,000 mg/day

                    

                    
                    

                        
skinhealth:

                        
2,500-10,000 mg/day hydrolyzed collagen peptides

                    

                    
                

                
                

                    Upper limit: Not established; well-tolerated up to 15,000 mg/day in trials
                

                
            

            

            

            
            

                Best taken: Can be taken any time; some prefer on an empty stomach for absorption
            

            
        

        

        
        
        

            

  
Safety & Side Effects





            

                
                

                    
Reported Side Effects

                    
    
                        
                        
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                            ⚠
                            Mild bloating or digestive discomfort
                        
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                            Unpleasant aftertaste (some marine collagen)
                        
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                            Rare allergic reactions (fish or shellfish-derived)
                        
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                            ⚠
                            Possible calcium elevation (shark cartilage-derived)
                        
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Known Interactions

                    
    
                        
                        
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                            ●
                            No significant drug interactions documented
                        
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                            ●
                            May theoretically interact with calcium supplements (some sources contain calcium)
                        
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                        Tolerable upper intake: Not established; well-tolerated up to 15,000 mg/day in trials
                    

                

                
            

            

                Always consult your healthcare provider before starting any supplement.
            

        

        

        
        
        

            

  
Frequently Asked Questions





            




    
    

        
            Does Collagen Peptides help with Stretch Marks?
            
        
        

            Based on 2 studies with 120 participants, there is preliminary evidence that needs more research that Collagen Peptides may support Stretch Marks management. Our evidence grade is D (Very Early Research).
        

    

    
    

        
            How much Collagen Peptides should I take for Stretch Marks?
            
        
        

            Studies have used various dosages. A commonly studied range is 2,500-5,000 mg/day. Always consult your healthcare provider before starting any supplement regimen.
        

    

    
    

        
            Are there side effects of Collagen Peptides?
            
        
        

            Reported side effects may include Mild bloating or digestive discomfort, Unpleasant aftertaste (some marine collagen), Rare allergic reactions (fish or shellfish-derived), Possible calcium elevation (shark cartilage-derived). Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
        

    

    
    

        
            How strong is the evidence for Collagen Peptides and Stretch Marks?
            
        
        

            We rate the evidence as Grade D (Very Early Research). This rating is based on 2 peer-reviewed studies with 120 total participants. The overall direction of effect is positive.
        

    

    




        

        

        
        
        

            

  
Related Evidence





            

                

                
                
                
            

        

        

    


    
    












    

        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.