How much retinol (in %) in this cream?

They say the cream has 2500 UI of retinol... 


  • According to this site, 1 IU (international units) of retinol = 0.3 micrograms of retinol. Therefore, 2500 IUs = 750 micrograms or 0.750 grams of retinol. 

    I assume this is the amount in one tube which has a net volume of 40 mls. Assuming the specific gravity of the cream is about 1.0 (which is close enough) the percentage of retinol in the product is 0.75 gr retinol/40 gr product = 0.01875gr retinol/gr product =  1.875% retinol. 

  • TKS a lot Randy. But why when I use an online conversion the results for 750 micrograms is 0.00075g? I guess I was doing something wrong because my results were too low.
  • Because I'm an IDIOT! I read "micrograms" but did the conversion for "milligrams." Thanks for catching my stupid mistake!

    So it should be: 

    0.00075 gr retinol/40 gr product = 0.00001875gr retinol/gr product =  0.001875% % retinol. 

    That seems WAY to low to be effective so I'm wondering if one of my assumptions is wrong. Maybe the product contains  2500 IU per ml?  But that would make the % too high. Or, maybe it's per application? That might be about right. Unfortunately, I can't find anything on their website that specifies this.  

    Maybe I'm missing something. Does anyone else have thoughts on this? 
Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

In this Discussion