| SERUM C is designed to work on improving existing sun damage, 
                      therefore, prevention of further damage is best so sunblock 
                      is highly recommended in order that further premature aging 
                      be avoided. SERUM C may be used with alpha hydroxy acids, 
                      glycolic acids, or Retin A. However, unless specified, it 
                      is recommended that SERUM C be applied at opposite times 
                      of the day when using the products listed, due to their 
                      exfoliating qualities.
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