By what percentage do the active ingredients in Rejuvenator increase from Mild to Regular to Ultra? It doesn’t work that way. It’s not a percentage difference. However you could say if ultra is the max, medium is about half and mild is about a third of medium. Last Update: October 20, 2018 October 20, 2018 2376FAQ’sRelated Knowledge Base Posts -Would our peptides interfere with chemotherapy in any way?How should you handle itchiness, erythema, and edema if experienced with PEPTI-a.c.n.e.?How do the multiple peptide sequences within PEPTI-a.c.n.e. work?