For the ones who are scared about swallowing a MAX 0.1 % solution of H202, you can find a 42 pages article justifying the approval by the E.E.C (after the F.D.A) of thooth bleaching strips containing up to 6% of H202.
This scientific article is interesting as it shows that at concentration under 0.1% H202 is totally harmfull to the body. Furthermore you will find at page 16 that survival rate for mices receiving respectively 0.1 and 0.4 % of H202 in all their drinking water for about two years was up to 20 % higher than for the control mices. The brand of mices used was C57BL/6J. The study doesnot say if these mices were catalase deficient or not. (catalase allow the transformation of H202 into water plus oxygen in the cells)
to read it use google search engine and type simply