ve personally taken all three
and never suffered any side effects at all,
and I managed health foods stores for 18 years
and never heard of anyone reporting any side effects. Manukka honey is just another form of honey -- bees pollinating a particular plant that happens to produce a unique antibiotic other honeys don't have. DGL is just a form of common licorice, with the part taken out responsible for most of the side effects commonly reported from licorice (mostly high blood pressure).