The pre made in a bottle is just not nice ..... Make your own ... Mayo is easy ... Then just mash the blue chease and oilve oil into that ... If you have the blender out for making the Mayo then leave it running to add the chease and oil .... As the wife says (again) it's simple ! Must add I did try to make it myself once .. Don't know where I went wrong .. But got scrambled chease egg ... So it went in the bin !If you make your own, it could be low carb.
If you buy it in a bottle, it will likely have added sugar (and be not as tasty as home made)
If you buy it in a restaurant, it could go either way.
As Enclave suggests, test and see how you get on with it.