I use estee lauder foundation , but when my skin is worst and need a concealer I use kat von D lock-it tattoo concealer. I actually use it as a foundation all over my face when I need more cover and not use any foundation . it does not make my skin worse and it does cover more .. I don't know if its least harmful but Is the only concealer as of right now that matches my skin color . estee lauder did not match me and it didn't cover as much any way..

I use Studio Gear Hidden Agenda concealer and I love it. Been on it 10 years now. Covers well and never gives me blackheads like powders and foundations, which don't cover old acne marks on me anyway. I have sensitive/oily/acne prone/combination/allergy prone skin. But honestly even when i used to use neutrogena's concealer that worked very well also. I also can't say if they are less harmful, but they work very well for me.

Can I ask what you're looking to avoid?

I have sensitive, combination skin (very fair) and have been using Make Up Forever concealer for years. Never had any problems with it. It's about 30 dollars and each small tube lasts about a year, assuming you aren't going to use it for all-over coverage!

I use Studio Gear Hidden Agenda concealer and I love it. Been on it 10 years now. Covers well and never gives me blackheads like powders and foundations, which don't cover old acne marks on me anyway. I have sensitive/oily/acne prone/combination/allergy prone skin. But honestly even when i used to use neutrogena's concealer that worked very well also. I also can't say if they are less harmful, but they work very well for me.

Can I ask what you're looking to avoid?

This and mac studio finish, awesome products.

I use them as foundation, sheering them out as needed, Wayne Goss style.

I've been using Kat Von D's Lock-It concealer and it's great. Heavy duty coverage and it doesn't break me out. If your looking for a cheaper alternative, get the Hard Candy Glamoflauge concealer from Walmart. It's cheap and personally, it didn't make my skin any worse.