Yeah I had to send in a hair sample to a lab to be tested. I was skeptical of these, but my fiancee did one to identify trigger foods and the day before she got her results, she was in excruciating pain after having a pizza. Her results stated she has an acute intolerance to rocket, which her pizza was covered in!

I did an intolerance test for sh*ts and giggles last year and apparently I have an accute reation to:

Yeast
Lactose
Blue Cheese
Stliton
Whisky

My diet consists mainly of yeast and lactose, so I'm screwed when these finally "kick" in

Whisky gave me really bad stomach pain when I used to drink it, now I understand why and I get incredibly bloated from beer.

It didn't come up in a test but I can't tolerate anything with alcohol sugars in it, so a lot of protein bars and sugar free stuff is out for me. I had 2 protein bars with maltitol in it, without realising and was farting/on the toilet for most of the day

Is the test they do using your hair? Thinking about getting one so looking for advice.

I'm type 2 diabetic if I eat sugar -- I don't so I keep my 'number' down below the type 2 threshold. So I looked up which artificial sweetener would be best - f*ck me the cr*p they dish out - when you look at the chemical description, who produces the stuff and the testing any sane person wouldn't go near this stuff - one commercial sweetener has the carbon atoms replaced by chlorine atoms in the glucose molecule using nano-technology- no thanks! I ues this Xylitol from wood and plants - same intensity as sugar, not 600 or 6000 times sweeter than sugar. Bit of a bitter after taste but it works in certain things - banana cakes and drinking chocolate, but is ghastly on porridge, alright in coffee but I don't take sugar any way.