Cortisol - saliva test or blood test ?

[Guest guest]

Hi,

I read whole article:

http://www.livingnetwork.co.za/healingnetwork/adrenals_thyroid.html

and there is written:

" The only reliable test is the cortisol saliva test. "

Could you tell me why blood test is not reliable?

I thought blood test is better.

I am asking, because my cortisol saliva test results from

http://www.aeron.com were :

8 am - 0.77 ng/ml (range 1.0 - 8.0)

12pm - 0.84 ng/ml (range 0.4 - 2.5)

4 pm - 0.73 ng/ml (range 0.2 - 1.3)

10pm - 0.13 ng/ml (range 0.1 - 0.6)

So - my resul at 8 am was below range.

Saliva was delivered very quickly to the lab.

Then - I have done cortisol blood test at 8am and I was surprised as

my result was in normal range:

19.5 ug/dl (range 5 - 25)

Any ideas which result is reliable ?

Thank's!

djur1