Posted by tea on January 24, 2010, at 5:01:22
In reply to Re: CFS! Lymes? CD? Cortisol fasting? Salty taste?, posted by bleauberry on January 23, 2010, at 12:03:12
Sigh.
The short answer was, yes you need to fast.Long answer.
I've had both blood tests(morning and afternoon), and just morning only.
I've also has the 4 times a day blood tests. With me, they all agreed, but I did the blood tests as I outlined in previous post on this thread.
Some docs like the blood tests better as they have found that the saliva tests can be "altered" bu the swabs used for collection and show a 'low cortisol" which is not "real" but just the cortisol is destroyed by the swab.
(some docs only offer saliva as they are not able to write scrips for blood tests too)
My saliva test didnt use swabs ..just spat into the container.
That said plastic containers can and do alter test results(and yet, they do continue to use them in collecting blood(last few years) and saliva and in studies..even though they have found they have wrecked of some:-). It's ease of use argument!Not just me, but many people I have known have had consistent results between saliva and blood test when they have done both in the outlined manner..actually so far, noone has had differing results, unless they have not fasted or have exercised etc in the morning.
That said, saliva not using any swabs, is far easier for collection-do just as get out of bed(I did).
My main problem was I just couldnt stay awake to midnight..so I took my night one at about 11Pm..and I was soo..tired I coudlnt get off the pillow but managed to take it at the itme lying down. It came out as undetectable (the "midnight" saliva one..which is how I felt. Obviously not truely accurate as I would have been dead, but reflected how I felt for sure!)
You have to go with the kind your doc prefers, but try to get a morning and aft one (same day is necessary to show anything), after a good nights sleep and morning as descibed for more likely meaningful useful results.
poster:tea
thread:934569
URL: http://www.dr-bob.org/babble/20100122/msgs/934844.html