ATP: normal levels and causes of low ATP production

I got my new ATP levels a couple of weeks ago and they were at 0.53 nmol/l

my first measurement of ATP levels showed 0.46 nmol/l    (beginning of November 2012)

6 weeks later                                                    0.50               (mid December 2012)

7 weeks later                                                    0.52               (end of January 2013)

and again 6 weeks later                                    0.53               (mid March 2013)

all in all that's roughly a 15% improvement in about 5 month which is not bad at all, still I'm a bit disappointed because the improvement has slowed down so much and nearly stopped alltogether.

I found a paper on normal ATP count in healthy adults and they all had levels around 8.5 nmol/l

unfortunately my computer crashed at some point and I lost the link. If I find again it I'll post it here.

So, the question is: how do I get my ATP count up? The Gesswein protocol has brought some improvements but it's stopped working. Also the danger of overmedicating is relatively high with this protocol (i.e. my Vitamin D problems).


Possible causes of ATP production problems:

1. problems with lack of nutriens 
                                1.1. bad diet /not enough supplements etc.
                                1.2. bad absorption of nutrients
                                1.3. disrupted transport of nutrients to the cells

2. promlems with the transport of nutrients/ATP across the mitochondrial cell membranes
                                2.1. nutrients in
                                2.2. ATP out

3. problems with ATP production itself
                                3.1. not enough mitochondria
                                3.2. damaged mitochondria

4. problems with ATP - ADP recycling


 so that's the big question then, where is the problem? how can I find it out?

I'll be posting more soon