David, I may be biased, but I don't recomend taking vitamin D supplements totally without reference to the actual serum level. I had a result of 1400 nmol/L last week (toxicity starts at serum levels of about 500 nmol/L), from someone who thought he was taking 2000 IU per day. I am still trying to figure out what he has done; perhaps he got the decimal point in the wrong place and was taking 20,000 IU, or perhaps he already had a high level before he started taking the supplement. Although deficiency is widespread, not everybody has a low serum vitamin D level. In spite of what you may read, toxicity is still a real problem. Maybe your years of basking in the Australian sunshine have already put your stores of vit D at the top of the range? Nick 2009/11/25 David Burgess <[log in to unmask]>: > It might be more rewarding to enquire how many of us are taking vit D > supplements based on available evidence that more is better - I know I am. > I made an enquiry on mailbase about interpreting 'raised' PTH values in > patients being screened for osteoporosis roughly 2 years ago. Condensing the > advice I received then I would say there is not much point in knowing a > patients PTH status unless they have symptoms or biochemical evidence of > hyperparathyroidism, or have CRF. Measure vitamin D and treat, or just treat. > Regards, David > > ------ACB discussion List Information-------- > This is an open discussion list for the academic and clinical > community working in clinical biochemistry. > Please note, archived messages are public and can be viewed > via the internet. Views expressed are those of the individual and > they are responsible for all message content. > ACB Web Site > http://www.acb.org.uk > List Archives > http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html > List Instructions (How to leave etc.) > http://www.jiscmail.ac.uk/ > ------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/