jules21 wrote:well, i just got back from the doctor and the verdict is in: vitamin D defficiency.
i'm a bit sus on that as the normal range is 60-160 and i'm 54, which doesn't seem that bad, but i'll soon find out when i head to thailand for some sun..
i also have high cholesterol (2.9 mmol/L when it should be < 2.0). i thought i ate pretty healthily, although i do gorge myself on biscuits..
Kudos to Missy24 for pickin' it ! Except it's not even in the "mild deficiency" territory according to the National Health and Medical Research Council's "Nutrient Reference Values for Australia and New Zealand Including Recommended Dietary Intakes"
the Endocrine Society of Australia and Osteoporosis Australia (2005) defined mild deficiency for adults
as serum 25-OHD levels between 25 and 50nmol/L; moderate deficiency as between 12.5 and 25nmol/L
and severe, below 12.5nmol/L based on various indicators such as increases in parathyroid hormone secretion and various bone indicators
and it could just be seasonal variation
Seasonal changes have been shown to have a significant effect on the cutaneous production of
cholecalciferol (Pettifor et al 1996, Webb et al 1990). In the winter months in temperate latitudes, solar
UV light in the wavelength range of 290â€“320 nm is absorbed by the atmosphere. People also spend less
time outdoors and wear more clothing. For this reason, vitamin D deficiency is more common in the
winter months (Holick 1995).
Despite the sunny climate, a seasonal variation in vitamin D levels also occurs in Australia. In the
Geelong Osteoporosis Study, the mean vitamin D levels for winter were 58 nmol/L compared with
70 nmol/L in summer (Pasco et al 2001). However, after regular sun exposure, people under the age of
50 can produce and store approximately 6 monthsâ€™ worth of vitamin D, so vitamin D stored in the body
is available during the winter when production is minimal (Holick 1996). However, in older people, the
efficiency of cutaneous synthesis of vitamin D is significantly less than that in younger people (Holick et
al 1989, Need et al 1993).
Not saying that it's not worth trying to get a little more sun and a little less time in the office. Just that you
shouldn't be too alarmed about it.
Cholesterol is harder to fix - biscuits (especially the tim-tams, mint-slices etc.,.) aren't very compatible with fixing it. But the good news is that you can substitute fresh fruit, like strawberries, cherries, mangoes etc,.. and get all the sweetness you crave.