Det skall mycket till för att hinna före King Grub med en artikel
Missade helt tråden. Fulltext rentav. Tack
D-vitaminrekommendationerna verkar tolkas olika: "Although there is disagreement over appropriate cut points of serum concentrations of 25-hydroxyvitamin D (the marker of vitamin D status), commonly used cut points define deficient as a serum 25 hydroxyvitamin D of <50 nmol/L, insufficient as <75 nmol/L, sufficient as >75 nmol/L, and optimal as 100 to 250 nmol/L (Larson-Meyer 2015)."
Internetmedicin har ju fortfarande nuvarande rekommendationer:
< 25 nmol/L D-vitaminbrist
25-50 nmol/L Otillräckliga nivåer
> 50 nmol/L Tillräckliga nivåer
75 nmol/L Optimal nivå
> 125 nmol/L Potentiellt farlig nivå
> 250 nmol/L Potentiellt toxisk nivå
Intressant om förkylningar (som jag postade lite om i D-vitamintråden):
"The breakpoint for contracting a single episode occurred at ~95 nmol/l such that all athletes with concentrations lower than this breakpoint experienced one or more episodes of illness whereas those with higher concentrations had one or fewer episodes. A similar study in endurance athletes reported that a greater proportion of athletes who maintained serum 25(OH)D concentrations of <30 nmol/L presented with URTI symptoms over this time point. The fewest symptoms were reported in those with 25(OH)D concentrations >120 nmol/L (He et al. 2013). Athletes with low vitamin D concentrations also experienced a higher number of days with upper respiratory symptoms and higher symptom-severity scores. Although additional studies are needed to confirm the effectiveness of correcting low vitamin D concentrations through supplementation, a recent randomized, placebo-controlled study in university athletes found that 14-week supplementation with 5000 IU per day of vitamin D3 during winter training significantly increased salivary secretion rates of immune factors, namely cathelicidin and secretory immunoglobulin A (He et al. 2016)."