Nutrients
Optimal
Vitamin D
25-hydroxy vitamin D. The storage form of vitamin D, which your skin makes from sunlight and which most Nordic winters run short on.
Sample result · Nov 2026
Optimal 40 to 60
43
ng/mL
+22 in 6 months
10
30
50
70
TREND · SAMPLE MEMBER
From 21 to 43 in six months.
In range since October.
Optimal 40 to 60
Vitamin D
First test
21
ng/mL · Nov 2024
Latest
43
ng/mL · Nov 2026
Change
+105
% over 7 tests
Next test
Feb
2027 · in 3 months
WHAT IT MEASURES
Vitamin D is made in your skin from sunlight and stored in your body. We measure the storage form for a stable reading.
WHY IT MATTERS
Low vitamin D is linked to weaker bones, more infections and low mood, especially in winter.
WHEN TO RETEST
Every three months in winter, then each spring and autumn.
WHAT MOVES IT
Five levers, ranked.
Based on clinical evidence. Your clinician picks the ones that fit you.
Daily supplement
1,000 to 2,000 IU with a meal.
Midday sun
Fifteen minutes in summer.
Oily fish
Salmon, mackerel and sardines.
Take it with fat
Vitamin D absorbs better with food.
Check magnesium
Needed to activate vitamin D.
RELATED MARKERS
Usually read together.
Know your
Vitamin D.
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