01
Supplement with Vitamin D3 5000 IU daily with a fat-containing meal for absorption
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Nutrient Levels
Vitamin D
A vitality indicator measuring your body’s primary androgenic hormone — central to muscle, mood, libido, and metabolic health.
Latest Reading
38ng/mL
Average· March 15, 2026
Optimal Range
50–80ng/mL
Peak performance zone
Average Range
30–100ng/mL
Population norm
6-Month Trend
+0ng/mL
Rising
✦ Personalized analysis
Updated Apr 20, 2026
Your testosterone is in decline. Here’s what your data is saying.
Your Vitamin D at 38 ng/mL is above the deficiency threshold but below optimal (50-80 ng/mL). This suboptimal level may be contributing to your low testosterone and could impact immune function, mood, and bone density over time...
Section 01 · Trend
Your trajectory over time
Optimal
Average
Out of range
Sharpen the model
Help us know you better.
The more you tell us — sleep, training, stress, supplements — the more precise your insights become.
Section 02 · The breakdown
What you need to know
At 38 ng/mL, you're in the 'insufficient' range. While not deficient, this level doesn't provide the full protective and performance benefits of optimal vitamin D status.
Section 03 · Take action
How to improve
02
Get 15-30 minutes of midday sun exposure when possible (UV index > 3)
03
Retest in 8-12 weeks to confirm you've reached 50-80 ng/mL target range
Section 04 · Cross-references
How your other markers connect
#
Marker insight
01
Low Vitamin D is directly correlated with lower testosterone production — optimizing may boost your Total T by 20-25%
02
Vitamin D supports thyroid function — your TSH is currently fine but optimal D helps maintain that
03
Vitamin D influences SHBG levels — maintaining optimal D helps keep the testosterone binding balance healthy
Section 05 · Did you know
Three things worth your attention
01
Vitamin D is actually a hormone precursor, not a vitamin — it affects over 1,000 genes in your body
02
Glass blocks UVB rays — sitting by a sunny window does not produce vitamin D in your skin
03
Vitamin D3 should always be paired with K2 (MK-7) to ensure calcium goes to bones, not arteries
Section 07 · Reference
The science, the basics
Baseline