NVDM athlete collection · 7 reported markers & insights
Vitamin D & Metabolic Panel
Check vitamin D. Track metabolic health.
7 reported markers, profiles and estimates · Finger-prick collection.
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Your starting point
Who is this for?
For athletes with known low vitamin D, limited sun exposure or a reason to review supplementation, alongside metabolic health.
The endurance connection
Why it matters.
Vitamin D supports bone and muscle health. Metabolic reporting adds a longer-term view. Bone stress injuries also require assessment of training load, fueling and bone health, not vitamin D alone.
IOC: energy availability and athlete health ↗Know what you’re measuring
Every marker, explained.
Vitamin D, Lipids, Insulin Resistance, Average Blood Sugars, Inflammation, GGT, Visceral Fat.
Counts follow the store. Profiles and calculated estimates are labeled separately from individual blood measurements.
| Marker | What it can tell you | Why it matters for an athlete |
|---|---|---|
| Vitamin DBone health | Vitamin D status, relevant to calcium absorption and bone mineralization. | Deficiency can affect bones and muscle function. Particularly relevant with deficiency history, limited sun exposure or bone stress injuries. Vitamin D: role in bone and muscle health ↗ |
| LipidsCholesterol | A grouped report of cholesterol and lipid measures. | Supports long-term cardiovascular assessment, even when training and performance feel good. MedlinePlus: cholesterol testing ↗ |
| Insulin ResistanceMetabolic health | Reporting related to how effectively the body responds to insulin. | Metabolic context, not a test of carbohydrate availability for your next session. NIDDK: HbA1c and the three-month view ↗ |
| Average Blood SugarsBlood sugar | Average blood sugar over approximately three months. | Tracks longer-term metabolic health, not race fueling. Iron deficiency and altered red-cell turnover can affect results. NIDDK: HbA1c and the three-month view ↗ |
| InflammationInflammation | An inflammatory signal that requires context about illness and recent exercise. | A hard session or infection can change the result. It cannot identify the cause or diagnose overtraining by itself. IOC: energy availability and athlete health ↗ |
| GGTLiver | An enzyme that contributes to liver and bile-duct assessment. | Alcohol and some medicines can affect it. It is not a direct overtraining marker. MedlinePlus: liver tests ↗ |
| Visceral FatCalculated estimate | An estimate related to fat around internal organs, not a direct imaging measurement. | Adds metabolic-health context. It should not become a weight-loss target during a demanding build. IOC: energy availability and athlete health ↗ |
Baseline · Build · Follow-up
Make testing part of your season.
This is a planning framework for a 12–16-week build. Your results and symptoms determine whether you need an earlier check.
01
Before the build
Collect during a recovered, representative week before increasing training. This gives you a comparison point.
02
During a 12–16-week build
If symptoms develop or previous results were borderline, arrange a targeted check with enough time to act before race week.
03
Between training blocks
Review the trend after recovery. Repeat the markers that answer your next question; a full panel is not automatically needed each time.
How often should you retest?
- Vitamin DWhen treating deficiency, 8–12 weeks can be useful for selected patients. Routine repeat testing is not needed for everyone taking a maintenance supplement. Vitamin D: monitoring treatment response ↗
- Average blood sugarAllow roughly three months to assess a longer-term HbA1c trend. It cannot show whether yesterday’s fueling was enough. NIDDK: HbA1c and the three-month view ↗
New or persistent symptoms deserve assessment between scheduled tests. There is no universal quarterly requirement for every marker.
A result worth comparing
Before you collect.
- Follow your kit instructionsUse the collection and fasting instructions supplied with your kit. Drink water normally; do not arrive dehydrated or deliberately overhydrate.
- Record your contextNote collection time, recent training, illness, sleep, medications and supplements. Do not stop prescribed medication without advice.
- Choose a representative dayFor a resting comparison, avoid collecting immediately after a race, hard workout, overnight travel or while acutely ill. Wait until sleep and hydration are back to your usual pattern.
Turn results into a next step.
Bring your results together with training load, fueling, symptoms and any supplements. Choose one clear action with your clinician or sports dietitian, then agree which markers to repeat and when.
Persistent fatigue, missing periods, recurrent bone stress injuries or unexpectedly abnormal results need clinical follow-up. A normal panel does not rule out RED-S or explain every change in performance.
Evidence and further reading
- NIDDK: HbA1c and the three-month view ↗
- Vitamin D: role in bone and muscle health ↗
- Vitamin D: monitoring treatment response ↗
- MedlinePlus: cholesterol testing ↗
- MedlinePlus: liver tests ↗
- IOC: energy availability and athlete health ↗
These sources explain the biomarkers and testing context. They do not validate these specific kits as a diagnosis of RED-S or a guarantee of improved performance.