NVDM athlete collection · 6 biomarkers
Comprehensive Female Hormone Panel
Put hormone changes in context.
6 biomarkers · Finger-prick collection.
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Your starting point
Who is this for?
For women whose cycle, recovery or wellbeing has changed, or who want to follow vitamin D and reproductive hormone results.
The endurance connection
Why it matters.
Estradiol and correctly timed Progesterone contribute to investigating menstrual disruption. Vitamin D adds bone-health context. Missing periods or bone stress injuries deserve a RED-S assessment, even with normal blood results.
IOC: energy availability and athlete health ↗Know what you’re measuring
Every marker, explained.
Total Testosterone, Estradiol, Progesterone, Cortisol, DHEA-S, Vitamin D.
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 |
|---|---|---|
| Total TestosteroneHormones | Total circulating testosterone, including protein-bound hormone. | In men, persistently low morning levels with low libido or poor recovery warrant assessment. In women, a low result is not a standalone RED-S indicator. Endocrine Society: testosterone assessment ↗ |
| EstradiolHormones | An estrogen involved in reproductive function and bone health. | Low levels alongside missing periods raise concern about energy availability and bone stress injury risk. Cycle timing is essential. IOC: energy availability and athlete health ↗ |
| ProgesteroneHormones | A properly timed result can support evidence that ovulation occurred. | Underfueling can disrupt ovulation. Low progesterone early in the cycle is expected, not evidence of RED-S. ASRM: cycle timing and progesterone ↗ |
| CortisolHormones | An adrenal hormone with a strong daily rhythm. | Sleep, collection time and recent exercise influence the result. A single value does not grade training stress or diagnose overtraining. MedlinePlus: cortisol testing ↗ |
| DHEA-SHormones | An adrenal androgen that changes with age and some adrenal conditions. | Adds adrenal hormone context. It is not a validated score for recovery, fatigue or fueling adequacy. MedlinePlus: DHEA-S ↗ |
| 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 ↗ |
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 ↗
- Cycle-related hormonesCompare the same cycle phase. A clinician may repeat testing in a subsequent cycle; persistent missing periods deserve assessment now, rather than waiting for a quarterly check. ASRM: cycle timing and progesterone ↗
- CortisolThere is no validated routine retest interval for measuring training recovery. Agree on the clinical question and repeat at a comparable time of day if advised. MedlinePlus: cortisol testing ↗
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
- MedlinePlus: cortisol testing ↗
- ASRM: cycle timing and progesterone ↗
- Vitamin D: role in bone and muscle health ↗
- MedlinePlus: DHEA-S ↗
- Vitamin D: monitoring treatment response ↗
- Endocrine Society: testosterone assessment ↗
- 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.