Step 01 · Before the labs

About you

We use this to apply the right research context to your labs.

Demographics

Fields marked are required.

Your age

We use age to apply the correct reference ranges — postmenopausal, perimenopausal, and younger women have different research thresholds for some iron markers.

Are you on gender-affirming hormone therapy?

This tool's corpus is built on research about women's iron health. If you're on gender-affirming hormone therapy, tell us which kind so we can route you correctly.

Yes, testosterone-based Yes, estrogen-based No

Life stage

Which of these describes you right now?

We apply different research thresholds for each life stage. Pregnancy thresholds are trimester-specific. Postpartum thresholds shift over the first six months. Perimenopausal and postmenopausal thresholds are higher than premenopausal thresholds.

Cycling — regular or irregular periods Pregnant Within 6 months of giving birth Perimenopausal — changing or skipped cycles Postmenopausal — no period for 12+ months None of these apply

Dietary context

How do you eat most of the time?

I eat meat, poultry, or fish regularly I eat mostly plants, with limited or no animal products

Iron absorption differs meaningfully between animal-based and plant-based iron sources, and the research on plant-forward iron status has some distinct patterns.

Recent illness

Have you been sick in the last 2 weeks?

Colds, flu, infection, surgery, or a flare of a chronic condition all count. Inflammation raises ferritin in your blood — if you've been sick recently, your ferritin may read higher than your true iron stores.

Yes No

Iron supplementation

Are you taking iron supplements now, or have you in the last 2 weeks?

Oral iron raises ferritin measurably within a couple of weeks. If you're currently or were recently supplementing, we flag your ferritin as possibly elevated. The research read gets a recalibration flag instead of full confidence.

Yes, currently Yes, stopped in the last 2 weeks No

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