Hormones and nutrients

Hormones that set the pace of metabolism, and the vitamins and minerals the rest of it runs on. Slow-moving and easy to overlook — a thyroid or vitamin D result explains patterns that no wearable can.

TSH

Thyroid-stimulating hormone — the pituitary's signal to the thyroid, and the usual first measure of thyroid function.

Cortisol (morning)

A stress and metabolism hormone that follows a daily rhythm, so the time of the draw is part of the result.

Testosterone (total)

Total testosterone. In men it relates to muscle mass, bone and metabolic health; like cortisol it varies through the day.

PTH

Parathyroid hormone — the body's regulator of calcium, read together with vitamin D.

Vitamin D (25-OH)

25-hydroxyvitamin D, the storage form — the standard way to describe vitamin D status.

Vitamin B12

A vitamin needed for red blood cells and nerve function. Read together with folate and homocysteine.

Folate

Vitamin B9. Together with B12 it is part of the pathway that clears homocysteine.

Homocysteine

An amino acid in the blood. Its level depends partly on folate and B12 status, which is why the three are often measured together.

Ferritin

The body's iron store. It also rises with inflammation, so it is not read in isolation.

Magnesium

A mineral involved in muscle and nerve function and in glucose handling. The blood level reflects only a small part of the body's store.

Which measurements you actually have depends on your devices and your lab results. Watches differ: an older model may never record heart-rate variability, while a newer one may not estimate VO₂max until it has recorded outdoor activity. A measurement you do not have is missing from your device, not missing from you.

Educational information — not medical advice or a diagnosis. Discuss your health with a physician.

← What we measure