Most lab panels arrive as a wall of numbers, abbreviations, and “out of range” red flags. After working with a few hundred user-uploaded panels and our medical advisor, here’s how we think about reading one.
The four numbers that matter most
For someone training hard, these are the markers worth paying attention to first:
- Ferritin — your body’s iron stores. Low ferritin slows recovery and tanks endurance long before you’d notice it in the gym. Common in vegetarians, vegans, women, and high-volume endurance athletes.
- Vitamin D — affects mood, sleep, recovery, and bone density. Most people are deficient in winter regardless of latitude. Cheap to fix, easy to test.
- TSH (thyroid) — drives metabolic rate. Subclinical issues here can explain otherwise inexplicable fatigue, weight changes, or recovery problems.
- HbA1c — average blood sugar over the past three months. The earliest meaningful signal of insulin resistance, well before glucose levels look concerning.
There are dozens of other useful markers, but if you’re starting out, these four buy you the most information per dollar.
What “out of range” actually means
Reference ranges are calibrated for the general population. If the range says 12.0–17.5 g/dL for haemoglobin and you come back at 11.9, you’ll get a red flag — but that’s a 0.1 difference from someone “in range”. The ranges have hard edges; your biology doesn’t.
The rule we use: always look at the trend across panels, not a single reading. One reading is a snapshot; two readings is the start of a story.
When to actually talk to a doctor
A single out-of-range value rarely means anything. Two consecutive panels showing the same drift is worth a conversation. If you see a 20%+ change in any marker between panels, talk to your GP — even if both readings are technically “in range”.
A reminder: this is not medical advice. OmniF is a training tool, not a clinical service. We help you see your data clearly; your doctor helps you decide what to do about it.