Every panel, trended against your last one

Every marker, flagged and trended

Log a full panel (total and free testosterone, estradiol, hematocrit, hemoglobin, the lipid panel, liver enzymes, thyroid markers, glucose, HbA1c and more) and each value is stored with its unit and a flag against a reference range: low, normal, high or critical, with separate male and female ranges where they differ.

Each marker gets its own trend chart, so you can see it move across four panels instead of trying to remember last quarter's number. Upload the lab report PDF too and it sits beside the values you entered.

What a marker means next to what you logged

A marker outside its range shows on your dashboard with its flag and a comparison to your previous reading. For a set of nutrition-related markers (iron status, vitamin D, B12, folate, magnesium, and the diet-sensitive parts of the lipid panel) the flag sits next to your logged intake of the matching nutrient, so a low ferritin reading and three months of under-target iron intake appear on one screen.

The app describes that pairing as "coincided with", not "caused". It does not diagnose a deficiency or present a supplement as the fix for a lab value. A critical marker points you to a clinician and is not paired with an intake suggestion. If you have logged too little of the matching nutrient to say anything, the page says so.

You can ask your meal plan to favor a nutrient ("help me raise my iron"), and the planner leans toward foods rich in it within your macro targets. You give that instruction yourself; a lab result does not set it.

A biological age score, computed from markers you already logged

Once you have logged the markers it needs, MuscleBuddy can compute a biological age estimate with PhenoAge, a published formula built from routine bloodwork. It is arithmetic over your own readings, trended like any other marker, so you can watch it move as your panels change.

PhenoAge comes from aging research. Applied to one person it is an estimate with wide error, not a verdict on your health, and the app shows it as a number and a trend.

Fed by, and feeding, the rest of your data

Bloodwork sits in Health beside your recovery score, vitals and supplement stack. Its closest link is to Nutrition: iron status, vitamin D, B12, folate, magnesium and the diet-sensitive lipid markers sit next to your logged intake of the matching nutrient. A marker does not change your program, but a flagged marker alongside a stall in your logged sets gives you and your coach context. Genetics lives in Upkeep. If you use it, the app pairs a stored genotype with four markers (vitamin D, ferritin, transferrin saturation and tTG-IgA) and shows a genetic association only beside your own measured values. Upkeep's medication log can also explain a marker's movement, such as a liver enzyme shifting the month a new prescription started.

None of this changes your training program or nutrition targets by itself. What to do about a flagged marker is a conversation with your doctor.

Yours, and your coach’s if you choose

Bloodwork is health data under MuscleBuddy's privacy rules: it is not posted to a feed, not shown on a leaderboard, and not included in any export except your own. If you work with a coach on MuscleBuddy, you decide whether they can see your readings and flags, through a scope you grant and can revoke. When the relationship ends, their access ends and your history stays with you.