Expand your health knowledge
Guides, research, and insights on biomarkers, longevity, and taking control of your health history.
Editor's picks
A hard workout before a blood test can throw off 5 results
Hard exercise in the days before a blood draw can move CK, AST, ALT, the kidney estimate and the white cell count. What England and Spain say about it.
How to cut a supplement stack from 111 pills to 30
Nine steps that turn a shelf of bottles into one dated page a clinician can work from, with what England and Spain each publish about the review.
How to build muscle and strength at any age
The 2026 ACSM position stand and the UK Chief Medical Officers agree on one minimum: all major muscle groups, twice a week. Here is what the rest changes.
11 health essentials for a long life
The eleven habits behind a long life, which ones the American Heart Association scores, and who invites you to a check-up in England and in Spain.
7 things to write down before every doctor's appointment
Longetic keeps visits and reports in one timeline. Seven things to write down before a doctor's appointment, with what NHS and Spanish guidance say.
10 habits that fix terrible sleep
Ten sleep habits the sleep medicine literature actually tests, what England and Spain tell you to do next, and the four things worth logging.
Executive health checkups sell doctor time, not test data
Executive physicals cost $1,700 to $10,000 in a JAMA survey. A large blood panel costs $189 to $399. What the extra money buys, and what the guidelines say.
Plan type, not state, decides if preventive care is free
Longetic holds the record of what you have already had done, not who pays for it. In a US plan, three things decide whether preventive care is free.
Use your health insurance before 31 December
Longetic keeps the record of what you have had done this year. Each country's rules decide which deductibles, caps and deadlines reset on 1 January.
Keep what your doctor told you, not just the summary
The after-visit summary is not your medical record and not a term US federal rules define. What it misses, what you are owed, and what to keep.
8 blood markers show what intermittent fasting changes, and most move less than you think
Longetic holds the lab panels you take before and after a fasting period, from any laboratory, so the baseline and the repeat sit side by side. Recent trials show smaller changes than most fasting articles promise: no difference in HbA1c across 99 trials, no LDL change without calorie restriction, and modest drops in insulin and CRP. Here is what each marker showed, how to keep two panels comparable, and which apps cover which part.
Why unit conversion matters in health care
Longetic keeps every lab value in the unit and with the reference range your laboratory printed, because the unit is part of the result. A glucose of 126 mg/dL is 7.0 mmol/L, a dose of 0.025 mg is 25 mcg, and two results in the same unit can still describe different things. This is where units change a number, a diet or a dose, and where no conversion is safe.
When several doctors prescribe for you, keeping one medication list is the job nobody owns
Longetic keeps your medication list in the same searchable timeline as your lab reports, diagnoses and doctor visits, so one record covers every prescriber. Reminder apps tell you to take a dose. Neither job covers the other, and if you see a cardiologist, an endocrinologist and a general practitioner, you need both halves.
Biological age tests measure three different things, and none of them is your age
Longetic stores whatever a longevity test sends you and charts the ordinary markers alongside it, and it does not calculate a biological age of its own. The tests sold under that name were trained to predict three different targets: your chronological age, your risk of dying, and your rate of change. Knowing which one you bought explains most of the confusion.
The preventive checks people with a chronic condition miss are usually their own
Longetic keeps every lab report, diagnosis, medication and doctor visit in one searchable history, so the date of your last kidney check is a search away rather than a guess. If you live with diabetes, chronic kidney disease or heart disease, the checks that slip are rarely the famous ones. They are the annual urine test, the dilated eye exam, the foot check and the vaccinations your condition adds to the standard adult schedule.
What a sleep specialist actually does, and what to ask at your first appointment
Longetic keeps the visit note, the recommendations and the prescriptions from a sleep appointment in one searchable timeline, and nudges you so nothing slips between visits. A sleep specialist is a doctor who trained in another specialty first and then subspecialised in sleep medicine. Here is what they will ask you, the ten questions to ask them back, and what the April 2026 guideline changed.
What a standard annual physical includes depends on which country you are in
There is no international standard for an annual physical. The US has no recommendation for one, England checks every 5 years, Germany every 3, Spain none.
7 sections belong in a doctor-ready summary
Longetic and six other apps produce a doctor-ready summary, but almost none of them tell you what is supposed to be inside one. The international standard names 14 sections, 3 of them mandatory and 4 recommended. Here is what each one has to say, what a second opinion adds on top, and how the finished summary actually reaches the person reading it.
You can now upload lab results to Longetic from your computer
Longetic now takes lab reports and doctor visit documents straight from a computer. Sign in at app.longetic.com in any browser, drag in the whole folder, and every file is read, sorted and filed on its own.
6 apps keep your medication list and lab results in one place in 2026
Longetic keeps lab reports, medications and doctor visits in one searchable timeline, and this guide is the check on whether anything else does. Fourteen apps against their own published pages, ten medications against the lab tests they move, and the hours and weeks that decide whether a result is readable.