Not a diagnosis: a head start. These are the three drivers most worth checking first, based on what the evidence says gets missed most often.
Dry skin, brittle nails, thinning brows: textbook underactive thyroid.
Nails and skin are built from what is left over. Low iron or low protein shows here first.
The cheapest visible upgrade for dry, flaky skin in most people.
TSH, ferritin, vitamin D
1. Start a two-minute note in the free journal that asks back, so the pattern becomes visible.
2. Take the test list above to your GP; the GP Script Generator will help you say it clearly.
3. Read the evidence: Browse the library.
Want it tracked and reviewed monthly by a real person? The Club, £10/month.
Education, not diagnosis, and never a replacement for your GP or pharmacist. Reference ranges and guidance vary; sudden, severe or worsening symptoms need 111, or 999 in an emergency. By Hussain Sharifi · independent, affiliate-free health intelligence.