Challenge idea · Vitamin D
The vitamin D check-in challenge
Test your vitamin D, track your routine with friends, retest, and compare how things moved.
How it works
- 1
Get your starting Vitamin D
Everyone logs a recent test result before day one. Any result from the 60 days before the start counts.
- 2
Follow your own routine
Each person picks the health practices they want to track. Nobody has to do the same thing.
- 3
Retest and compare
At the end, everyone retests Vitamin D and the group sees how each person’s numbers changed.
Why Vitamin D?
What it is
Vitamin D often changes with season and habits. A shared window turns testing into something you do together.
Getting tested
Vitamin D (25-OH) is a standard blood test, including at-home finger-prick kits.
Your data stays yours
Joining a challenge never changes who can see your health data. You choose what to share.
You can change the name, dates and who can join before it starts. For informational purposes only. Not medical advice.
Ready to test together?
It takes about two minutes to set up and share the link.
Start this challenge with friends