What was measured
Brittle nail severity
One ingredient has been read against brittle nail severity in this library.
This page is not a ranking. Ingredients are listed by name, in alphabetical order.
Still to read against brittle nail severity
Every ingredient on our to-read list for brittle nail severity — one of them — has been read against it.
Of the 58 ingredients in this library, one has been read against brittle nail severity, from two sources.
An ingredient that is not named above is not a gap: nobody set out to read it against brittle nail severity, and this library holds no record of having looked and found nothing.
The one ingredient read against brittle nail severity
The numbers behind these lines are not on one scale. Not one of the two findings here records the unit it was measured in. Each source read a different group of people, over a different stretch of time, in the units it chose.
- Biotin (vitamin B7) and brittle nail severityTwo sources, all measured lower
Read next
The other 4 things measured under Skin, hair and nails
All 136 things measured in this library
This is a library, not advice. No recommendation, no dose, no diagnosis, no ranking. We never ask about your symptoms, and nothing here is tailored to you.