What does my nail say about my health?

[Slinkycat22]

I was feeling wiped out last summer, so requested a B12 blood test as I've had low levels in the past. The results showed I have a b12 deficiency (123ng/l), my ferritin was also low (13ug/l) & my folate was 7.8ng/l. I was prescribed iron tablets for 3mths & B12 injections for life.
My bloods were re-checked 3 months later & I requested a Vitamin D test as I wasn't feeling any better, my vit D result was 35. Dr suggested I take Vit D supplements too. My B12 & Ferritin levels had risen considerably.
However I still feel awful.
I've booked an appointnent with my dr next week to didcuss next steps. I know our nails can reveal alot about our health. Mine have always been strong & long, but they're awful at the moment. I've attached a photo of my thumb nail, does anyone have any thoughts about what I should ask the Dr to investigate?

Maybe calcium and thyroid

I'd get your thyroid checked, abnormalities in that can cause ridges in nails

You don't mention your diet. Is it good?

Depends on how old you are.

Thanks for your replies. I'm 49. I've been a vegetarian for most of my life, but I eat a healthy & varied diet and watch what I eat. I workout several times a week although i'm still a couple of lbs overweight.

Do you have any psoriasis? I have those longitudinal ridges and have psoriatic arthritis. I'm not sure are yours also raised at the sides? If they are, that's another symptom.