Vitamin B12 180 pg/mL — what does it mean?

What this test is

Your level of vitamin B12, a nutrient your cells rely on to copy their DNA.

What your number means

Aim for 400 or higher. Anything between 200 and 400 gets printed as ‘normal’ on most lab reports but is a genuine shortfall for cells trying to divide — this is one of the most commonly missed results there is. Under 300 is worth acting on now.

Why it matters

Every time a cell divides it has to copy its DNA, and B12 is a key tool for that job — run low and division stalls.

When a cell splits in two, it first photocopies its entire instruction manual (its DNA), and B12 is part of the copier. Without enough, the copy jams — so cells come out large, unfinished and faulty.

What to do about it

B12 comes almost entirely from animal foods, so vegetarians often run low. A supplement or fortified foods usually fixes it. If yours stays low despite supplementing, ask your doctor about absorption.

Where it sits in your Body Age

Vitamin B12 is one of the tests behind Metabolic Fuel — Whether you have the vitamins and minerals your body needs on hand to repair itself. It is one of four areas that together give a single number: the age your body reads, next to the age on your birth certificate.