B-12 Tests | Healthy Ranges

Lead Standard Tests: Blood Serum B-12

Blood Serum B-12:

211 – 911 pg/ml (155 – 670 pmol/L)
180 – 914 pg/ml (132-672 pmol/L)

Ranges for the Lead Standard Blood Serum B-12 Test vary among laboratories. You want a serum B-12 level above 450 pg/ml to keep homocysteine within normal levels. The Japanese actually set the bar at 550 pg/ml. Don’t bother with this test, however. Do the Gold Standard Tests.

The other test that tends to give false positive and false negative scores is the Blood Serum Methylmalonic Acid (MMA) Test. Don’t bother with this test – but if you have scores from the past, here are the numbers:

Healthy Blood Serum MMA:

0.07 – 0.27 µmole/L or 70 – 270 nmol/L

Gold Standard Tests

**(Do the Urinary MMA and the Serum Homocysteine)**

DO THIS ONE: Healthy Urinary MMA:

.58 to 3.56 µg MMA/mg creatinine

AND THIS ONE: Healthy Blood Serum Homocysteine:

2.2 – 13.2 µmole/L

Falsely high values have not been reported for the Urinary MMA Test. This is because the Urinary MMA Test is normalized to urine creatinine, which corrects for dehydration and kidney problems. This is the Gold Standard for screening B-12 levels.

Other Levels You May Want to Know

BREAST MILK LEVELS

According to Gabriel Cousens, M.D. the normal level of B-12 for breast milk is 180 – 300 pg. per ml.

CHILDREN: URINARY MMA LEVELS (Gold Standard)

According to Gabriel Cousens, M.D. the normal urine level for children is 820 – 11,200 micromoles/mmol/cr of MMA.

CHILDREN: SERUM B-12 LEVELS (Lead Standard)

According to Gabriel Cousens, M.D. the normal serum B-12 level of children is 160 – 1300 pg. per ml.

Sources for B-12 Levels Data: Dr. Gabriel Cousens, M.D., “The Mysterious B-12”; Could it Be B-12? 2nd Edition by Pacholok, Sally M., R.N., B.S.N. and Jeffrey J. Stuart, D.O.