Blood test

High vitamin B9 (folic acid) level in the blood

Blood test
High vitamin B9 (folic acid) level in the blood
Last update: 13/05/2022

What is high vitamin B9 level in the blood called?

  • Vitamin B9 high

What is the normal level of vitamin B9 in the blood?

If you need to know which are the vitamin B9 reference ranges or you require more information about vitamin B9 in a blood test, you can visit normal vitamin B9 in a blood test.

What does a high vitamin B9 level in the blood mean?

Vitamin B9 is also called folic acid or folate. A high vitamin B9 level in the blood is not usually a matter for concern. Since it is a water-soluble vitamin, the excess is excreted in the urine.

High folate levels in the blood may be related to a vitamin B12 deficiency. Body cells need vitamin B12 to use folate.

Vitamin B9 blood values are usually given in ng/ml but sometimes you can see these values in nmol/l following the International System of Units (SI). In case your values are in nmol/l you can convert them using this tool:


A high vitamin B9 level in the blood means:

  • Severe vitamin B9 increase (> 20 ng/ml in adults):

    An increase of Vitamin B9 over the normal range is not common because it is usually excreted through the urine. It may be a sign of pernicious anemia (due to lack of vitamin B12) so it is important to study also vitamin B12 level in the blood. If there is a vitamin B12 deficiency, you should visit your doctor.

Which factors can raise the vitamin B9 level in the blood?

There are some health circumstances than can raise your vitamin B9 (folic acid) level in the blood:

  • Vegetarian diet

Which diseases can raise your vitamin B9 level in the blood?

A vitamin B9 (folic acid) level in the blood higher than normal may be a sign of the following diseases:

  • Blind loop syndrome

What can I do to lower the vitamin B9 level in the blood?

One of the common cause of vitamin B9 increase is a vitamin B12 deficiency. This happens for example in case of pernicious anemia. If this is your case, a visit to your doctor is recommended and he may prescribe you vitamin B12 supplements.

Green leafy vegetables (spinach, cabbage, broccoli, lettuce) are foods with a high folate content, so a vegetarian diet with a high intake of these products and a low intake of meat (which provides vitamin B12) may increase vitamin B9 level in the blood.

Where can I find more information about vitamin B9 in a blood test?

You can visit our pages about:

Which values are considered a high vitamin B9 in a blood test?

The following values are considered to be above the normal range:

IMPORTANT: These levels are expressed in ng/ml. They are an example of a healthy adult of about 45 years old with no known disease and not taking any medication. The ranges can be different depending on the laboratory or on your personal circumstances.

Vitamin B9 (Folic Acid)
Severe increase
20.1 ng/ml20.2 ng/ml20.3 ng/ml20.4 ng/ml20.5 ng/ml20.6 ng/ml20.7 ng/ml20.8 ng/ml
20.9 ng/ml21 ng/ml21.1 ng/ml21.2 ng/ml21.3 ng/ml21.4 ng/ml21.5 ng/ml21.6 ng/ml
21.7 ng/ml21.8 ng/ml21.9 ng/ml22 ng/ml22.1 ng/ml22.2 ng/ml22.3 ng/ml22.4 ng/ml
22.5 ng/ml22.6 ng/ml22.7 ng/ml22.8 ng/ml22.9 ng/ml23 ng/ml23.1 ng/ml23.2 ng/ml
23.3 ng/ml23.4 ng/ml23.5 ng/ml23.6 ng/ml23.7 ng/ml23.8 ng/ml23.9 ng/ml24 ng/ml
24.1 ng/ml24.2 ng/ml24.3 ng/ml24.4 ng/ml24.5 ng/ml24.6 ng/ml24.7 ng/ml24.8 ng/ml
24.9 ng/ml25 ng/ml25.1 ng/ml25.2 ng/ml25.3 ng/ml25.4 ng/ml25.5 ng/ml25.6 ng/ml
25.7 ng/ml25.8 ng/ml25.9 ng/ml26 ng/ml26.1 ng/ml26.2 ng/ml26.3 ng/ml26.4 ng/ml
26.5 ng/ml26.6 ng/ml26.7 ng/ml26.8 ng/ml26.9 ng/ml27 ng/ml27.1 ng/ml27.2 ng/ml
27.3 ng/ml27.4 ng/ml27.5 ng/ml27.6 ng/ml27.7 ng/ml27.8 ng/ml27.9 ng/ml28 ng/ml
28.1 ng/ml28.2 ng/ml28.3 ng/ml28.4 ng/ml28.5 ng/ml28.6 ng/ml28.7 ng/ml28.8 ng/ml
28.9 ng/ml29 ng/ml29.1 ng/ml29.2 ng/ml29.3 ng/ml29.4 ng/ml29.5 ng/ml29.6 ng/ml
29.7 ng/ml29.8 ng/ml29.9 ng/ml30 ng/ml30.1 ng/ml30.2 ng/ml30.3 ng/ml30.4 ng/ml
30.5 ng/ml30.6 ng/ml30.7 ng/ml30.8 ng/ml30.9 ng/ml31 ng/ml31.1 ng/ml31.2 ng/ml
31.3 ng/ml31.4 ng/ml31.5 ng/ml31.6 ng/ml31.7 ng/ml31.8 ng/ml31.9 ng/ml32 ng/ml
32.1 ng/ml32.2 ng/ml32.3 ng/ml32.4 ng/ml32.5 ng/ml32.6 ng/ml32.7 ng/ml32.8 ng/ml
32.9 ng/ml33 ng/ml33.1 ng/ml33.2 ng/ml33.3 ng/ml33.4 ng/ml33.5 ng/ml33.6 ng/ml
33.7 ng/ml33.8 ng/ml33.9 ng/ml34 ng/ml34.1 ng/ml34.2 ng/ml34.3 ng/ml34.4 ng/ml
34.5 ng/ml34.6 ng/ml34.7 ng/ml34.8 ng/ml34.9 ng/ml35 ng/ml35.1 ng/ml35.2 ng/ml
35.3 ng/ml35.4 ng/ml35.5 ng/ml35.6 ng/ml35.7 ng/ml35.8 ng/ml35.9 ng/ml36 ng/ml
36.1 ng/ml36.2 ng/ml36.3 ng/ml36.4 ng/ml36.5 ng/ml36.6 ng/ml36.7 ng/ml36.8 ng/ml
36.9 ng/ml37 ng/ml37.1 ng/ml37.2 ng/ml37.3 ng/ml37.4 ng/ml37.5 ng/ml37.6 ng/ml
37.7 ng/ml37.8 ng/ml37.9 ng/ml38 ng/ml38.1 ng/ml38.2 ng/ml38.3 ng/ml38.4 ng/ml
38.5 ng/ml38.6 ng/ml38.7 ng/ml38.8 ng/ml38.9 ng/ml39 ng/ml39.1 ng/ml39.2 ng/ml
39.3 ng/ml39.4 ng/ml39.5 ng/ml39.6 ng/ml39.7 ng/ml39.8 ng/ml39.9 ng/ml40 ng/ml
40.1 ng/ml40.2 ng/ml40.3 ng/ml40.4 ng/ml40.5 ng/ml40.6 ng/ml40.7 ng/ml40.8 ng/ml
40.9 ng/ml41 ng/ml41.1 ng/ml41.2 ng/ml41.3 ng/ml41.4 ng/ml41.5 ng/ml41.6 ng/ml
41.7 ng/ml41.8 ng/ml41.9 ng/ml42 ng/ml42.1 ng/ml42.2 ng/ml42.3 ng/ml42.4 ng/ml
42.5 ng/ml42.6 ng/ml42.7 ng/ml42.8 ng/ml42.9 ng/ml43 ng/ml43.1 ng/ml43.2 ng/ml
43.3 ng/ml43.4 ng/ml43.5 ng/ml43.6 ng/ml43.7 ng/ml43.8 ng/ml43.9 ng/ml44 ng/ml
44.1 ng/ml44.2 ng/ml44.3 ng/ml44.4 ng/ml44.5 ng/ml44.6 ng/ml44.7 ng/ml44.8 ng/ml
44.9 ng/ml45 ng/ml45.1 ng/ml45.2 ng/ml45.3 ng/ml45.4 ng/ml45.5 ng/ml45.6 ng/ml
45.7 ng/ml45.8 ng/ml45.9 ng/ml46 ng/ml46.1 ng/ml46.2 ng/ml46.3 ng/ml46.4 ng/ml
46.5 ng/ml46.6 ng/ml46.7 ng/ml46.8 ng/ml46.9 ng/ml47 ng/ml47.1 ng/ml47.2 ng/ml
47.3 ng/ml47.4 ng/ml47.5 ng/ml47.6 ng/ml47.7 ng/ml47.8 ng/ml47.9 ng/ml48 ng/ml
48.1 ng/ml48.2 ng/ml48.3 ng/ml48.4 ng/ml48.5 ng/ml48.6 ng/ml48.7 ng/ml48.8 ng/ml
48.9 ng/ml49 ng/ml49.1 ng/ml49.2 ng/ml49.3 ng/ml49.4 ng/ml49.5 ng/ml49.6 ng/ml
49.7 ng/ml49.8 ng/ml49.9 ng/ml50 ng/ml50.1 ng/ml50.2 ng/ml50.3 ng/ml50.4 ng/ml
50.5 ng/ml50.6 ng/ml50.7 ng/ml50.8 ng/ml50.9 ng/ml51 ng/ml51.1 ng/ml51.2 ng/ml
51.3 ng/ml51.4 ng/ml51.5 ng/ml51.6 ng/ml51.7 ng/ml51.8 ng/ml51.9 ng/ml52 ng/ml
52.1 ng/ml52.2 ng/ml52.3 ng/ml52.4 ng/ml52.5 ng/ml52.6 ng/ml52.7 ng/ml52.8 ng/ml
52.9 ng/ml53 ng/ml53.1 ng/ml53.2 ng/ml53.3 ng/ml53.4 ng/ml53.5 ng/ml53.6 ng/ml
53.7 ng/ml53.8 ng/ml53.9 ng/ml54 ng/ml54.1 ng/ml54.2 ng/ml54.3 ng/ml54.4 ng/ml
54.5 ng/ml54.6 ng/ml54.7 ng/ml54.8 ng/ml54.9 ng/ml55 ng/ml55.1 ng/ml55.2 ng/ml
55.3 ng/ml55.4 ng/ml55.5 ng/ml55.6 ng/ml55.7 ng/ml55.8 ng/ml55.9 ng/ml56 ng/ml
56.1 ng/ml56.2 ng/ml56.3 ng/ml56.4 ng/ml56.5 ng/ml56.6 ng/ml56.7 ng/ml56.8 ng/ml
56.9 ng/ml57 ng/ml57.1 ng/ml57.2 ng/ml57.3 ng/ml57.4 ng/ml57.5 ng/ml57.6 ng/ml
57.7 ng/ml57.8 ng/ml57.9 ng/ml58 ng/ml58.1 ng/ml58.2 ng/ml58.3 ng/ml58.4 ng/ml
58.5 ng/ml58.6 ng/ml58.7 ng/ml58.8 ng/ml58.9 ng/ml59 ng/ml59.1 ng/ml59.2 ng/ml
59.3 ng/ml59.4 ng/ml59.5 ng/ml59.6 ng/ml59.7 ng/ml59.8 ng/ml59.9 ng/ml60 ng/ml
60.1 ng/ml60.2 ng/ml60.3 ng/ml60.4 ng/ml60.5 ng/ml60.6 ng/ml60.7 ng/ml60.8 ng/ml
60.9 ng/ml61 ng/ml61.1 ng/ml61.2 ng/ml61.3 ng/ml61.4 ng/ml61.5 ng/ml61.6 ng/ml
61.7 ng/ml61.8 ng/ml61.9 ng/ml62 ng/ml62.1 ng/ml62.2 ng/ml62.3 ng/ml62.4 ng/ml
62.5 ng/ml62.6 ng/ml62.7 ng/ml62.8 ng/ml62.9 ng/ml63 ng/ml63.1 ng/ml63.2 ng/ml
63.3 ng/ml63.4 ng/ml63.5 ng/ml63.6 ng/ml63.7 ng/ml63.8 ng/ml63.9 ng/ml64 ng/ml
64.1 ng/ml64.2 ng/ml64.3 ng/ml64.4 ng/ml64.5 ng/ml64.6 ng/ml64.7 ng/ml64.8 ng/ml
64.9 ng/ml65 ng/ml65.1 ng/ml65.2 ng/ml65.3 ng/ml65.4 ng/ml65.5 ng/ml65.6 ng/ml
65.7 ng/ml65.8 ng/ml65.9 ng/ml66 ng/ml66.1 ng/ml66.2 ng/ml66.3 ng/ml66.4 ng/ml
66.5 ng/ml66.6 ng/ml66.7 ng/ml66.8 ng/ml66.9 ng/ml67 ng/ml67.1 ng/ml67.2 ng/ml
67.3 ng/ml67.4 ng/ml67.5 ng/ml67.6 ng/ml67.7 ng/ml67.8 ng/ml67.9 ng/ml68 ng/ml
68.1 ng/ml68.2 ng/ml68.3 ng/ml68.4 ng/ml68.5 ng/ml68.6 ng/ml68.7 ng/ml68.8 ng/ml
68.9 ng/ml69 ng/ml69.1 ng/ml69.2 ng/ml69.3 ng/ml69.4 ng/ml69.5 ng/ml69.6 ng/ml
69.7 ng/ml69.8 ng/ml69.9 ng/ml70 ng/ml70.1 ng/ml70.2 ng/ml70.3 ng/ml70.4 ng/ml
70.5 ng/ml70.6 ng/ml70.7 ng/ml70.8 ng/ml70.9 ng/ml71 ng/ml71.1 ng/ml71.2 ng/ml
71.3 ng/ml71.4 ng/ml71.5 ng/ml71.6 ng/ml71.7 ng/ml71.8 ng/ml71.9 ng/ml72 ng/ml
72.1 ng/ml72.2 ng/ml72.3 ng/ml72.4 ng/ml72.5 ng/ml72.6 ng/ml72.7 ng/ml72.8 ng/ml
72.9 ng/ml73 ng/ml73.1 ng/ml73.2 ng/ml73.3 ng/ml73.4 ng/ml73.5 ng/ml73.6 ng/ml
73.7 ng/ml73.8 ng/ml73.9 ng/ml74 ng/ml74.1 ng/ml74.2 ng/ml74.3 ng/ml74.4 ng/ml
Medically reviewed by our Medical staff on 13/05/2022


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