Vitamin B12 ELISA Kit (Folate)

Full Name: Vitamin B12 ELISA Kit (Folate)
Sample Type: Food
Sensitivity: 0.3 ng/ml


Vitamin B12 or B9 (which is also often referred to as folate) are trace elements that belong to a group of vital chelate formers. It is able to form stable complexes that are able to be absorbed through the lower section of the small intestine (along with the intrinsic factor that are present in the gastric juice). The following assay offer a more sensitive and quicker procedure for determining quantitative levels of vitamin B12 present in vitaminated food when compare to other conventional microbiological methods.

Vitamin B12 deficiency is a common nutritional deficiencies in elderly people because repeated gastrointestinal losses of vitamin B9 can deplete the body’s stores. Long term deficiency can cause permanent damage to the nervous system. Mild deficiencies often do not show any discernible symptoms, however, over time these become more significant. Symptoms include: light-headedness, fatigue, rapid breathing, weakness and pale coloured skin. Vitamin B12 deficiency can result in anemia and many other neurological dysfunction.


Vitamin B12 ELISA kit is designed for detecting quantitative concentration of vitamin B12 (folate) in food. This assay has a minimum analytical sensitivity limit of 0.3 ng/ml.


All reagents supplied need to be stored at 2 °C – 8 °C, unopened reagents will retain reactivity until expiration date. Do not use reagents beyond this date.

  • Microtiter Plate: Coated with anti vitamin B12.
  • Vitamin B12 Standards 1-6: Concentration 0, 0.4, 1, 4, 10, 40 ng/ml.
  • Conjugate (Vitamin B12-Peroxidase).
  • Substrate Solution (TMB).
  • Stop Solution (1 N acidic solution).
  • Sample Diluent (PBS).
  • Washing Solution (PBS + Tween 20)(10x Concentrate).
  • Instruction Manual.


The minimum detection sensitivity level of vitamin B12 (folate) using current vitamin B12 ELISA kit was 0.3 ng/ml. The standard range for this assay is 0.4 – 40.0 ng/ml.


– Sensitivity: 0.3ng/ml (based on the standard curve).
– Recovery: 98% based on spiked samples.
– Intra-Assay Precision: 3%
– Cross-Reactivity: Relative to vitamin B12 (=100%): Hydroxycobalamine (29%).


  1. Comparison of five commercially available ELISA kits for the determination of intrinsic factor antibodies in a vitamin B12 deficient adult population. Int J Lab Hematol. (2016) 38 (1): e12-4. Berth M., et al.
  2. Competitive immunoassay for analysis of vitamin B (12). Anal Biochem. (2011) 418 (2): 238-46. Selva Kumar L.S and Thakur M.S.
  3. Iron and vitamin B12-deficiency anaemia in a vegetarian: a diagnostic approach by enzyme-linked immunosorbent assay and radioimmunoassay. Dent Update. (2002) 29 (5): 223-4. Iamaroon A., et al.
  4. Homogeneous enzyme-linkedassay for vitamin B12. Anal Chem. (1987) 59 (6): 837-41. Tsalta C.D. and Meyerhoff M.E.
  5. Relation between erythropoietin and vitamin_B12 in normal and anemic pregnant women. Gynecol Obstet Invest. (1995) 39 (2): 83-7. Carretti N., et al.


Online Enquiry Form

"*" indicates required fields

Please check mark information required:


Your secretory IgA ELISA gave good results and I was also really impressed with how quickly we received it.

L. Johnston
PhD Student / University of Glasgow

It is refreshing to know that you have a technical team that is very knowledgeable. I have already recommended your company to other researchers in our department.

Dr. P. Anderson
Lecturer / University College London (UCL)

I am a first time user and found that your instruction manual was very easy to follow. The insulin ELISA assay performed well and I was happy with the results that were generated.

J. Thomas
Senior Technician / Addenbrooke’s Hospital

I carried out a pilot study comparing the performance of many ELISA assay's from different suppliers and found your kits to be one of the better performers. We observed good linearity and tight replicates.

Dr. C. Davies
Lead Scientists / AstraZeneca

You are my first point of contact when I am looking to purchase ELISA. You have such an easy and simple system, yet it is very effective.

A. Shaw
Purchasing / University of Oxford