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Adeno B12

60 Lozenges

Key Benefits and Actions*

  • May help support the normal conversion of homocysteine to methionine
  • May help support healthy metabolism
  • May help support cognitive health
  • May help support healthy energy levels

Ships Monday, March 25 if ordered in the next 1 day, 14 hours and 46 minutes!

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Availability: In stock

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Suitable for Vegans and Vegetarians

Free of:

Dairy, Egg, Fish, Shellfish, Tree Nuts, Peanuts, Wheat, Soy, Gluten, GMO

Adeno B12 Lozenges by Seeking Health provide 3,000 mcg of adenosylcobalamin, the mitochondrial form of vitamin B12, in an easy-to-deliver lozenge. Adenosylcobalamin is considered an active “coenzyme” form of B12, meaning it is used directly in B12-dependent enzyme reactions in the body. This form provides an alternative to methylcobalamin for individuals who may be sensitive to methyl donors or methylated B vitamins.*

Vitamin B12 is required for proper red blood cell formation, neurological function, and DNA synthesis. Vitamin B12 functions as a cofactor for methionine synthase and L-methylmalonyl-CoA mutase. Methionine synthase catalyzes the conversion of homocysteine to methionine. Methionine is required for the formation of SAMe (S-adenosylmethionine), an important methyl donor.*

Vitamin B12 is naturally present in seafood, shellfish, liver, eggs and dairy products. It may be harder for vegetarians and vegans to meet their daily needs for vitamin B12 from food sources without relying on supplements or fortified foods.*

If you are looking for a similar product with methylfolate, consider our Active B12 with L-5-MTHF. For a similar product combined with methylcobalamin, another coenzyme form of B12, consider our Active B12 5000. For vitamin B12 in the form of hydroxocobalamin, consider our Hydroxo B12.

Suggested Use

Take 1 lozenge daily or as directed by your healthcare professional. Lozenge may be broken into smaller pieces if lower dosage is desired.


Children and pregnant or lactating women should consult their healthcare practitioner prior to use. Do not use if tamper seal is damaged. Consult with a healthcare professional before use if you are using antibiotics or other medications.

Serving Size: 1 lozenge
Servings Per Container: 60

Supplement Facts

Vitamin B12 (as adenosylcobalamin) 3000 mcg 125000%
% DV (Daily Value) based on standard 2,000 calorie daily intake
**Daily Value not established

Other Ingredients: Xylitol, ascorbyl palmitate, silica, natural cherry flavor.

Additional Info
Additional Info
Learning Center Find product FAQ and more! Click here.
Cost Per Serving $0.30
Delivery Method Lozenge
Tablet Size 11/32"
Storage Keep closed in a cool, dry place out of reach by children.
Age Suitability Adult
Manufactured In USA
Case Quantity 24
Dimensions (in.) Length: 1.875 / Width: 1.875 / Height: 3.25
Weight (lb.) 0.0500
Barcode 700580723589
Return Policy 30 Day Returns ― Learn more about our Return Policy.
Customer Reviews (50)
The best
This is hands down the best B12 I have ever tried. Much more cost effective and convenient that the injections. Review by Valerie (Posted on 5/26/2017)
Adeno B 12 = Energy
Having the MTHFR as well as COMT and MAO gene mutations, and having suffered with chronic fatigue for years, I found Adeno B12 of great benefit for my energy levels. Review by Estelle (Posted on 5/25/2017)
I love this product. It was difficult to find Adeno B12. I'm happy to have found it now. This supplement is very pure and does noy contain magnesium stereate. Review by Michelle (Posted on 11/19/2015)
Great Addition
This is a great addition in the arsenal for treating those with B12 deficiencies and elevated serum B12. I also take it myself. It's been a very consistent product. Review by Tamitha (Posted on 11/1/2015)
Great B12
Quick to dissolve, easy taste, my favorite way to get B12 Review by Michele (Posted on 10/4/2015)
improves mitochondrial function and energy i
Great for those including myself who do not break down B12 into the mitochondrial form. In these cases the increase in energy and wellbeing is definitely noticeable. Review by Karen (Posted on 6/12/2015)
Best b12 ever!
This is the best b12 I have ever used, so glad to have found one without artificial sweeteners or stearates. Great if you can't tolerate the methyl form. Review by Jen (Posted on 2/20/2015)
perfect for certain polymorphisms
It is great to have this product for those clients who don't methylate B12 but who also don't absorb it even if methylated.
it seems to work very well
Review by the blossom clinic (Posted on 2/14/2015)
A Quality Product
For me, this was a hard to find product and it is a good quality one. Being a methylation conscious person, I wanted both "active" forms of B12.
I am very pleased with this product and will continue to use it. I do take several supplements so it is hard for me to judge the overall effectiveness and purity, so on the safe side I gave them a score of 4 out of 5.
I am looking forward in ordering more of your products!
Thank you!
Review by Sharyl (Posted on 10/28/2014)
Best B12 EVER!
This is the best B12 product I have ever used. I have been searching for a sublinual that does not contain mannitol or sorbitol so was thrilled when this product was released. I also love that I don't get the same jitterness with the adenosyl form that I do with methyl B12. I swear I can feel the B12 actually getting into my body whereas with other products I've used I just don't feel well but rather just get the negative side effects. I'm definitely hooked! Review by Cera (Posted on 12/21/2013)

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*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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