Cyanocobalamin vs methylcobalamin is mostly a question of form, not of whether you are getting "real" vitamin B12. Both are vitamin B12. Cyanocobalamin is the stable, well-studied form used in most supplements and fortified foods, and your body converts it into the two active forms it uses. Methylcobalamin is one of those active forms, taken directly. For most healthy people, the evidence does not show that one is absorbed better than the other. Energy+™ uses cyanocobalamin, and below we explain what that means and why we chose it.
Key takeaways
- Both are vitamin B12; only the small group attached to the cobalt differs.
- Cyanocobalamin is converted in the body into the two active forms your cells use.
- Per the NIH, current evidence shows no clear absorption difference between B12 forms.
- Energy+ gives 2,000 mcg of B12 (as cyanocobalamin) per two-capsule serving, inside a full B-complex.
Cyanocobalamin vs methylcobalamin: what is the actual difference?
Cyanocobalamin and methylcobalamin are both vitamin B12; they differ in the small group attached to the cobalt at the center of the molecule. Every form of B12 shares the same large ring structure around that cobalt. In cyanocobalamin it is a cyano group. In methylcobalamin it is a methyl group. In adenosylcobalamin, the other active form, it is an adenosyl group. A fourth form, hydroxocobalamin, is common in injections.
Inside the body, those attached groups are swapped. Your body converts cyanocobalamin into methylcobalamin and adenosylcobalamin, the two forms your cells actually use. It removes the cyano group and builds the active forms from the remaining B12 core. Methylcobalamin works in the cell's main fluid, where it helps recycle homocysteine into methionine. Adenosylcobalamin works inside mitochondria, where it helps the body use certain fats and amino acids for energy. Both jobs matter, and the body needs both active forms.
The four forms at a glance
| Form | Where you see it | Good to know |
|---|---|---|
| Cyanocobalamin | Most supplements and fortified cereals | Very stable; the most studied form; converted by the body |
| Methylcobalamin | Some supplements and lozenges | One of the two active forms; more sensitive to light |
| Adenosylcobalamin | A few specialty supplements | The other active form, used inside mitochondria |
| Hydroxocobalamin | Mostly injections given by clinicians | The form naturally found in many foods |
Is methylcobalamin better absorbed than cyanocobalamin?
This is the claim you will see most often online, and it is worth slowing down on. The NIH Office of Dietary Supplements says existing evidence does not suggest differences among B12 forms in absorption or bioavailability. Some smaller studies suggest the forms may be handled a little differently after absorption, for example in how much is kept in tissues versus passed in urine, and a 2017 review by Paul and Brady walks through those differences in detail. But "handled differently" is not the same as "works better," and good head-to-head data in healthy people is limited.
What matters more than the form, for most people, is the amount. B12 from food and supplements is absorbed through a protein called intrinsic factor, and that route fills up quickly. A small share of a larger dose is also absorbed by passive diffusion. According to the NIH, only about 10 mcg of a 500 mcg oral supplement is absorbed in healthy people. That is why many B12 supplements, whatever their form, list amounts well above the daily recommendation.
What about the "cyanide" in cyanocobalamin?
The word sounds alarming, so it is a fair question. The cyano group in cyanocobalamin is a single carbon-nitrogen unit bound to the vitamin. When the body converts it, the amount released is extremely small, far smaller than the amounts that occur naturally in everyday foods such as almonds, flaxseed and lima beans, which the body routinely clears. Cyanocobalamin has been used in supplements and fortified foods for decades, and it remains the reference form in much of the B12 research.
If you simply prefer methylcobalamin, that is a reasonable personal choice. It is not evidence that cyanocobalamin is unsafe or ineffective.
Why does Energy+ use cyanocobalamin?
We chose cyanocobalamin for three practical reasons. It is stable, which helps the amount on the label hold up through storage. It is the most researched form, so the dose sits on solid ground. And it plays well inside a multi-ingredient formula, which matters because Energy+ is a full B-complex, not a single vitamin.
Energy+ provides 2,000 mcg of vitamin B12 as cyanocobalamin in each two-capsule serving, alongside a full B-complex. The B12 sits next to the rest of the B family, because these vitamins work as a team in turning food into usable cellular energy and in supporting nerve tissue health.*
- Folate, 1,190 mcg DFE (700 mcg folic acid)
- Vitamin B6, 30 mg
- Thiamin (B1), 100 mg, and riboflavin (B2), 100 mg
- Niacin, 20 mg NE, and pantothenic acid, 100 mg
- Biotin, 1,000 mcg (biotin can interfere with some lab tests, so tell your doctor and lab before blood work), plus vitamin C, choline and inositol
The label directs two capsules once daily with food and an 8 fl oz glass of water, which makes one bottle a 30-day supply. Energy+ is caffeine-free, so it supports energy metabolism rather than acting as a stimulant, and many people prefer to take it earlier in the day.* Every active is listed by amount on the label, with no proprietary blend.
Why pair B12 with folate and B6?
B12, folate and B6 share a pathway. Folate hands off a methyl group that B12 (as methylcobalamin) uses to recycle homocysteine, and B6 helps with a neighboring step. Because the three are linked, a B-complex covers the whole chain rather than one link of it. There is a second reason too: large amounts of folic acid can hide signs of low B12 status, which is why it is sensible to take folic acid together with B12 rather than on its own. If you want more on the folate side of the label, our guide to folate vs. folic acid covers it.
How to choose a B12 supplement (whatever the form)
- Check the form is named. A good label tells you which cobalamin you are buying.
- Check the amount per serving. Look for the serving size, and how many capsules make one serving.
- Look for testing. Third-party testing for purity and potency tells you the label matches the capsule. Every batch of Energy+ is third-party tested and made in an NSF-certified, GMP-certified, FDA-registered U.S. facility; see our standards.
- Match the formula to your goal. A single-nutrient B12 and a B-complex are different tools. If your aim is steady, caffeine-free energy support, the whole B family is the more complete choice.*
Frequently asked questions about cyanocobalamin vs methylcobalamin
Is cyanocobalamin a synthetic form of B12?
Yes. Cyanocobalamin is made for supplements and fortified foods because it is stable. Your body converts it into the same active forms, methylcobalamin and adenosylcobalamin, that it makes from B12 in food.
Does methylcobalamin work faster?
There is no good evidence that it does in healthy people. The NIH Office of Dietary Supplements says existing evidence does not show differences among forms in absorption or bioavailability. How much you take and how consistently you take it matter more.
Can I take a B-complex if I already eat B12-rich foods?
Many people do. Water-soluble B vitamins you do not use are passed in urine, which is also why a B-complex can turn urine bright yellow. If you take medication or have a medical condition, check with your healthcare provider before adding any supplement.
Is Energy+ vegan?
Yes. Energy+ comes in vegetable capsules and is listed as vegan, vegetarian, gluten-free and non-GMO. Cyanocobalamin is not made from animal sources.
What is the best time to take a B12 supplement?
Follow the label first. For Energy+ that is two capsules once daily with food and a glass of water. Because B vitamins support energy metabolism, many people prefer the morning or early afternoon.
Related reading from our Wellness Hub
Sources
- NIH Office of Dietary Supplements: Vitamin B12 fact sheet for health professionals
- NIH Office of Dietary Supplements: Folate fact sheet for health professionals
- Paul C, Brady DM. Comparative bioavailability and utilization of particular forms of B12 supplements. Integrative Medicine, 2017
Individual results vary.
*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.
