Vitamin B12 Adenosylcobalamin Capsules
Boost mitochondrial energy production with active adenosylcobalamin B12
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90 capsules
90 day supply
per day
Guaranteed additive free
Highest purity
Therapeutically effective
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Have questions about Vitamin B12 Adenosylcobalamin Capsules?
"My MMA levels are high on blood tests. Does that mean I need this form?"
"I have gut absorption issues. Would the capsules still work or do I need the liquid?"
"I take methylcobalamin already. Do I need adenosylcobalamin too?"
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Boost mitochondrial energy production with active adenosylcobalamin B12
Each capsule provides 1000mcg of vitamin B12 as adenosylcobalamin, the mitochondrial form of B12 that is active as a cofactor for the enzyme methylmalonyl CoA mutase. This enzyme is essential for the metabolism of odd chain fatty acids and certain amino acids (valine, isoleucine, methionine, threonine) within the mitochondria for energy production. When adenosylcobalamin is insufficient, methylmalonic acid (MMA) accumulates, which is used clinically as a specific marker of functional B12 deficiency.
Adenosylcobalamin is the less commonly supplemented of the two active B12 forms (the other being methylcobalamin), yet it is equally important. While methylcobalamin supports methylation in the cytoplasm, adenosylcobalamin supports energy production in the mitochondria. Symptoms of adenosylcobalamin deficiency include fatigue, muscle weakness and neurological symptoms, even when methylcobalamin levels are adequate. At 1000mcg per capsule, this provides a beneficial dose for those specifically targeting mitochondrial B12 function. The vegetarian capsule shell makes this suitable for most dietary requirements.
Key benefits:
- Mitochondrial energy production
- Physical endurance and less fatigue
- Active form no conversion needed
| Each capsule contains: | %NRV* | |
|---|---|---|
| Vitamin B12 | 1000 mcg | 40000% |
† Nutrient Reference Value (NRV*) not established
Cellulose, Hydroxypropyl Methylcellulose (capsule), Adenosylcobalamin.
Directions for use:
Take 1 capsule per day with food.
Taking with a meal supports absorption. This product is specifically chosen when mitochondrial energy support is the primary goal, or when MMA levels are elevated on blood tests despite adequate methylcobalamin supplementation.
For comprehensive B12 coverage, this product can be paired with Vitamin B12 Methylcobalamin to provide both active forms simultaneously, or the TRI B12 Liquid can be used instead to provide all three forms (adenosylcobalamin, methylcobalamin and hydroxocobalamin) in a single product.
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Suitable for men.
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Suitable for women.
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Suitable for people under sixteen years of age.
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If pregnant or breastfeeding consult your healthcare professional before purchasing and consuming this product.
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Suitable for vegetarians.
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Suitable for vegans.
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No gluten containing ingredients.
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No nut containing ingredients.
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No dairy containing ingredients.
If you are taking medication consult your prescribing physician before purchasing and consuming supplements.
Store in a cool dry place.
Keep out of reach of children.
Information displayed does not constitute medical advice.
This product should not be used as a substitute for a varied diet.
Once opened, consume within 3 months.
Quality promise
Why clinical grade matters
- ✓ GMP certified, pharmaceutical grade manufacturing
- ✓ Made in UK cleanroom facilities, ISO 9001 & ISO 14001 accredited
- ✓ No fillers, binders or additives — only active ingredients
- ✓ Fully traceable from raw material to finished product
- ✓ Non-GM, non-irradiated, 100% green energy manufacturing
Evidence
What the research shows
Our Health Reference Library is an ever-growing collection of peer-reviewed research and health guidance.
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Frequently asked questions
Why take Vitamin B12 Adenosylcobalamin Capsules?
Vitamin B12 Adenosylcobalamin Capsules supports energy production, nervous system function, and stress resilience.
When should I take B vitamins?
Take in the morning with food to support energy throughout the day.
What are signs of B vitamin deficiency?
Common signs include fatigue, brain fog, mood changes, and numbness.
What does methylated mean?
Methylated B vitamins are pre-activated forms your body can use immediately. Important for those with MTHFR gene variations.
Can B vitamins cause anxiety?
Some people are sensitive to certain B vitamins. Start with a lower dose and take with food if you notice overstimulation.
Why do B vitamins turn urine yellow?
Riboflavin (B2) causes bright yellow urine. This is harmless and shows the vitamins are being processed.
