
Magnesium
Magnesium is required by thiamine pyrophosphokinase to convert thiamine into active TPP.
Disclosure: We are an independent comparison platform. We may earn an affiliate commission when you purchase through links on our site at no extra cost to you. As an Amazon Associate, we earn from qualifying purchases. Read the full disclosure.

Seeking Health · USA
Supplements › Vitamins › Vitamin B12 › Adenosylcobalamin › Adeno B12 3,000 mcg 60 Lozenges
Lozenges · · Hydroxocobalamin & Adenosylcobalamin · 3 mg elemental per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 19 Sept 2026, 15:31 UTC. Prices and availability are subject to change.

Magnesium is required by thiamine pyrophosphokinase to convert thiamine into active TPP.

Vitamins B2 and B3 support adjacent energy pathways and help prevent metabolic bottlenecks.
Timing note: Take away from tea, coffee, and concentrated polyphenol extracts, whose tannins can reduce thiamine stability.
Nutrient pairings are based on clinical absorption data. Statements regarding dietary supplements have not been evaluated by the FDA or EFSA and are not intended to diagnose, treat, cure, or prevent any disease. Always consult your physician before starting any supplementation protocol.
What it is
Contributes to normal red blood cell formation, the normal function of the nervous system and the reduction of tiredness and fatigue.
Who it suits
General wellness support
Best price today
$22.12 at iHerb ()
| Merchant | Base price | Shipping | Delivery | Stock | |
|---|---|---|---|---|---|
| iHerb | $22.12 | Free | In stock | View on iHerb |
Prices last synced: 19 Sept 2026, 15:31 UTC. Prices and availability are subject to change.
Disclosure: We are an independent comparison platform. We may earn an affiliate commission when you purchase through links on our site at no extra cost to you. As an Amazon Associate, we earn from qualifying purchases. Buttons take you to the named retailer's own site to complete your purchase.
Gross compound
3 mg
Elemental active
3 mg
% Daily value
0%
Bioavailability
High
Target benefits
GI tolerance & side effects
Renal & other contraindications
Upper tolerable intake:
Same category, different carrier economics.

NOW Foods
B-12
—
$12.57· $0.21 cost per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

NOW Foods
B-12 2,000 mcg
—
$12.57· $0.13 cost per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

NOW Foods
B-12 Liposomal Spray 2 fl oz
Hydroxocobalamin & Adenosylcobalamin
$15.88
Approximate conversion — the retailer charges in EUR.
Prices last synced: 19 Sept 2026, 15:31 UTC. Prices and availability are subject to change.

KAL
B-12 Methylcobalamin & Adenosylcobalamin Mixed Berry 2,000 mcg 60 Micro Tablets
—
$13.83
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

NOW Foods
B-12,100 Lozenges
—
$8.01· $0.08 cost per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

NOW Foods
B-12,250 Lozenges
—
$17.59· $0.07 cost per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

Life Extension
BioActive Folate & Vitamin B12
—
$9.16
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

California Gold Nutrition
Complete B Complex with L-Methylfolate and Methylcobalamin B12,180 Veggie Capsules
—
$39.03· $0.43 cost per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

Doctor's Best
Fully Active B12 1,500 mcg
—
$7.43· $0.04 cost per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

California Gold Nutrition
Gummiology® B Complex Gummies with Vitamins B6 and B12 Folate and Biotin Strawberry 45 Vegetarian Gummies
—
$9.08· $0.20 cost per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

California Gold Nutrition
High Potency Vitamin B Complex with Methyl Folate & Methyl B12
—
$10.10· $0.11 cost per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

Seeking Health
Hydroxo B12 With Folinic Acid
—
$25.39· $0.42 cost per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

Seeking Health
Hydroxo-Adeno B12 2,000 mcg 60 Lozenges
Hydroxocobalamin & Adenosylcobalamin
$16.93
Approximate conversion — the retailer charges in EUR.
Prices last synced: 19 Sept 2026, 15:31 UTC. Prices and availability are subject to change.

Triquetra Health
L-Methylfolate 5-MTHF Plus Methyl B12 Berry 1 fl oz
—
$27.30
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.

California Gold Nutrition
Liquid Multi-Vitamin & Mineral with Calcium Vitamin B12 Vitamins C & D3 for Children No Alcohol Natural Orange Mango 8 fl oz (237 ml)
—
$18.40· $0.77 cost per serving
Approximate conversion — the retailer charges in EUR.
Prices last synced: 3 Oct 2026, 18:04 UTC. Prices and availability are subject to change.