21st Century B-12 5000 mcg Sublingual Tablets, 110 Tablets

Key Benefits of Vitamin B12

Discover 21St Century B-12 — Vitamin B12, or cobalamin, is essential for normal energy-yielding metabolism – it helps your body convert food into usable energy. It also contributes to normal red blood cell formation, normal homocysteine metabolism, and the proper functioning of the nervous system. These are all authorised health claims recognized by the European Food Safety Authority (EFSA). Many people find that supplementing with B12 helps combat fatigue and supports mental clarity and concentration.

Who Should Take a Vitamin B12 Supplement?

While adults need only about 2.4 mcg daily, certain groups are more prone to deficiency. Older adults often produce less stomach acid, which reduces absorption from food. Vegans and vegetarians may lack B12 because it’s naturally found only in animal products such as meat, eggs, and dairy. Those with digestive conditions like Crohn’s disease, or those taking medications such as metformin or proton pump inhibitors, may also benefit. If you suspect low B12 – symptoms include tiredness, weakness, memory issues, and tingling in hands or feet – consider supplementing and consult your GP.

What Is Vitamin B12 and Why Do You Need It?

Vitamin B12 is a water-soluble vitamin that plays a critical role in DNA synthesis, red blood cell production, and nerve health. Without enough B12, your body cannot produce healthy red blood cells, leading to anaemia. It also supports brain function, including memory and concentration. Because B12 is stored in the liver, a deficiency can take years to develop, but once symptoms appear, they may affect your overall wellbeing.

How to Choose the Best B12 Supplement

When selecting a B12 supplement, consider the form and delivery method. This product contains cyanocobalamin, a stable, cost-effective form that your body easily converts into active coenzymes. The sublingual tablet dissolves under the tongue, allowing B12 to absorb directly into the bloodstream – especially helpful if you have absorption difficulties. The 5000 mcg dosage is considered high potency, ideal for quickly correcting deficiencies or maintaining optimal levels. Always choose a reputable brand that follows Good Manufacturing Practice (GMP).

Recommended Dosage and How to Take B12

For general maintenance, one 5000 mcg sublingual tablet per week is often sufficient, but many people take one daily for maximum benefit. Place the tablet under your tongue and allow it to dissolve completely (usually 30–60 seconds). Do not swallow it whole. For best results, take on an empty stomach. If you have specific health concerns, consult your health care professional to determine the right dose for you.

Frequently Asked Questions

Can you take too much B12? Vitamin B12 is water-soluble, so excess is excreted in urine, making it safe even at high doses. However, always follow recommended dosages and seek professional advice if you have concerns.
Is cyanocobalamin as effective as methylcobalamin? Yes, cyanocobalamin is a precursor that your body converts into active forms. It is well-studied, widely used, and offers the same benefits for most people.

Product Features

• High-potency 5000 mcg vitamin B12 (cyanocobalamin)
• Sublingual tablets for fast absorption
• Supports normal energy-yielding metabolism and red blood cell formation
• Ideal for vegetarians, vegans, and those with absorption concerns
• 110 tablets per bottle

Usage Instructions

Place one tablet under the tongue until dissolved. Uses as directed by a health care professional. Store in a cool, dry place. Keep out of reach of children.

This product is a food supplement. It is not intended to diagnose, treat, , or prevent any disease. The health claims are supported by the European Food Safety Authority.