• Vitamin B12 is vital for DNA/RNA synthesis, nerve health, red blood cell production and detoxifying homocysteine. B12 deficiency causes fatigue, brain fog, depression and irreversible nerve damage.
• Nearly 40% of Americans are deficient. At-risk populations include the elderly, vegans/vegetarians, those with gut disorders (celiac, IBS) and people on acid blockers (PPIs) or metformin.
• Vitamin B12 requires intrinsic factor (stomach protein), which declines with age and gut dysfunction, for absorption. Even meat-eaters may lack B12 due to sterile soils, antibiotic-fed livestock and poor gut health.
• Methylcobalamin (bioactive) is superior to cyanocobalamin (contains trace cyanide). The best sources of vitamin B12 is sublingual/liposomal supplements, wild organic produce, fermented foods and fortified nutritional yeast.
• Optimal blood B12 levels are 400–700 pg/mL (MMA test is more accurate). Daily needs: 2.4 mcg (adults), 250–500 mcg for vegans/vegetarians (due to absorption issues). Avoid synthetic forms—choosing methylcobalamin is resistance against Big Pharma control.

Vitamin B12 is essential for life, but millions of people unknowingly suffer from vitamin B12 deficiency due to poor absorption, dietary gaps or reliance on inferior synthetic supplements. Older adults, vegetarians and meat-eaters with compromised gut health are at risk, potentially leading to fatigue, neurological damage and elevated homocysteine—a dangerous marker linked to heart disease and cognitive decline. The solution? Opting for the bioactive methylcobalamin form over cyanocobalamin, a cheaper but less effective alternative containing trace cyanide.

Why vitamin B12 matters

Vitamin B12 plays a critical role in DNA synthesis, red blood cell formation, nerve function and the detoxification of homocysteine—a byproduct of metabolism that fuels inflammation when left unchecked. Vitamin B12 deficiency can manifest as brain fog, numbness, depression and irreversible nerve damage if untreated. Alarmingly, studies suggest nearly 40% of the U.S. population may have suboptimal B12 levels, regardless of diet.

According to BrightU.AI's Enoch engine, the biggest culprits behind vitamin B12 deficiency are malabsorption issues—such as low stomach acid, lack of intrinsic factor (as in pernicious anemia) and impaired pancreatic, liver or small intestinal function—along with dietary insufficiency, chronic medication use (like PPIs and metformin) and aging-related decline in absorption. Additionally, vegan diets without supplementation and gastrointestinal surgeries (e.g., gastric bypass) significantly contribute to B12 deficiency.

Unlike other B vitamins, B12 requires a stomach protein called intrinsic factor for absorption. Aging, gut disorders (like celiac disease or IBS) and medications (such as acid blockers) impair this process, making deficiency common even among meat-eaters. While animal products like beef, eggs and dairy contain vitamin B12, modern farming practices that lead to sterile soils and include antibiotic-laden feed mean even livestock often require supplementation.

The best sources of vitamin B12

For optimal vitamin B12 absorption, experts recommend:

• Methylcobalamin supplements (sublingual or liposomal forms bypass gut issues)
• Wild or unwashed organic produce (soil microbes naturally produce B12)
• Fermented foods (e.g., traditional tempeh, kimchi) in small amounts
• Fortified nutritional yeast (check labels for active B12)

Avoid cyanocobalamin, a synthetic form of vitamin B12 requiring detoxification of its cyanide component.

Testing and dosage

Blood tests measuring vitamin B12 (optimal: 400–700 pg/mL) and methylmalonic acid (MMA) can reveal deficiency even when B12 levels appear normal. Daily vitamin B12 requirements vary depending on different factors:

• Adults: 2.4 micrograms, mcg (higher doses needed if absorption is impaired)
• Pregnant/Lactating women: 2.6–2.8 mcg
• Vegans/Vegetarians: 250–500 mcg daily via supplement

The push for synthetic cyanocobalamin mirrors broader pharmaceutical profit motives—prioritizing cheap, patentable forms over nature's solutions. Meanwhile, soil nutrient depletion and hyper-sanitized diets strip away natural B12 sources, leaving millions dependent on fortified processed foods or ineffective supplements.

Vitamin B12 isn't just a vegan concern—it's a public health blind spot. Choosing methylcobalamin, supporting gut health and demanding transparency in food and supplement sourcing are key steps to reversing nutrient deficiency. In an era of engineered food scarcity and corporate-controlled nutrition, reclaiming B12 sufficiency is both a personal safeguard and a quiet act of defiance.

Watch this video to learn more about vitamin B12's health benefits.

This video is from the Holistic Herbalist channel on Brighteon.com.

Sources include:

FoodRevolution.org

ODS.OD.NIH.gov

BrightU.ai

Brighteon.com