A common type of algae can actually fix Vitamin B12 deficiency, proving you don't just need meat for it.
March 19, 2026
Original Paper
Assessing the efficacy of Chlorella vulgaris for Vitamin B12 Deficiency: A Randomized Controlled Trial
medRxiv · 10.64898/2026.03.16.26348496
The Takeaway
In a 12-week trial, tablets made from Chlorella vulgaris quadrupled the vitamin B12 levels of deficient adults. This suggests that certain algae provide a bioavailable 'active' form of the vitamin, offering a genuine plant-based solution for a nutrient previously thought to be exclusive to animal products.
From the abstract
Abstract: Context: Vitamin B12 deficiency is common among vegans and vegetarians due to limited intake of animal-derived foods. Identifying safe, plant-based sources of vitamin B12 is essential to address this nutritional gap. Aims: This study evaluated the efficacy and safety of Chlorella vulgaris tablets in improving vitamin B12 deficiency. Settings and Design: A double-blind, randomized, placebo-controlled trial was conducted among 46 healthy adults with vitamin B12 deficiency (serum levels 1