An Algal Answer?

A vitamin B12 lack results in muscle weakness; numbness; nausea; weight loss; fatigue and increased heart rate. A chronic deficiency can increase the risk of developing anaemia; heart disease and/or diabetes. People on vegetarian or vegan diets currently have to use B12 supplements, as plants don't make this compound. Vegetarians/vegans may now be able to avoid a B12 deficiency, by adding certain algae ('seaweeds') to their diets (https://www.theguardian.com/lifeandstyle/2023/jul/15/scientists-find-vital-missing-ingredient-for-healthy-vegan-diet-algae). Research at Cambridge University found that some algal species take up and concentrate ('bioaccumulate') B12 from surrounding bacteria. These algae could be used to supplement the diets of plant-eating humans. This is, surprisingly similar to how meat eaters get their B12. This vitamin is also produced by gut bacteria in herbivores, like cows and sheep. The traditional sources of dietary B12 are consequently meat; dairy products and eggs. The algae would be a helpful additional, plant-based source of the vitamin, acceptable to all people on a vegetarian/vegan diet. Everyone should remember, however, to thank the bacteria for their largesse!