Most of the edible blue-green algae (cyanobacteria) used for human supplements predominantly contain pseudovitamin B(12), which is inactive in humans. https://www.ncbi.nlm.nih.gov/pubmed/17959839
Be aware that the values are a bit low compared to the optimal intake, which is 250mcg (daily) or 2500mcg (weekly) for B12 and 50mcg (daily) Vitamin D.
I wanna buy a B12 supplement for some nerve repair, you guys are smashing those right? Is there a well-known better option?
Sounds like a combo of methylcobalamin and adenosylcobalamin versions is best:
https://www.ncbi.nlm.nih.gov/pubmed/25117994
Most of the edible blue-green algae (cyanobacteria) used for human supplements predominantly contain pseudovitamin B(12), which is inactive in humans.
https://www.ncbi.nlm.nih.gov/pubmed/17959839
There's tonnes of brands out there though.