I am not an expert, nor do I know their efficacy, nor do I know if there are
side effects, but I have read that algaes are good for preventing sun burn,
and healing skin burns. There's a topical cream called Phycotene Cream made
from spirulina that supposedly works. But, I just read it in Conscious Eating
by Gabriel Cousens, so I have no idea if any of this is true.