Hi lin, Spirulina is a type of blue-green algae found in most lakes and ponds.
Info from the web: Spirulina is considered a complete protein because well over half of it consists of amino acids -- the building blocks of protein. It is also a rich source of other nutrients including B complex vitamins, beta-carotene, vitamin E, carotenoids, manganese, zinc, copper, iron, selenium, and gamma linolenic acid (an essential fatty acid).
Supposed to be very good leh but like not suitable for me.
Ojx, I also have that faint line though my gal is now 16months. Looks like may not go away since now stomach kenna stretched again.