Potassium alginate

Potassium alginate is notable for FODMAPs and nickel. Clear on lactose, histamine, gluten, fructose, oligosaccharides, sorbitol, sucrose, tyramine, salicylate and oxalates.

Potassium alginate contains only low levels of FODMAPs. Potassium alginate comes from brown seaweed and ferments in the colon - but slowly and evenly, without the fast osmotic pull that makes a FODMAP a FODMAP. Low rather than none, because it does feed the bacteria; low rather than high, because it does it gently and is used in fractions of a percent.

Potassium alginate contains only low levels of nickel. Potassium alginate thickens without adding sodium, which is its whole reason for existing. Its nickel, like every alginate's, comes from the seaweed it was extracted from. Seaweed is the reason this axis is asked about at all here: it concentrates trace elements from seawater, and the review behind this level is about exactly that load in seaweed and in the ingredients made from it. Amounts vary by brand and recipe, so always check the label of the exact product.