New Era Comb C contains magnesium phosphate, sodium phosphate, sodium sulphate and silica. Nat phos is the ingredient most closely associated with acidity in the tissue salt range, mag phos is often chosen for cramping and griping discomfort, nat sulph is traditionally linked with liver and digestive balance, and silica is included as a broader tissue support mineral.
Put together, those ingredients make Comb C a digestive blend rather than a single-purpose antacid. It is usually chosen when heartburn sits alongside bloating, indigestion or upper stomach discomfort. Biotin is the added nutrient in the formula and contributes to normal energy metabolism and the maintenance of normal mucous membranes.
Nat phos is the main ingredient most buyers look for here, but the supporting salts matter as well. Mag phos can be useful when discomfort comes with tightness or spasms, and nat sulph is often included when digestion is sluggish or heavy after rich food.