St Pierre Croissants primarily use Wheat Flour, Palm Fat/Oil, Water, Sugar, Yeast, and Salt, with variations adding real butter, eggs, milk, or sourdough, but the standard versions often use vegetable fats and include emulsifiers, flavourings, and preservatives like calcium propionate for texture and shelf life, making them suitable for vegans and vegetarians (unless "all butter" is specified). Key ingredients include flour, fats (palm/butter), water, sugar, yeast, emulsifiers, and sometimes pea protein, beta-carotene, or glucose syrup for consistency and colour.