Lard is a popular soapmaking ingredient. It was also used in the last century and before that by many women as a natural, cheap moisturizer. It refers to rendered pig fat.
Therefore, being an animal product, is avoided by vegans and animal rights activists. It has a bad enough reputation in general, especially as a cooking ingredient.
While there are definitely vegetable options for all your beauty products, lard still makes sense for two reasons: for some, it's a cheap available ingredient; for some, it's the only product that is able to soothe the effects of life-lasting skin conditions like psoriasis or eczema.
Still not convinced to make this moisturizer at home, but you liked the idea? Check out some natural beauty products made with lard you can purchase:
Lard Cream With Herbs (Etsy) tidd.ly/384NkRQ
Luxury Night Cream with Lard and Duck Fat (Etsy) tidd.ly/3D5cHRS