The claim
Matches the skin's own lipids, heals acne and eczema, and beats 'chemical' moisturizers.
What the evidence says
We found no controlled human trials of tallow as a skin moisturizer. It is an occlusive, saturated fat that will reduce water loss like other heavy emollients, with a higher chance of clogging pores and an unregulated supply chain. Rancidity and contamination are the practical risks with home or small-batch products.
Who should skip it
Acne-prone skin, rosacea, and anyone relying on it to treat eczema instead of proven therapy.
What to do instead, or as well
Petrolatum or a ceramide moisturizer does the occlusive job with trial data and no rancidity problem.
Sources on file
These links support the claims above. Reviewed September 1, 2026.