Some dermatologists advise against tallow due to concerns about potential comedogenicity (pore-clogging) and the lack of large-scale scientific studies proving specific benefits. Additionally, consistency and quality can vary significantly between tallow sources, making it difficult to recommend universally.

Tallow can be comedogenic for some individuals, potentially leading to breakouts, especially for those with oily or acne-prone skin. Its animal origin may also be a concern for those with sensitivities or ethical objections to animal products.

The rise of readily available and often cheaper alternatives like petroleum-based products and plant-derived oils led to a decline in tallow use. Modern cosmetic formulations also offered specific ingredients targeting various skin concerns, overshadowing tallow's traditional applications.

While tallow contains fatty acids that can moisturize and potentially improve skin elasticity, there's no scientific evidence it definitively eliminates wrinkles. Consistent hydration and protection from sun damage are key factors in minimizing the appearance of wrinkles.