The roots of Panax ginseng, known as Korean ginseng, have been widely used worldwide for treating many diseases and general health maintenance. Korean ginseng is perceived as safe owing to its natural origin, extensive historical uses, and accumulated scientific clinical studies in humans. According to oriental medicine theory, Panax ginseng is categorized as having warm properties, while Panax quinquefolium, called American ginseng, is classified as having cool properties. Based on this, it is said that Panax ginseng might cause an elevation of body temperature, such as sensations of warmth or heat, whereas Panax quinquefolium provides cooling effects. However, scientific evidence for comparing these parallel thermogenic effects of two species is scarce. This focused review summarizes clinical trials and animal studies regarding the heat responses of two Panax species. This review aims to provide an overview of current scientific data on the thermogenic effects inducing a heat sensation and a hot feeling of Korean ginseng and American ginseng.

Vanillin (4-hydroxy-3-methoxybenzaldehyde) is widely recognized for its aromatic flavor and established pharmacological properties, including antioxidant, antimicrobial, anti-inflammatory, and anticancer effects. While these biological activities underpin its therapeutic potential, recent advances have expanded the application of vanillin into the field of biomaterials. In particular, vanillin’s unique chemical structure enables its use as a multifunctional building block for the development of innovative hydrogels with dynamic covalent bonding, injectability, and self-healing capabilities. Vanillin-based hydrogels have demonstrated promising applications in wound healing, drug delivery, tissue engineering, and antimicrobial platforms, combining structural support with intrinsic bioactivity. These hydrogels benefit from vanillin’s biocompatibility and functional versatility, enhancing mechanical properties and therapeutic efficacy. This review provides an overview of vanillin’s pharmacological effects, with a primary focus on the synthesis, properties, and biomedical applications of vanillin-derived hydrogels. By highlighting recent material innovations and their translational potential, we aim to position vanillin as a valuable natural compound bridging bioactivity and biomaterial science for future clinical and therapeutic advancements.