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Researchers have found that allantoin has potent healing and soothing properties. A 2010 study, for example, found that the topical application of a gel containing allantoin and two other compounds twice a day for 24 weeks helped improve skin lesions and scarring.

An animal study published in 2010 also found that topical application of allantoin helped encourage wound healing and hastened the reestablishment of normal skin. An earlier study published in 2009 found that comfrey extract had marked wound-healing activity.

Comfrey’s high content of allantoin is really it’s claim to fame, as the compound is believed to be able to encourage the proliferation of skin cells, strengthening skin tissues and helping to heal wounds as well as reducing the visible effects of aging. By bringing back skin’s elasticity, it helps to fade wrinkles. It minimizes scars, as well, accelerates tissue healing from any sort of skin damage, and prevents infection. Many find it to be effective in reducing acne breakouts.

In addition to its regenerating allantoin, comfrey also has a powerful anti-inflammatory activity that makes it great for wounded or problematic skin. This is also why it proved helpful for bruising, broken bones, and swelling, as it combats the inflammation associated with these injuries. Creams of comfrey are popular among athletes for sprains, swollen areas, and even joint pain.

A mild astringent property makes comfrey cream a good solution for sunburn, ulcers, and sores. Combined with its anti-inflammatory and skin regenerating properties, the astringent activity also makes comfrey a helpful treatment for eczema, dermatitis, psoriasis, and viral skin infections.