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July 2020 in “Experimental Dermatology” Topical L-thyroxine may help with wound healing and hair growth but should be used short-term due to potential risks.
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May 1996 in “American journal of physiology. Regulatory, integrative and comparative physiology/American journal of physiology. Regulatory, integrative, and comparative physiology” Gray seals use more energy and have higher hormone levels during their annual fur-shedding period.