Abstract: Abstract: The thymic peptide thymulin is known for its immunomodulatory role
In addition, background references (where appropriate) included menopause, estrogens, women, skin aging, natural products, phytochemicals, polyphenols, and/or combination(s) thereof (without a year-limit range)
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Certainty of evidence assessment The Grading of Recommendations, Assessment, Development and Evaluation (GRADE) was used to determine the level of certainty of the evidence (Atkins et al