In contrast, the TEWL of the placebo group in the face remained consistent, while the forearm showed an increasing trend, as depicted in Figure 4C,D , respectively.
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The evidence from in vitro primary fibroblasts and a randomized, double-blind, placebo-controlled clinical trial of tuna collagen peptides intake on skin health.
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Nevertheless, the observed difference between the groups did not reach statistical significance. 22 When considering the relative mean change (%) in the TEWL from baseline, the TCP group displayed a trend in reducing TEWL by −2.5% and −10.4% in the face and by −2.7% and −5.8% in the forearm at 4 and 8 weeks, respectively.
The TCP group showed a trend of increasing the relative mean change (%) in skin hydration from baseline by 12.2% and 30.6% in 4 and 8 weeks, respectively.