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Background: This study aimed to evaluate the efficacy and safety of oral hydrolyzed collagen peptide (HCP) in healthy females by assessing the skin parameters via biophysical and skin imaging techniques. Methods: 112 females were randomly assigned to receive either HCP (n = 57; 10 g CollaSel Pro®) or placebo (n = 55; 10 g maltodextrin) daily for eight weeks. The contribution of HCP to skin elasticity, hydration, and roughness was investigated against a placebo, while the facial soft tissue sagging (RMS) and safety data were also recorded. Results: HCP was associated with significant improvements in skin elasticity (p = 0.009), skin hydration (p ranged from 0.003 to <0.001), and skin roughness (p ranged from 0.002 to <0.001). In the HCP vs. the placebo group, week eight values for skin elasticity (43.0 (7.4) vs. 40.3 (3.3) mPa, p = 0.017), skin hydration (65.8 (18.9) vs. 53.1 (14.9) g/m3, p < 0.001) and skin roughness (40.2 (20.4) vs. 24.9 (20.9) g/m3, p < 0.001) were significantly higher. In the HCP group, week 8 RMS values were significantly lower than baseline values (1.02 (0.21) vs. 1.10 (0.21) mm, p = 0.012). Conclusions: CollaSel Pro® HCP can be considered a well-tolerated, safe product that effectively improves dermal health and the appearance of sagging and ameliorates the signs of the aging process. [ABSTRACT FROM AUTHOR]

Aim of the Study: The aim of this study was to investigate the role TNF- α , IL-2, and IL-2RB variants in psoriasis (Ps) and to evaluate the association between these variants and clinical features., Material and Methods: A total of 74 psoriatic patients and 74 healthy individuals were genotyped for these variants by PCR and/or RFLP., Results: The AA genotype of TNF- α (-308) was significantly more common in the patients (p = 0.013). TNF- α (-238) AA genotype was significantly increased in the patients (p = 0.028), while the GG genotype was decreased in the patient group, compared to the controls (p = 0.016). IL-2 (-330) variant GG and TT genotype was more common in the patients (p = 0.037, p = 0.009, respectively), while IL-2 (-330) GT genotype was increased in the control subjects (p = 0.001). IL-2 (-330) GG genotype frequency was significantly decreased (p = 0.021) and the TT genotype frequency was significantly increased among patients with psoriatic arthritis in comparison with Ps patients (p = 0.014). IL-2RB TC genotype frequency was significantly decreased and TT genotype frequency was significantly increased in the patients with positive family history of Ps compared to those who had a negative family history (p = 0.017, p = 0.014, respectively). Also, IL-2RB CC genotype was significantly increased among the patients with late-onset Ps in comparison with the early onset Ps group (p = 0.009). The frequency of IL-2 (-330) TT genotype was significantly higher in mild Ps patients than moderate-severe patients (p = 0.043)., Conclusions: Our data suggest a potential role of these genes as candidate genes for susceptibility to Ps in a Turkish cohort., Competing Interests: The authors declare no conflict of interests.