@article {2551, title = {Hydrolyzed Collagen Tonic Drink Prevents Worsening of Skin Parameters and Improves Photoaging Classification in Healthy Thai Women: A Randomized Controlled Trial}, journal = {Pharmacognosy Journal}, volume = {17}, year = {2025}, month = {September 2025}, pages = {644-652}, type = {Original Article}, chapter = {644}, abstract = {

Background: Skin aging represents a significant public health burden globally, with Southeast Asian populations experiencing accelerated photoaging due to intensive environmental ultraviolet exposure. Aim: To evaluate the preventive efficacy of hydrolyzed collagen tonic drink on skin aging parameters in healthy Thai women. Methods: A double-blind, randomized controlled trial was conducted with 135 Thai women aged 40-60 years. Participants were randomized to receive either hydrolyzed fish collagen peptides with supportive nutrients (n=67) or active fruit juice control (n=68) daily for 12 weeks. Primary outcomes included skin microtopography parameters measured by Visioscan, skin elasticity assessed by Cutometer, and clinical photoaging classification using Glogau scale. Secondary outcomes examined molecular biomarker changes in procollagen Type I synthesis. Results: The collagen group demonstrated significantly attenuated skin surface deterioration compared to placebo. The Wrinkles parameter showed significant betweengroup differences at week 8 (-100.43 units, p=0.001). Smoothness parameter exhibited protective effects with significant between-group differences at week 8 (-80.08 units, p=0.002). Gross elasticity improved significantly within the collagen group at week 12 (p=0.033). Procollagen Type I synthesis demonstrated superior maintenance in the collagen group versus placebo (between-group percent change difference, p=0.002). Both groups achieved comparable Glogau classification improvements (23.9\% versus 20.6\%). Conclusion: Daily hydrolyzed collagen supplementation with supportive nutrients effectively prevented skin surface parameter deterioration in Thai women, demonstrating meaningful preservation of skin integrity through medium effect sizes for key parameters. These findings support nutritional approaches as complementary strategies for photoaging management in high ultraviolet-exposure populations

}, keywords = {Dermal aging, Hydrolyzed collagen, photoaging, Skin elasticity, Wrinkle}, doi = {10.5530/pj.2025.17.81}, author = {Uratchat Vichaidit and Chuntida Kamalashiran and Kammal Kumar Pawa and Pratya Phetkate} } @article {2542, title = {The Photoprotective Effect of Cucurbita moschata Seed Extract on Rat Skin Exposed to Ultraviolet Radiation}, journal = {Pharmacognosy Journal}, volume = {17}, year = {2025}, month = {September 2025}, pages = {588-596}, type = {Original Article}, chapter = {588}, abstract = {

Photoaging induced by ultraviolet B (UVB) radiation is characterized by DNA damage, oxidative stress, extracellular matrix degradation, and collagen loss. This study evaluated the photoprotective effects of topical pumpkin seed (Cucurbita moschata) extract cream against UVB-induced skin damage in Wistar rats. CPD (cyclobutane pyrimidine dimer), MDA (malondialdehyde), MMP-1 (matrix metalloproteinase-1) levels, and collagen density were assessed. UVB exposure significantly increased CPD, MDA, and MMP- 1 levels while reducing collagen density. Treatment with pumpkin seed extract cream, particularly at 10\% concentration, markedly reduced CPD and MDA levels (P <= 0.05), indicating potent DNA repair support and antioxidant activity likely attributable to phenolic and flavonoid compounds. MMP-1 levels were significantly decreased, approaching normal values, suggesting inhibition of collagen degradation through anti-inflammatory and anti-matrix degradation mechanisms. Histological examination revealed higher collagen density and more organized collagen fibers in treated groups compared with negative control and placebo. These findings indicate that Cucurbita moschata seed extract cream exerts strong photoprotective, antioxidant, anti-inflammatory, and collagen-preserving effects, with the 10\% formulation showing the greatest efficacy.

}, keywords = {collagen density, CPD, Cucurbita moschata, photoaging, UVB radiation}, doi = {10.5530/pj.2025.17.73}, author = {Dewi Sartika and Gusbakti Rusip and Linda Chiuman and Ermy Girsang} }