Ingestion of bioactive collagen hydrolysates enhance facial skin moisture and elasticity and reduce facial ageing signs in a randomised double-blind placebo-controlled clinical study

Oral collagen-derived dipeptides, prolyl-hydroxyproline and hydroxyprolyl-glycine, ameliorate skin barrier dysfunction and alter gene expression profiles in the skin

(2015) Jun Shimizu et al.   BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS

Oral Intake of Specific Bioactive Collagen Peptides Reduces Skin Wrinkles and Increases Dermal Matrix Synthesis

(2014) E. Proksch et al.   SKIN PHARMACOLOGY AND PHYSIOLOGY

Distribution of Prolylhydroxyproline and Its Metabolites after Oral Administration in Rats

(2012) Tomoaki Kawaguchi et al.   BIOLOGICAL & PHARMACEUTICAL BULLETIN

Oral administration of collagen tripeptide improves dryness and pruritus in the acetone-induced dry skin model

(2012) Tomoko Okawa et al.   JOURNAL OF DERMATOLOGICAL SCIENCE

Identification of a novel food-derived collagen peptide, hydroxyprolyl-glycine, in human peripheral blood by pre-column derivatisation with phenyl isothiocyanate

(2011) Yasutaka Shigemura et al.   FOOD CHEMISTRY

Quantification of hydroxyprolyl-glycine (Hyp-Gly) in human blood after ingestion of collagen hydrolysate

(2011) Fumihito Sugihara et al.   JOURNAL OF BIOSCIENCE AND BIOENGINEERING

Collagen Hydrolysate Intake Increases Skin Collagen Expression and Suppresses Matrix Metalloproteinase 2 Activity

(2011) Vivian Zague et al.   JOURNAL OF MEDICINAL FOOD

HA modulation of epidermal morphogenesis in an organotypic keratinocyte-fibroblast co-culture model

(2010) Hua Gu et al.   EXPERIMENTAL DERMATOLOGY

Collagen-derived dipeptide, proline-hydroxyproline, stimulates cell proliferation and hyaluronic acid synthesis in cultured human dermal fibroblasts

(2010) Hiroki OHARA et al.   JOURNAL OF DERMATOLOGY

The Protective Effects of Long-Term Oral Administration of Marine Collagen Hydrolysate from Chum Salmon on Collagen Matrix Homeostasis in the Chronological Aged Skin of Sprague-Dawley Male Rats

(2010) Jiang Liang et al.   JOURNAL OF FOOD SCIENCE

Absorption of Hydroxyproline-Containing Peptides in Vascularly Perfused Rat Small Intestinein Situ

(2009) Chinfang LIU et al.   BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY

Hydroxyproline-containing dipeptides and tripeptides quantified at high concentration in human blood after oral administration of gelatin hydrolysate

(2009) Satomi Ichikawa et al.   INTERNATIONAL JOURNAL OF FOOD SCIENCES AND NUTRITION

Effect of Prolyl-hydroxyproline (Pro-Hyp), a Food-Derived Collagen Peptide in Human Blood, on Growth of Fibroblasts from Mouse Skin

(2009) Yasutaka Shigemura et al.   JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

Native hyaluronic acid in dermatology – results of an expert meeting

(2008) Luitgard Wiest et al.   JOURNAL DER DEUTSCHEN DERMATOLOGISCHEN GESELLSCHAFT