Collagen provides the building blocksspecifically the amino acids glycine, proline, and hydroxyprolinethat your body uses to rebuild muscle tissue and strengthen your skin and joints while you sleep
Smith, MD, the Institute of Dermatology, London, UK
First, the observational nature of this study prevents us from establishing definitive causal relationships, and unmeasured confounders such as lifestyle factors, psychological conditions, or socioeconomic status could have influenced the results
Availability of data and materials The datasets used and/or analyzed during the current study are available from the corresponding authors on reasonable request
Smoking is one of the greatest threats to public health