The Growing Interest in Peptides: What You Should Know

Peptides are short chains of amino acids that serve as the building blocks of proteins. Acting as biological messengers, peptides bind to cell receptors to signal cells to perform specific functions, such as repairing tissues, supporting digestion, helping the body use energy from food, regulating metabolism and regulating hormone activity.

Different peptides have different amino acid sequences, allowing them to perform a wide range of functions in the body. Depending on the type of peptide, they may help stimulate collagen production, influence growth hormone release or assist in regulating blood sugar levels. The body's natural production of certain peptides declines with age. As a result, peptide supplements, particularly collagen peptides, have become increasingly popular for supporting skin health, joint function, tissue repair and muscle recovery.

Collagen is the most abundant protein in the body and forms the primary structural component of the skin, bones, muscles, tendons, ligaments and other connective tissues. It provides these tissues with strength, flexibility and structural support. As we age, the body's natural collagen production declines while the rate of collagen breakdown increases. This gradual loss of collagen contributes to visible signs of ageing, such as wrinkles and reduced skin elasticity, and may also lead to weaker bones, joints and connective tissues over time.

Topical peptides are widely used in skincare to help stimulate collagen production, which may improve skin elasticity and reduce the appearance of fine lines and wrinkles.

Hair serums containing peptides, such as GHK-Cu (glycyl-L-histidyl-L-lysine copper), may help support hair growth and improve hair density in some people experiencing hair loss.

Peptides are also available as dietary supplements, with collagen peptides being among the most common. Some protein powders contain hydrolysed proteins, which have been broken down into smaller peptide chains for easier digestion and absorption. In addition to supplements, peptides occur naturally in many protein-rich foods, including meat, fish, eggs, dairy products, beans, lentils, soy, oats, flaxseed and wheat. These foods provide amino acids and naturally occurring peptides that support a wide range of functions throughout the body.