Amino acids (AAs) are defined as organic compounds containing both amino and acid groups (1). Proteinogenic AAs are AAs that serve as substrates for protein synthesis in animal cells, and occur naturally as L-AAs except for glycine.

Antibiotics are antimicrobials that fight bacterial infections such as ear, sinus, and urinary tract infections by stopping the bacteria from multiplying or destroying them.

Anxiety may be defined as apprehension, tension, or uneasiness that stems from the anticipation of danger, which may be internal or external.

Biomarkers, short for biological markers, are biological measurements—they are measurable characteristics of the body.

Bloating is the increased buildup of gas in the intestines and the stomach. Bloating often causes discomfort and pain and the infamous “stuffed” feeling.

Eczema, also known as atopic dermatitis, is a common chronic skin condition that can lead to recurrent infections and poor quality of life if left untreated.

The epigenetic clock concept uses DNA methylation biomarkers to measure age, and helps back the theory that there is evident variation in the chronological rate of aging (years old) vs. an individual’s personalized biological aging process.

The microbiome is a collection of approximately 40 trillion (yes, with a “T”) different organisms living in your gut (you also have microbiomes in other parts of your body, like your mouth and skin).