Powders containing a buffer salt and an amino acid, reconstitution of such a powder into a nutritional product, and methods of using such a nutritional product

A method of:

• i) treating, reducing incidence of, or reducing severity of at least one condition selected from the group consisting of metabolic syndrome, age-related decline in metabolic regulation, and muscle indications in an individual in need thereof or at risk thereof, or
• ii) delaying off-set of metabolic decline, maintaining muscle mass, decreasing oxidative stress, maintaining immune function and/or maintaining cognitive function in a healthy older adult, or
• iii) enhancing metabolizing of reactive oxygen species, improving glucose control and/or improving muscle function in an individual having at least one of obesity, pre-diabetes or diabetes, or
• iv) improving mitochondrial function in an individual having sarcopenia, or
• v) improving at least one of muscle performance or muscle recovery from exercise,
• vi) treating, reducing an incidence of, reducing a severity of, and/or preventing overweight and/or obesity,
• vii) treating, reducing an incidence of, reducing a severity of, and/or preventing skin aging,
• viii) promoting healthy skin and/or treating, reducing an incidence of, reducing a severity of, and/or preventing a skin condition or a skin disease, the method comprising:
• orally administering to the individual an effective amount of a nutritional product comprising at least one glycine or functional derivative thereof, at least one N-acetylcysteine, L-cysteine or functional derivative thereof, a buffer salt, and an ingredient selected from the group consisting of a protein, an acidic component, and a mixture thereof,
• wherein the nutritional product has been produced before the administering by a process comprising reconstituting a powder into a liquid comprising the ingredient, the powder comprising the at least one glycine or functional derivative thereof, the at least one N-acetylcysteine, L-cysteine or functional derivative thereof, and the buffer salt.