Sarcopenia
Protein intake and physical activity are important stimuli for muscle protein synthesis. A number of expert groups have proposed an increase in dietary protein recommendations for older age groups to 1.0-1.2 g/kg body weight per day.
Key nutrient supplementation in older adults is of interest in the prevention of sarcopenia and frailty, since it is a simple, low-cost treatment approach without major side effects.
Puppy nutrition
Growing puppies require higher levels of protein than adult dogs of the same breed to promote proper growth and development. Protein should account for at least 25% of energy; however protein requirements also depend on the digestibility of the protein and age of the puppy. Amino acid and nitrogen requirements decrease between 10–14 weeks, indicating that different protein levels are often beneficial before and after 14 weeks of age. Before 14 weeks of age, a protein level of 250 g/kg of diet (25% of the diet) containing 4.0 kcal ME/g will result in optimal growth. After 14 weeks of age, protein requirements decrease to 200 g/kg of diet (20% of the diet) for optimal growth.