GLOSSARY

Pre-Sleep Casein supplies protein before sleep or supports overnight recovery, potentially helping meet daily needs without making a bedtime supplement mandatory.

For example, review the evening meal before adding a bedtime protein snack. If a snack helps complete the day's intake and is comfortable, it can fit the plan. It should still allow good sleep; neither a late stimulant-containing recovery drink nor an oversized meal serves recovery simply because it contains protein.

Sleep supports recovery and cannot be replaced by a nutrient or drink. Protein consumed before sleep can provide amino acids overnight and may be useful when it helps meet the athlete's daily needs. Evidence from particular training studies does not establish that everyone needs a bedtime supplement or that casein is mandatory. Consider the evening meal, total protein, gastrointestinal comfort and sleep quality. Late caffeine, very large meals or excessive drinking can interfere with the recovery goal.

Muscle protein synthesis builds proteins, while breakdown removes them; net balance reflects the difference over an interval. Feeding essential amino acids and resistance exercise can stimulate synthesis, but a short-term synthesis measurement is not identical to a long-term gain in muscle size. Adequate daily protein, energy and repeated training are central. Protein distribution creates repeated feeding opportunities, and the useful amount per meal depends on body size, age, food quality and the exercise performed.

Protein quality reflects digestibility and the supply of indispensable amino acids. Whey, casein, milk, soy and other foods differ in composition and digestion patterns, but a faster blood amino-acid rise does not automatically establish a better long-term outcome. Plant-based diets can support recovery when protein amounts, sources and overall intake are well planned. Blending sources or adjusting portions may be useful; the comparison should consider the complete meal and daily diet rather than a single ingredient label.