Protein intake for most adults is 0.8 g/kg daily; athletes often aim for 1.2–2.0 g/kg and older adults benefit from 1.0–1.2 g/kg.

Most adults do well with about 0.8 g of protein per kilogram of body weight each day, with higher needs for training and aging.

No, muscle growth needs amino acids from protein; training alone cannot add new tissue.

Yes, protein after training can raise muscle glycogen synthesis when carb intake sits below the optimal range.

No, new muscle tissue doesn’t accrue without dietary protein; amino acids from food are needed to tip muscle protein balance above zero.

Per serving, whey proteins usually deliver 20–27 grams of protein, with isolate averaging on the higher end.

One cup of diced watermelon (152 g) contains 0.9 g of protein; 100 g delivers 0.6 g, so servings are low in protein.

A 1/2-cup drained serving of canned butter beans delivers about 5–7 g of protein, which comes to roughly 10–14 g per cup.

One drained 5-oz can of albacore tuna delivers about 22–32 g of protein, depending on brand, liquid, and drain weight.

One standard cup of canned baked beans packs about 12 grams of protein, with serving size and brand shifting the total.