Yes, for most people. A milk-and-honey combination may help improve sleep quality — honey’s natural sugars cause a small insulin spike that helps tryptophan cross the blood-brain barrier more efficiently, enhancing its sleep-promoting effect.

It depends on your goal: For sleep only → any milk works. All types contain tryptophan and magnesium. For weight loss → choose low-fat or skimmed milk (~60–100 calories per glass). For muscle gain or recovery → whole… 

Not if you are drinking a single glass and it fits within your daily calorie budget. One study found that drinking milk before bed actually increased resting metabolic rate the following morning — meaning your body burns… 

Inndirectly, yes. Milk contains tryptophan → your body converts tryptophan into serotonin → serotonin is then converted into melatonin. This is a natural pathway that supports your circadian rhythm without any supplements.