Guide

No, standard protein shakes are not allowed the day before a colonoscopy — the required clear liquid diet excludes dairy, protein solids.

No, a protein shake breaks a fast because it contains calories and amino acids that trigger an insulin response.

Yes, many people with lactose intolerance can tolerate whey protein isolate, which has most of its lactose removed during processing — but whey.

A protein shake before bed may support overnight muscle recovery and growth, especially when it contains slow-digesting casein protein.

Yes, having a protein shake before a workout can support muscle growth and repair, though research suggests total daily protein intake matters more.

Yes, most healthy adults can safely consume multiple protein shakes daily, but experts typically recommend 1-3 shakes and meeting most protein needs.

No, if you have a diagnosed milk allergy you should avoid standard whey protein, since whey is a concentrated milk protein that triggers immune.

Yes, a protein shake before a workout can support muscle repair and performance, but total daily protein intake matters more than precise timing.

Yes, it is generally safe for most healthy adults to have more than one protein shake per day.

Yes, you can have protein shake both before and after a workout, but total daily protein intake matters more than the exact timing.