You can drink protein powder on an empty stomach. Protein powder is a nutritional agent that can provide protein and energy to the body. Protein powder is not stimulating, so drinking it on an empty stomach will not cause damage to the gastric mucosa and will not induce symptoms such as bloating and stomach pain. Drinking protein powder on an empty stomach will be more easily absorbed by the gastrointestinal system, and protein powder also has the effect of protecting the gastric mucosa, which can promote the recovery of stomach diseases. When drinking protein powder, you need to pay attention to try to avoid using too high a temperature of water for brewing, otherwise it will lead to protein denaturation, resulting in a waste of nutrition. When drinking protein powder, you can use water below 40 degrees Celsius for soaking, which can retain the nutrients of protein and will not cause irritation to the stomach mucosa. When drinking protein powder, you also need to pay attention to the dosage, too much protein powder will lead to excess nutrition, which has a negative impact on health.