Tag: Rancid protein powder

According to food scientists, while most protein powder has a shelf life of up to two years if stored correctly, improper conditions can cause it to spoil much faster. Knowing what does bad protein powder look like can help you avoid a nasty surprise and potential stomach upset.

According to one study, whey protein powder can degrade in quality and effectiveness over time, especially if stored improperly at high temperatures. The "best by" date is merely a guide, so **how do you know your protein powder is bad**? The answer lies in trusting your senses and looking for definitive signs of spoilage.