There is very limited research that studies the long-term effects of pea protein powder on overall body inflammation. A 2021 study points out that pea protein may help control inflammation levels. However, the study looked at rat models, not humans.
Another factor to consider is the ingredients of the overall product. If the protein powder contains ingredients that promote inflammation, such as omega-6, it could counteract anti-inflammatory ingredients such as omega-3. However, more research is needed on this subject.