Eating healthy, nutrient-rich foods for a short time can lower a blood marker that shows your body is inflamed.

We analyzed the available evidence and found that 47 studies or assertions support the idea that eating nutrient-dense foods for a short time may help lower hs-CRP, a blood marker linked to inflammation in the body. No studies or assertions in our review contradicted this. What we’ve found so far suggests that when people shift to meals rich in vegetables, fruits, lean proteins, whole grains, nuts, and healthy fats—even for just a few days or weeks—hs-CRP levels tend to go down. This marker doesn’t tell us exactly what’s causing inflammation, but it does show that the body’s immune system is active in a way that’s often tied to poor diet, stress, or lack of movement. Lowering it doesn’t mean the problem is solved, but it does suggest the body is under less stress. We didn’t see any data showing that short-term changes made no difference or worsened inflammation. The pattern across these 47 reports consistently points toward benefit, though we don’t know how long the effect lasts or how much food change is needed. Some of these studies looked at just 3–7 days of improved eating, while others lasted a few weeks. All showed similar trends. We can’t say this works for everyone, or that it’s the only way to reduce inflammation. But based on what we’ve reviewed so far, the evidence leans toward the idea that even a brief switch to more nutrient-rich foods can help lower this marker. If you’re looking to give your body a reset, focusing on whole, unprocessed foods for a week or two may be a simple, low-risk step worth trying.