Overall dietary patterns and obesity directly impact systemic inflammation, which contributes to many of the underlying pathways of plaque psoriasis. Nutrition should complement medical therapy for psoriasis rather than act as a replacement. Ultimately, structuring the conversation about nutrition and weight management around addressing systemic inflammation—instead of focusing on appearance—can empower patients with plaque psoriasis to actively support their comprehensive treatment plan.

If there is one topic that has received a lot of attention over the last decade, it is nutrition and psoriasis. I probably discuss this to some degree with almost every patient, whether I initiate the conversation or they bring it up, the latter of which is actually very common now. Patients are inundated with recommendations to eliminate gluten, dairy, seed oils, nightshades, sugar—you name it—from their diet. Many arrive to their appointment convinced that if they identify the right diet or remove the right food, they can then manage their plaque psoriasis without medication.

However, this is simply not true. I tell my patients that if they eat things that we know are inherently bad for them, these foods will likely be bad for their inflammation and bad for their psoriasis as well. I always emphasize that diet does not influence psoriasis because of one magical food or one inflammatory ingredient; instead, it is the overall dietary pattern that matters.

We know that obesity is an independent risk factor for psoriasis and, in general, promotes a chronic inflammatory state, even without considering psoriasis. People with obesity have an increased production of inflammatory mediators, such as TNF-α and IL-17, 2 of the central pathways involved in psoriasis pathogenesis. Diet can amplify these inflammatory pathways, just as obesity can. For this reason, I try to steer the conversation away from eliminating individual foods and toward considering overall dietary patterns.

On the flip side, there is reasonably good evidence supporting foods that should be added to a person’s diet. Fruits, vegetables, fiber, unsaturated fats, and omega-3 fatty acids have all been associated with lower levels of systemic inflammation. In contrast, the typical Western diet is often rich in saturated fats and refined carbohydrates, both of which can promote inflammatory signaling. These same dietary patterns are associated with cardiovascular disease, insulin resistance, and many of the other comorbidities that we commonly see in patients with psoriasis.

I always emphasize that a healthy diet should be part of the overall treatment regimen for patients with plaque psoriasis, alongside effective medical therapy. This is an empowering message because it reminds patients that there are many different things that they can do to improve their health. They do not have to choose between medication and lifestyle—they can benefit from optimizing both. I look at nutrition the same way that I look at smoking cessation, exercise, stress management, and sleep disorder treatment. No single intervention completely manages psoriasis on its own. Each intervention is one piece of an overall management strategy that is aimed at reducing systemic inflammation.

For patients with obesity, framing the discussion around treating inflammation rather than improving appearance changes the conversation. This approach also removes judgment. Rather than focusing on weight as a cosmetic or social issue, we can discuss it as an inflammatory disease modifier. We are treating a medical problem, and I think that this is a much more productive conversation.

Ultimately, nutrition is one part of comprehensive psoriasis care. Along with appropriate medical therapy, regular exercise, smoking cessation, stress management, and the management of associated comorbidities, healthy nutrition helps reduce systemic inflammation and supports better long-term outcomes in patients with plaque psoriasis. It is not about replacing one treatment with another; it is about doing everything we can to give patients the best possible results.