Social Media Mythbusters: The Mediterranean Diet

From viral skin care hacks to trendy treatment devices, social media is shaping the questions patients bring into the exam room every day. In Dermatology Times’ new weekly series, Social Media Mythbusters, we break down trending claims clinicians are hearing in practice—exploring the proposed mechanism, what the evidence shows (or doesn’t), and whether each trend holds up under scrutiny.

In this edition, we’re examining the Mediterranean diet (MedDiet) and its impact on skin health and inflammation.

Have a social media trend you’d like us to investigate next? Send us the social media myths your patients are asking about, and we may feature them in an upcoming edition. Connect with us on our social media or email us at [email protected].

The Trend

The MedDiet has migrated from the cardiology literature to wellness culture, and patients are now arriving with specific dermatologic claims: that adopting olive oil, fish, whole grains, vegetables, and legumes while cutting red meat and ultraprocessed foods will clear their psoriasis, resolve their acne, and slow visible skin aging. Content creators are framing it as the "anti-inflammatory diet your dermatologist won't tell you about." Functional medicine influencers invoke the gut-skin axis as a near-mystical explanation for why eating like this will treat facial skin conditions.

Unlike many social media skin trends, this one is being represented in a growing body of clinical literature. The challenge for clinicians is separating what the data actually support from the dramatic extrapolations being made on behalf of it.

Terri DeNeui, DNP, APRN, ACNP-BC (@drterrideneui)

The Mechanism

The MedDiet's potential dermatologic relevance operates through several overlapping pathways. The diet is rich in ω-3 fatty acids (fish and walnuts), polyphenols (olive oil, vegetables, and fruits), and dietary fiber—all of which suppress pro-inflammatory cytokines, including tumor necrosis factor-α, IL-6, and IL-17, the same mediators central to psoriasis, hidradenitis suppurativa (HS), and acne pathogenesis. These foods are also inherently low in advanced glycation end products. These are formed in high-heat cooking of processed and animal-based foods and are absorbed systemically, binding RAGE receptors and driving oxidative stress and inflammation that contribute directly to dermal aging and barrier dysfunction.¹

Additionally, the diet is inherently low-glycemic, emphasizing whole grains, legumes, and vegetables over refined carbohydrates. High glycemic load diets drive insulin and IGF1 signaling, which upregulates sebum production and promotes keratinocyte proliferation, well-established acne-aggravating mechanisms. This pathway is probably the most robustly supported diet-acne link in the literature.

The Evidence

The strongest evidence of dermatologic relevance has been found in patients with psoriasis. The first-of-its-kind MEDIPSO trial enrolled 38 adults with mild to moderate disease (Psoriasis Area and Severity Index [PASI], 2-10) on stable topical therapy. Participants were randomized 1:1 to either a 16-week dietitian-guided MedDiet program—including nutritional counseling, educational materials, and weekly provision of extra virgin olive oil—or a control group receiving standard low-fat dietary advice without dietitian supervision. At 16 weeks, the intervention group showed statistically significant improvement in PASI score compared with controls, with a mean reduction of 3.4 points and 47% of participants achieving meaningful clinical response. Although the study was small, it is the first randomized controlled trial in this space, filling a critical gap that prior observational studies could not.²

Currently, there are no specific trials evaluating the MedDiet’s smaller, more frequent meals for acne treatment; however, with the diet’s low glycemic load and anti-inflammatory polyphenols, the cutaneous inflammatory cascade could be modulated, and blood glucose spikes linked to acne flare-ups and sebum overproduction could be stabilized, according to one review.³ Evidence is also limited in HS, but a 2025 review synthesizing dietary interventions in HS found that survey studies indicate many patients incorporate dietary changes to manage their HS symptoms.⁴ Some reported perceived benefits from Mediterranean, Paleolithic, and ketogenic diets, while increased consumption of dairy and sugar has been associated with worse HS severity and increased flares in some cohorts.

The AGE/RAGE pathway described in a 2024 Experimental Dermatology review is relevant here.⁵ Ultraprocessed, high heat–cooked, and high-sugar diets generate dietary and endogenous AGEs that cross-link dermal collagen, reduce elasticity, drive oxidative stress, and accelerate photoaging. The MedDiet's emphasis on minimally processed, polyphenol-rich foods directly opposes this mechanism. But most overclaimed territory on social media is the idea that the MedDiet alone can substitute for or meaningfully augment biologic therapy in moderate to severe inflammatory skin disease. Patients should not be managing their disease with dietary changes while delaying systemic or biologic therapy.

Doris Day, MD (@drdorisday)

The Verdict

Is this a myth? No! But there’s a catch…

The MedDiet's mechanistic case for skin benefit is among the most credible of any dietary pattern discussed on social media. The MEDIPSO trial now provides solid evidence of clinically meaningful PASI improvement with a structured MedDiet intervention in mild to moderate psoriasis. The low-glycemic dimension has reasonable trial support for acne, and the AGE-reduction mechanism provides a plausible antiaging narrative.

The appropriate scope, however, is disease-adjunctive rather than disease-replacing. The MedDiet's impact on psoriasis was comparable to the effect of a low-potency topical agent, not a biologic. It supports weight control and cardiovascular risk reduction (comorbidities highly relevant to patients with psoriasis and HS), which may produce secondary skin benefits. For most patients, this dietary pattern is healthful, low-risk, and consistent with the general direction of dermatologic nutritional guidance. Clinicians can endorse it with confidence, provided expectations are calibrated to what a dietary intervention can realistically achieve.

The Script

If a patient comes in wondering whether they should adopt the MedDiet, here are some important points to hit:

• Set realistic expectations: The data are there, particularly in psoriasis, but remember that the effect is modest compared with what’s seen on social media.
• Explain its mechanism of action: It's working on the inflammatory baseline, but it won’t work in the same way as topical therapy does. And it won’t magically “clear” skin.
• Remind that this lifestyle is not a replacement: It works best alongside a patient’s topical or systemic regimen—not instead of it. Stopping prescription treatments carries a real risk of flare.
• Attribute improvement to the right thing: Food can’t cure moderate to severe disease. Remind that biologics and other treatments are doing the heavy lifting.

References

1. Annunziata G, Verde L, Zink A, et al. Plant-based foods for chronic skin diseases: a focus on the Mediterranean diet. Curr Nutr Rep. 2025;14(1):42. doi:10.1007/s13668-025-00632-5

2. Perez-Bootello J, Berna-Rico E, Abbad-Jaime de Aragon C, et al. Mediterranean diet and patients with psoriasis: the MEDIPSO randomized clinical trial. JAMA Dermatol. 2025;161(12):1215-1223. doi:10.1001/jamadermatol.2025.3410

3. Taha S, Shakhshir M, Zyoud SH. The mediterranean diet and acne vulgaris: a systematic review and meta-analysis. Nutr Metab (Lond). 2025;22(1):132. doi:10.1186/s12986-025-01033-9

4. Lam T, Gruzmark F, Ondreyka J, et al. Food as medicine in hidradenitis suppurativa: a review of dietary effects on HS pathogenesis. Skin Appendage Disord. 2025;31(5). doi:10.1177/27683192251376656

5. Wang L, Jiang Y, Zhao C. The effects of advanced glycation end-products on skin and potential anti-glycation strategies. Exp Dermatol. 2024;33(4):e15065. doi:10.1111/exd.15065