You’ve probably heard it before: “Cut out dairy—it causes inflammation.” Whether it’s from a wellness influencer, a plant-based advocate, or your mate who swears oat milk changed their life, the idea that dairy fuels inflammation has become a sort of modern health gospel. But is there any scientific weight behind the claim, or are we just chasing another dietary scapegoat?
In a world increasingly obsessed with gut health, joint pain, skin flare-ups and chronic disease prevention, inflammation has become the health villain of the decade. And dairy—that’s milk, cheese, yoghurt and butter—is often painted as its partner in crime. So should we pour our lattes down the sink? Shall we cancel that cheese board? Let’s ask “what does the evidence actually say?“
This post takes a clear-headed look at the research. We’ll unpack what “inflammation” really means in a biological sense, explore how dairy interacts with inflammatory markers in the body, and examine whether dairy affects people differently based on their genetics, gut microbiota, or baseline health.
Whether you’re plant-based, paleo, or somewhere in between, understanding the role dairy might—or might not—play in systemic inflammation could help you make smarter choices for your long-term wellbeing. The aim here isn’t to promote or demonise dairy, but to clarify the facts so you can decide for yourself with a bit more confidence and a lot less confusion.
Let’s dive into what the science really says about dairy and inflammation.
Before diving into the evidence, it’s important to clarify a few key concepts that will help make sense of the research on dairy and inflammation.
Inflammation is the body’s natural response to injury, infection or stress. In the short term, it’s a good thing—it helps you heal. But chronic inflammation, the kind that lingers at a low level over time, has been linked to many age-related diseases, including heart disease, type 2 diabetes, certain cancers, and cognitive decline (Furman et al., 2019). This ongoing low-grade inflammation, sometimes called ‘inflammageing‘, is increasingly recognised as a major driver of age-related health decline (Calder et al., 2017).
Researchers measure inflammation in the body using specific blood markers. The most commonly studied include:
C-reactive protein (CRP): A general marker of systemic inflammation
Interleukin-6 (IL-6): A cytokine (signalling protein) that rises during immune response
Tumour necrosis factor-alpha (TNF-α): Another cytokine involved in inflammatory processes
If dairy truly increases inflammation, we’d expect to see these markers consistently rise in people who consume it regularly.
Not all dairy is created equal. Studies often differentiate between:
High-fat dairy (e.g. cheese, butter, whole milk)
Low-fat or fermented dairy (e.g. yoghurt, kefir)
Processed vs. unprocessed dairy
These distinctions matter, as their effects on the body—and on inflammation—can vary significantly.
Some people digest dairy easily, while others experience discomfort, bloating or skin issues. This is often due to lactose intolerance (an inability to digest milk sugar) or cow’s milk protein sensitivity, which can trigger immune responses in susceptible individuals. However, such sensitivities don’t automatically mean inflammation occurs in everyone.
Understanding these terms sets the stage for evaluating what the evidence actually says—because the answer isn’t as black-and-white as headlines might suggest.
Recent meta-analyses provide some of the most reliable insights:
Moosavian et al. (2020) pooled 11 RCTs (663 adults) comparing high dairy vs. low/no dairy diets. They found that dairy significantly reduced inflammatory markers: CRP by −0.24 mg/L (95% CI: −0.35 to −0.14), TNF‑α by −0.66 pg/mL (−1.23 to −0.09), IL‑6 by −0.74 pg/mL (−1.36 to −0.12), and MCP‑1 by −25.6 pg/mL (−50.3 to −0.9). However, subgroup analyses of cross-over trials showed no significant effect. Additionally, dairy increased adiponectin by +2.42 μg/mL (0.17–4.66)
Nieman et al. (2020) reviewed 27 RCTs and found neutral to beneficial effects on inflammatory biomarkers. Of 19 dairy-focused trials, 8 reported reductions in at least one marker; none showed increases. Notably, dairy protein supplements alone had no effect
In plain English: When dietary studies are properly controlled, adding dairy to the diet tends to reduce or not affect markers of low-grade inflammation—but results vary depending on study design. Meta-analyses show a small but consistent benefit, particularly in parallel-arm trials.
There’s growing evidence that fermentation may matter:
Zhang et al. (2023) A 2023 meta-analysis of 14 trials on fermented dairy (yogurt, kefir, fermented milk) found a modest but statistically significant reduction in CRP (SMD = −0.21; 95% CI: −0.40, −0.02; P = 0.033), while most other markers (TNF‑α, IL‑6) remained unchanged. IFN‑γ increased slightly (SMD = +0.12; 95% CI: 0.01, 0.23; P = 0.033)
Voutilainen et al. 2022 Observational data from the Kuopio cohort (n ≈ 1,338 Finnish men) found that fermented dairy intake had no association with hs‑CRP, but butter consumption was linked to higher inflammation (OR for elevated hs‑CRP > 3 mg/L among highest vs. lowest butter intake = 2.50; P-trend = 0.02)
In plain English: Fermented dairy likely has a slightly anti-inflammatory effect, while butter—representative of dairy fat separated from other dairy matrix—could raise inflammation.
Epidemiological studies assess real-world dairy intake, offering complementary insights:
The ATTICA study (Greece; n ≈ 3,000) reported that people consuming 11–14 servings of dairy weekly had 16% lower CRP, 5% lower IL‑6, and 12% lower TNF‑α than those with < 8 servings (p < 0.05); even larger reductions (29%, 9%, 20%) occurred in those eating >14 servings (p < 0.01) after adjusting for confounders
The Women’s Health Initiative (postmenopausal women) also showed incremental intake of dairy (full- or low-fat milk, yogurt, cheese) correlated with ~10% lower CRP and IL‑6 per serving; low-fat dairy was additionally associated with a 2.5% reduction in TNF‑R1
In plain English: These large cohorts support a consistent inverse relationship between dairy intake and systemic inflammatory markers.
Across high-quality evidence, whole or fermented dairy tends to be neutral or slightly anti-inflammatory. Butter and isolated dairy fats/proteins are likely counterproductive (inflammatory). Effects are generally small (e.g. CRP reductions under 0.3 mg/L), but consistent and rarely harmful in healthy adults.
While we’ve found that most dairy — especially fermented types like yoghurt and kefir — does not appear to cause inflammation in healthy individuals, and may even have mild anti-inflammatory effects, it’s crucial to zoom out. Let’s see what this all means. Should we be adding fermented dairy products to our diet?
If your goal is to reduce chronic inflammation, live longer and enjoy more energy and vitality, then the question isn’t “should I add fermented dairy?” — it’s “What’s optimal for me?”… and The evidence repeatedly shows that whole food, plant-based diets outperform dairy-inclusive diets when it comes to long-term health and inflammation reduction (Craddock et al., 2019).
Here’s how you can use that knowledge to upgrade your own diet:
While fermented dairy may offer minor anti-inflammatory properties in some populations, it pales in comparison to the impact of specific whole plant foods. These aren’t just neutral swaps — many demonstrate measurable, clinically relevant reductions in systemic inflammation, particularly in markers like C-reactive protein (CRP), interleukin-6 (IL-6), and tumour necrosis factor-alpha (TNF-α).
Below are the most evidence-supported anti-inflammatory plant foods, along with the mechanisms that make them so powerful:
Vegetables like kale, spinach, broccoli, and Brussels sprouts are rich in glucosinolates, polyphenols, and fibre, all linked to significant reductions in CRP and IL-6.
A study by Esmailzadeh et al. (2011) found that higher vegetable intake was associated with 37% lower odds of elevated CRP (p < 0.01).
Broccoli in particular has been shown to activate Nrf2, a key anti-inflammatory pathway (Bahadoran et al. 2022).
Rich in anthocyanins, vitamin C, and other flavonoids, berries like blueberries, blackberries, and acai combat oxidative stress and inflammation at a cellular level.
In a randomised trial, daily blueberry consumption for six weeks significantly reduced CRP and IL-6 in adults with metabolic syndrome (Basu et al. 2010).
These compounds also downregulate NF-κB, a master regulator of inflammatory genes (Gleeson et al. 2011).
Beans, lentils, and chickpeas are rich in resistant starch, prebiotic fibres, and plant protein, which feed beneficial gut microbes and lower systemic inflammation.
A meta-analysis by Afshin et al. (2014) confirmed that increased legume consumption correlates with lower inflammatory biomarkers and improved metabolic health.
One mechanism involves improved gut integrity and reduced endotoxin leakage, a major driver of chronic inflammation (Myles 2014).
These foods are high in ALA (a plant-based omega-3), magnesium, and polyphenols — all known to reduce inflammatory mediators.
Walnuts, in particular, have been shown to significantly lower IL-6 and CRP over an 8-week intervention (Rajaram et al. 2009).
Flaxseeds also improve the omega-3 to omega-6 ratio, a key marker of inflammation resolution (Yazdi et al. 2019).
Unlike refined grains, intact whole grains retain their fibre, phytochemicals, and B vitamins, which together contribute to inflammation control.
In a crossover trial, replacing refined carbohydrates with whole grains led to significantly reduced CRP levels after just four weeks (Masters et al. 2017).
β-glucan in oats enhances immune modulation and gut health — both linked to lower systemic inflammation (Vitaglione et al. 2015).
While fermented dairy may modestly lower inflammation in certain populations, these whole plant foods offer broader systemic benefits:
They are anti-inflammatory, and antioxidative, gut-supportive, fibre-rich, and cardioprotective.
They don’t carry the same potential downsides (e.g., saturated fat, IGF-1 stimulation, or lactose intolerance) found in even high-quality dairy.
Most importantly, their benefits are dose-dependent — the more you eat of them, the more protection you get (Satija et al. 2016).
Inflammation plays a pivotal role in almost every chronic disease we hope to avoid — from heart disease and type 2 diabetes, to arthritis, autoimmune conditions, and even depression. So it’s no wonder people are asking tough questions about the food they eat daily, like “Does dairy really cause inflammation?”
The truth, as we’ve seen, is nuanced. Fermented dairy products may offer minor anti-inflammatory benefits — particularly in healthy individuals with no dairy intolerances. But here’s the more important takeaway… If your goal is to live longer, move better, and feel clearer for decades to come, simply adding yoghurt isn’t enough.
The strongest evidence we have points again and again to whole food, plant-based diets as the most powerful dietary pattern for reducing chronic inflammation and enhancing longevity. Not only do they contain more anti-inflammatory nutrients, but they also eliminate the need for guesswork around which foods might help or harm.
At Centre of Nutrition, we help people cut through the noise and build nutrition plans that align with their long-term goals — not just temporary fixes.
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