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GP Clinic · Iluka WA 6028
Mon–Fri: 8:30AM–5:30PM | Sat: 8:30–11AM | Sun: 8:30AM–12:30PM
GP Clinic · Iluka WA 6028
Zero calories doesn't mean zero risk. Here's what the latest clinical research says about Pepsi Max, Coke Zero, and artificially sweetened beverages.
Research from large cohort studies involving hundreds of thousands of participants reveals significant health associations with regular consumption of artificially sweetened beverages.
An umbrella review found highly suggestive evidence linking artificially sweetened beverages to higher risk of cardiovascular disease, hypertension, and all-cause mortality.[2]
In the NutriNet-Santé cohort of over 103,000 participants, artificial sweetener intake was associated with a 9% increased CVD risk (HR 1.09) and an 18% increased cerebrovascular disease risk (HR 1.18).[3]
A 2025 study in Cell Metabolism found aspartame increased insulin secretion via parasympathetic activation, aggravating atherosclerotic plaque formation through an insulin-CX3CL1-macrophage pathway.[4]
In the Women's Health Initiative (81,000+ postmenopausal women), consuming ≥2 diet drinks daily was associated with 23% increased all-stroke risk and more than doubled small artery occlusion stroke risk in women with obesity (HR 2.44).[5]
A UK Biobank study of 133,285 participants found artificial sweetener intake associated with increased type 2 diabetes risk, with 70% of this relationship mediated by prior diabetes development — suggesting artificial sweeteners may contribute to diabetes pathogenesis.[9]
A population-based study found frequent consumers had a 3.74-fold increased odds of diabetes (95% CI 3.06–4.57) compared to non-consumers.[10]
A landmark RCT in 120 healthy adults found saccharin and sucralose significantly impaired glycaemic responses, with effects mediated through distinct alterations in stool and oral microbiome composition.[12]
When microbiomes from human responders were transplanted into germ-free mice, the mice developed similar glycaemic impairments — demonstrating direct causality.[12]
The microbiome response is highly personalised — some individuals show marked glycaemic deterioration while others remain largely unaffected.[12]
Diet sodas remain highly erosive to tooth enamel despite containing no sugar. The erosive potential stems from carbonic acid and phosphoric acid — not sugar content.
| Beverage | pH | Enamel Loss (7 Days) | Risk |
|---|---|---|---|
| Regular Cola | 2.44 | 7.5 mg | High |
| Diet Cola | 2.83 | 5.2 mg | High |
| Water | 7.0 | Negligible | None |
A meta-analysis found soft drinks overall had an odds ratio of 2.41 for dental erosion (95% CI 2.03–2.85).[18]
IARC classified aspartame as "possibly carcinogenic" (Group 2B) in 2023 — reflecting limited, not established, evidence. Many everyday items share this classification.
| Study | Finding | Verdict |
|---|---|---|
| NutriNet-Santé cohort | +13% overall cancer risk (HR 1.13) | Associative |
| Cancer Prevention Study-II (2026) | +13% all cancers; no dose-response | Inconclusive |
| Nurses' Health Studies (30 yrs) | No association — breast cancer HR 1.00 | No link |
| Umbrella meta-analysis (35 datasets) | RR 0.99 — no significant association | No link |
The Bottom Line
The 2023 WHO guidelines discourage using nonnutritive sweeteners for weight loss or reducing noncommunicable disease risk, citing no long-term benefit and potential harm.[28]
While diet sodas eliminate sugar calories and may provide short-term benefits when substituting for sugar-sweetened beverages, chronic consumption is associated with cardiovascular disease, metabolic dysfunction, microbiome disruption, and dental erosion. They should not be considered health-promoting.
Have questions about your diet and health? Our team at Iluka Medical Centre provides personalised, evidence-based advice.
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Iluka WA 6028 · (08) 6119 4700