Dr Linia Patel (Phd), RD takes an evidence based approach, asking does apple cider vinegar live up to the hype?
Move over celery juice – there’s a new darling in the wellness world. Influencers (with the Glucose Goddess leading the charge) have been touting apple cider vinegar (ACV) as a daily ritual with near-magical benefits. A shot a day, they say, can reduce blood sugar spikes, support weight loss, improve gut health, freshen breath, aid digestion, calm inflammation and even double up as a skincare ingredient. But does the science live up to the hype? Let’s take a closer look.
What it is
Apple cider vinegar is essentially vinegar made from fermented apple juice. Like all vinegars, it contains acetic acid – the main compound thought to be behind many of its health effects – alongside small amounts of plant compounds naturally found in apples. You’ll find it in different forms: filtered, unfiltered or even flavoured. Unfiltered ACV contains the famous ‘mother’ – a colony of bacteria and enzymes – while filtered versions have this removed for clarity. Quality varies widely, but loosely strained, minimally processed varieties tend to retain more of the beneficial compounds.
Claimed benefits: Do they stack up?
The main claims centre on blood sugar control, weight management and gut health.
Blood sugar control
Scroll through social media and you’ll likely see those neat glucose curve graphics. ACV advocates recommend taking a shot before a starchy meal, arguing it slows carbohydrate breakdown and reduces post-meal glucose spikes.
The science? Evidence suggests vinegar – including ACV – can modestly lower the glycaemic impact of carbohydrate-rich meals. This makes sense, as acetic acid itself appears to be the main driver. While promising, the effect is relatively small and not unique to apple cider vinegar. More research is needed to understand whether it has any meaningful role beyond what other vinegars already offer.
Weight management
A few small studies suggest that ACV might mildly suppress appetite and support weight loss. For example, in one trial, overweight participants who took 15–30ml daily lost 1.2–1.9kg over 12 weeks compared to no change in the placebo group. While that sounds exciting, other research shows no significant effect. Overall, the evidence is mixed and still too limited to draw strong conclusions.
Gut health and beyond
Because unfiltered ACV contains bacteria and bioactive plant compounds, it’s sometimes positioned as a probiotic-like supplement. While intriguing, current research doesn’t yet confirm a meaningful impact on gut microbiota. Other suggested benefits – like helping with bad breath, inflammation or skin health – are mostly anecdotal and not well supported by clinical studies.
Side effects and considerations
Like any vinegar, ACV is highly acidic. Taken straight and in excess, it can erode tooth enamel or irritate the throat and stomach. There are also broader associations between frequent intake of pickled or vinegared foods and higher gastric cancer risk, though the exact cause is unclear. Diluting ACV in water or using it in food (such as salad dressings) is a much safer approach.
Take-home message
When it comes to ACV, the influencer hype is ahead of the science. While there is some evidence of modest benefits for blood sugar control and weight management, the research is still small-scale, inconsistent and far from conclusive.
If you enjoy it, there’s no harm in adding a splash of apple cider vinegar to salads or marinades. But the idea of taking daily ‘shots’ is more trendy than evidence based. A sensible dose used in food – around 30ml spread across meals – is likely safe for most people but we still need larger, high-quality trials before recommending ACV as a health supplement.
For now, think of it as a tangy flavour booster with a few potential perks – not a miracle in a bottle.
Discover more of Dr Linia Patel’s evidence-based nutrition information; this one on energy drinks.
References
- Examine.com. Apple cider vinegar. Accessed here on 2 September 2025: https://examine.com/foods/acv
- Khezri et al (2018), Beneficial effects of Apple Cider Vinegar on weight management, Visceral Adiposity Index and lipid profile in overweight or obese subjects receiving restricted calorie diet: A randomized clinical trial, Journal of Functional Foods, 15: 95-102.
- Gheflati A et al (2019), The effect of apple vinegar consumption on glycemic indices, blood pressure, oxidative stress, and homocysteine in patients with type 2 diabetes and dyslipidemia: A randomized controlled clinical trial, Clin Nutr ESPEN, 33: 132-138.
- Song J et al (2019), Analysis of microbial diversity in apple cider vinegar fermentation process through 16d r DNA sequencing, Food Science & Nutrition, 7(4): 1,230-38.
