# Take 2 Tablespoons of This for Digestion?
Here’s What the Evidence Really Says
Apple cider vinegar is often promoted online as a simple digestive remedy: take one or two tablespoons, usually diluted in water, and expect less bloating, better digestion, or more regular bowel movements.
The idea sounds appealing, but the evidence is more complicated.
The original viral article suggests that apple cider vinegar, lemon juice, or honey water may improve digestion. However, there is **not strong clinical evidence showing that two tablespoons of apple cider vinegar reliably relieve bloating, constipation, or indigestion in healthy adults**. Research on vinegar has focused much more on blood sugar and other metabolic effects than on treating digestive symptoms.
So what can apple cider vinegar actually do—and when might it make digestive symptoms worse?
## What Is Apple Cider Vinegar?
Apple cider vinegar, commonly called ACV, is made by fermenting apple sugars into alcohol and then converting that alcohol into acetic acid.
Acetic acid is responsible for much of vinegar’s characteristic sour taste and many of its biological effects.
Typical apple cider vinegar contains approximately 5% acetic acid.
Because it is highly acidic, it should generally be diluted before drinking.
## Why Do People Take 1–2 Tablespoons Before Meals?
One common routine involves mixing approximately one or two tablespoons of apple cider vinegar into a glass of water and drinking it before or with a meal.
Supporters claim it may:
* Improve digestion
* Reduce bloating
* Help stabilize blood sugar
* Increase fullness
* Improve nutrient absorption
Some of these claims are more credible than others.
The strongest evidence relates to **blood glucose after meals**, not to treating digestive disorders.
## 1. Vinegar May Affect Blood Sugar After Meals
Several controlled studies and meta-analyses suggest that vinegar consumed with meals can modestly reduce post-meal glucose and insulin responses in some people.
A 2026 umbrella review of meta-analyses found favorable effects on several metabolic outcomes, including fasting and post-meal blood glucose, although results varied between studies and not every metabolic marker improved.
This does **not** mean apple cider vinegar is a diabetes treatment.
People taking insulin or glucose-lowering medicines should not use vinegar as a substitute for prescribed treatment.
## 2. It May Slow Stomach Emptying
One proposed mechanism behind vinegar’s effect on post-meal blood sugar is that acetic acid may slow gastric emptying—the rate at which food leaves the stomach.Biological Sciences
That can sometimes reduce how quickly carbohydrates enter the bloodstream.
But there is an important catch.
Slower stomach emptying is **not necessarily beneficial for digestion**.
For people who already have delayed gastric emptying, such as some people with diabetic gastroparesis, adding vinegar could potentially worsen feelings of:
* Fullness
* Nausea
* Bloating
* Abdominal discomfort
So describing vinegar simply as something that “improves digestion” is misleading.
## 3. Does Apple Cider Vinegar Reduce Bloating?
There is currently no strong evidence that apple cider vinegar consistently treats bloating.
Bloating can have many causes, including:
