What is Eno Powder?

Eno powder is an over-the-counter antacid product used to provide relief from acidity and symptoms like heartburn, nausea, gas, and bloating.

What is Eno Powder

The main ingredients in Eno powder are sodium bicarbonate, citric acid, and sodium carbonate.

These ingredients work together to neutralize excess stomach acid and regulate pH levels in the digestive system.

History of Eno Powder

Eno powder was first created and marketed in 1852 by British pharmacist James Crossley Eno. As the story goes, while working at an infirmary pharmacy, Eno adopted an effervescent drink mixture frequently prescribed by his colleague Dennis Embleton. This drink was made by mixing sodium bicarbonate and citric acid with water.

Eno then began selling his own branded version of this fruit salts antacid formula at his pharmacy where it quickly became popular. He later gave free samples to sea merchants and captains who helped introduce Eno's fruit salts to ports around the world, making it an internationally recognized product by the late 1800s.

Key Takeaway: Eno powder was invented in 1852 by British pharmacist James Eno, who marketed the product containing sodium bicarbonate and citric acid as a digestive antacid.

Eno Ingredients

The main active ingredients in Eno fruit salt powder are:

  • Sodium bicarbonate - This base reacts with stomach acid to neutralize it and regulate pH.
  • Citric acid - Helps activate the reaction when sodium bicarbonate is mixed in water. Also adds a light fruity taste.
  • Sodium carbonate - Supports the acid neutralizing capacity.

These simple ingredients work rapidly when dissolved in water to alleviate symptoms of acid reflux and indigestion. The effervescent fizzing reaction helps spread the compounds throughout the stomach to provide fast relief.

Eno powder also contains small amounts of natural fruit extract flavorings and colors in some formulations. Added sweeteners like sodium saccharin may be present as well.

How Eno Powder Works

When you add Eno powder to water, the ingredients quickly begin reacting to form a solution that neutralizes excess acids. Here's a closer look at the process:

  • The sodium bicarbonate (alkaline base) and citric acid combine, causing fizzing due to the release of carbon dioxide gas.
  • This reaction produces a solution high in bicarbonate ions which readily bind to and neutralize hydrochloric acid in the stomach.
  • Excess sodium ions also help block stomach acid production signals.
  • Together, these mechanisms raise pH levels back to an optimal range between 4 to 5, providing rapid relief.

So in essence, Eno powder delivers fast-acting antacid compounds precisely when and where they are needed most to calm acidity on contact.

The easy dissolving action also allows active ingredients to spread rapidly for maximum buffering effects. Most people get relief in as little as 6 seconds, much faster than tablets which can take over a minute to dissolve!

Using Eno Powder

Eno powder comes in small sachets or packets as well as bulk plastic jars or bottles. To use it:

  • Empty one 5g sachet or 5g (1 teaspoon) of loose powder into a glass.
  • Add about 150ml of water and stir briskly until fully dissolved.
  • Drink the fizzy solution immediately for best results. Effects start in seconds and may last up to 3 hours.

This dosage can be repeated every 2-3 hours as needed to control acidity symptoms. For severe reflux, doctors may advise taking 1 dose at night and 1 in the morning.

Always drink plenty of water when taking Eno powder to prevent dehydration and monitor your sodium intake if also on a salt-restricted diet.

Benefits of Choosing Eno Powder

There are several advantages to using Eno fruit salts powder:

  • Fast acid relief due to highly soluble ingredients that diffuse rapidly
  • Convenient dosing with pre-measured powder packets for on-the-go use
  • Pleasant lemon-lime taste unlike bland bicarbonate mixtures
  • Affordable price compared to many other branded antacids
  • Low sugar and calorie option suitable for diabetics and dieters compared to liquid antacids

So if you deal with frequent heartburn and indigestion, keeping a jar or box of Eno powder handy at home or work can help provide prompt relief day or night.

Key Takeaway: To use Eno powder, dissolve one 5g sachet or teaspoon of powder in water to create a fizzy antacid solution. Drink immediately for fast acid neutralization and reflux relief typically starting in 6 seconds.

Active IngredientsSodium bicarbonate, citric acid, sodium carbonate
How it WorksIngredients react when mixed with water to neutralize stomach acid
Onset of ActionRelief starts in as little as 6 seconds
Forms AvailablePowder sachets, jars/bottles
Dosage5g dissolved per dose, repeat every 2-3 hours if needed
BenefitsFast onset, convenient, affordable, pleasant taste

Eno Powder vs. Tablets and Liquids

How does Eno powder compare to other major forms of antacids like tablets and liquids? Here's an overview:

  • Tablets - Require more time to dissolve and act - typically over 1 minute. This delays relief. Chewable tablet varieties have a gritty texture many find unpleasant.
  • Liquids - Act reasonably fast but often have higher sugar content. Syrupy thickness and added flavors may be unappealing for some. Must be refrigerated after opening.
  • Powders - Offer fastest action starting under 10 seconds. Easy to carry packets provide accurate doses. Tend to be more affordable than other forms. Some find the flavor too mild however.

So while no one product is perfect for everyone, Eno powder strikes an excellent balance between convenience, speed, efficacy, and value. The rapid effects in particular make it a great choice for those with severe or sudden onset acid reflux.

Safety and Side Effects

When used correctly, Eno powder has a long history of safe use and is well tolerated without significant side effects for most people. However, some precautions apply:

  • Avoid exceeding the maximum recommended daily dose of 30g. Consuming very high quantities may cause gastrointestinal issues or electrolyte abnormalities.
  • Those on salt-restricted diets should moderate intake as Eno powder contains sodium compounds.
  • Not suitable for children under age 12 unless prescribed by a doctor.

Stop use right away if any signs of hypersensitivity occur such as rash, swelling, or difficulty breathing. Seek emergency care if severe vomiting, nausea, or mineral imbalance symptoms arise.

Overall however, Eno powder carries very minimal risks when taken occasionally as directed to ease acid reflux discomforts. Still check with your pharmacist if you have additional health conditions or take other medications.

Buying Eno Powder

Major pharmacy chains and supermarkets typically stock Eno powder both in store and online. Private online pharmacies also often carry it.

When searching where to buy Eno powder, look for the signature yellow and red Eno packaging. Key product names to look for include:

  • Eno Regular or Original Fruit Salts
  • Eno Cool or Fresh Fruit Salts
  • Eno Lemon Flavor Fruit Salts

Prices for 30 single-serve sachets generally range from $5 to $10 USD while 150g jars cost approximately $10 to $15 USD. Bulk boxes with 200+ doses offer even better value.

Beware of random websites offering very discounted rates which may ship knock-offs or expired goods. For best authenticity and freshness, stick to well known outlets.

Key Takeaway: Check major pharmacies and grocery stores for Eno powder sold under names like Eno Fruit Salts or Eno Lemon. Boxes with 30 doses tend to cost $5 to $10 USD.


Is Eno powder gluten free?

Yes, standard Eno powder products do not contain gluten ingredients so are generally well tolerated by those with celiac disease or on gluten-free diets.

Does Eno powder expire?

Eno typically carries an expiry date about 2 years from the production date if stored properly in a cool, dry location. Discard if the powder ever gets clumpy or odorous.

What's the difference between Eno powder and baking soda?

While both contain sodium bicarbonate, Eno power also includes complementary acids to enhance the neutralizing effects. The formulas result in a more controlled reaction better optimized for gastric acid relief.

Can I take Eno powder while pregnant?

Eno powder is likely safe for short-term use in pregnancy but check with your doctor first. Avoid chronic high intake as it may impact electrolyte balance. Moderation is key.

What can I use if I don't have Eno powder?

For a DIY substitute, mix 1 teaspoon baking soda with juice from half a lemon in water. This mimics Eno's acid-base reaction. Or take calcium carbonate antacid tablets. Both act similarly but take longer to work and taste unpleasant.

Is there a vegan Eno powder?

Yes, the regular Eno fruit salts formula without added flavors is vegan-friendly. Some lemon or orange flavor varieties contain small amounts of animal derivatives though.

Can kids under 12 take Eno powder?

Eno powder is not generally recommended for children below 12 years without medical approval. The high mineral salt content may not be well tolerated by their kidneys or developing bodies.

Is Eno good for nausea?

Yes, by neutralizing stomach acids that can trigger nausea, Eno powder can curb mild nausea quite effectively, especially related to heartburn, indigestion, stomach viruses, or motion sickness.


Eno fruit salt powder is an accessible over-the-counter antacid that leverages a simple robust formula to deliver exceptionally fast relief from various acid reflux and dyspepsia symptoms. Thanks to smart synergies between key active ingredients like sodium bicarbonate and citric acid, Eno starts easing discomforts for most in seconds while also respecting the body's natural balance.

With over 150 years of trusted use for taming tummy troubles, keeping a stash of Eno powder handy promises prompt relief day or night without the palatability issues or delayed effects of some alternatives.

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