What Is Baking Soda? Uses, Benefits and How It Works

Baking soda is one of those everyday ingredients many of us recognise but may not fully understand. Found in kitchen cupboards, cleaning products and natural personal care formulations, baking soda is widely valued for its versatility. From helping cakes rise to neutralising odours in natural deodorants, this simple compound has a surprisingly wide range of uses.

In this guide, we explore what baking soda is, how it works and why it is commonly used in natural skincare and deodorant products.

What Is Baking Soda?

Baking soda, also known as bicarbonate of soda, is the common name for sodium bicarbonate, a naturally occurring alkaline compound. It appears as a fine white powder and has been used for centuries across cooking, cleaning and personal care applications.

The chemical formula for baking soda is NaHCO3, also known as sodium hydrogen carbonate. It forms naturally in mineral deposits and is typically refined into a powder for everyday use.

In the UK, the terms baking soda and bicarbonate of soda are often used interchangeably. Both refer to the same ingredient.

According to the PubChem scientific database overview of sodium bicarbonate, the compound is widely used across pharmaceutical, food and cosmetic applications due to its neutralising and buffering properties.

How Baking Soda Works

Baking soda is classified as an alkaline substance. When it comes into contact with an acid, it produces carbon dioxide gas through a chemical reaction. This process explains why baking soda is commonly used as a leavening agent in baking. The carbon dioxide forms bubbles that help dough and batter expand, creating a lighter texture.

The same neutralising property also explains why baking soda is effective at controlling odours. Body odour is typically caused when bacteria break down sweat into acidic compounds. Because baking soda is alkaline, it helps neutralise these acids, reducing unwanted smells rather than masking them.

Common Uses of Baking Soda

Baking and Food Preparation

Baking soda is widely used in cooking as a leavening agent in recipes such as cakes, pancakes and quick breads. It works quickly, meaning baked goods rise during cooking without requiring fermentation processes like yeast.

Household Cleaning and Deodorising

Baking soda is also valued as a natural cleaning ingredient. Its mildly abrasive texture can help lift stains and grease, while its odour-neutralising properties make it popular for deodorising fridges, bins and carpets.

Personal Care and Cosmetic Uses

Beyond cooking and cleaning, baking soda is commonly used in natural personal care products. It is often included in toothpaste, bath products and natural deodorants due to its ability to neutralise odour-causing bacteria.

If you are interested in switching to plant-based deodorant options, you can explore our natural deodorant balm collection, which uses carefully balanced ingredients to support freshness naturally.

Why Baking Soda Is Used in Natural Deodorant

Baking soda is frequently used in natural deodorants because of its ability to neutralise odour rather than block sweat glands. Traditional antiperspirants often rely on aluminium compounds to prevent sweating, whereas natural deodorants typically focus on controlling odour while allowing the body to sweat naturally.

Baking soda supports this process in several ways:

• Odour neutralisation by balancing acidic sweat by-products
• Moisture control by helping absorb excess wetness
• pH balancing which helps create an environment less favourable for odour-causing bacteria

You can learn more about the wider advantages of plant-based deodorant ingredients in our guide to the benefits of natural deodorant.

Is Baking Soda Safe for Skin?

Baking soda is generally considered safe for many people when used appropriately in skincare formulations. However, because it is alkaline, it may disrupt the skin’s natural pH balance in some individuals, particularly those with sensitive skin.

The skin naturally maintains a slightly acidic protective barrier. Introducing alkaline ingredients like baking soda can sometimes cause irritation or dryness in certain users. Medical guidance highlights that certain skincare ingredients can trigger irritation or disrupt the skin’s protective barrier, as outlined by NHS guidance on contact dermatitis and skin irritation.

If you are new to baking soda-based deodorants, performing a patch test is recommended. Apply a small amount to a discreet area of skin and monitor for irritation before regular use.

For those who find baking soda too strong, many natural deodorants use alternative ingredients such as arrowroot powder or magnesium. We explore this in more detail in our article on whether bicarb in natural deodorant is safe.

Baking Soda vs Baking Powder: What Is the Difference?

Although baking soda and baking powder are often confused, they are not the same.

• Baking soda is pure sodium bicarbonate and requires an acidic ingredient to activate.
• Baking powder contains sodium bicarbonate along with an acid and moisture-absorbing agent, allowing it to activate when liquid is added.

Understanding this distinction is helpful not only in cooking but also when reading ingredient lists in personal care products.

Environmental and Natural Living Appeal

Baking soda is often favoured in natural living routines because it is a multi-purpose ingredient with a relatively simple composition. Many people choose it as an alternative to heavily fragranced or chemically complex household and personal care products.

Research into natural ingredient safety and versatility is ongoing, with organisations such as the Environmental Working Group ingredient database reviewing the safety profile of sodium bicarbonate across cosmetic uses.

Its ability to serve multiple purposes also supports low-waste lifestyles by reducing the need for numerous single-use products.

Final Thoughts: Is Baking Soda a Useful Natural Ingredient?

Baking soda is a versatile and widely used compound with applications spanning cooking, cleaning and personal care. Its ability to neutralise odours, balance pH and support natural formulations makes it a popular ingredient in natural deodorants and skincare products.

While it works well for many people, those with sensitive skin may prefer gentler alternatives or lower concentrations within formulations. Understanding how ingredients function helps you make more informed choices about what you apply to your body.

If you are exploring aluminium-free deodorant options, you can browse our natural deodorant balms, designed to support freshness using carefully selected plant and mineral-based ingredients.