All the Benefits of Glycerin for Skin & Hair

Glycerin, also known as glycerol, is probably one of the least glamorous cosmetic ingredients, but it is one of the most-used compounds in skincare. This multi-purpose, foundational ingredient has thoroughly earned its widespread use with a long history of safe and effective use in beauty. These days you can find it in almost everything, from high-end luxury skincare to budget-friendly drugstore products. In this article we explore what exactly glycerin is, its skin and hair benefits and how to use it in your skincare routine. We also compare it against natural and synthetic glycerin alternatives.

What is Glycerin & How Does it Work?

Glycerin is a natural humectant derived from both plant and animal fats. It has a unique ability to attract and retain moisture. Glycerin also has a long and rich history in beauty and skincare. It was discovered in 1779 by Swedish chemist Carl Wilhelm Scheele, as a by-product of soap making. By the mid-19th century, glycerin had gained recognition for its moisturising properties. It began appearing in a range of cosmetics and personal care products. Throughout the 20th century, it became a staple in the beauty industry thanks to its versatility and efficacy. This is mainly down to its deep hydrating properties. These make it an essential component for boosting skin moisture, combating dryness and maintaining a radiant complexion.

The secret to glycerin’s effectiveness lies in its molecular structure. Glycerin has three hydroxyl groups that attract and bind water molecules. This quality allows it to draw moisture from both the environment and the deeper layers of the skin. It then moves this moisture to the stratum corneum, the outermost layer of skin. By keeping the skin hydrated, it supports a healthy skin barrier. This is essential for protecting against environmental stressors, allergens and pollutants. Glycerin is also well-tolerated by most skin types, including those with sensitive skin.

There are several ways to produce glycerin. The most common methods are saponification and hydrolysis of plant or animal fats and oils. In the soap-making process, fats (mainly animal) are mixed with an alkali, which produces soap and forms it as a by-product. Another method is transesterification, where plant oils are reacted with alcohol to yield glycerin and biodiesel. Most of the glycerin in skincare today is derived from vegetable oils like coconut, palm or soy.

Benefits of Glycerin for Skin & Hair

Glycerin offers numerous benefits for the skin and hair. Its main value in skincare is providing long-lasting hydration without a greasy finish. Here are some of the key benefits of glycerin for skin:

• Deep hydration: glycerin is a powerful humectant that draws moisture from the environment and locks it into your skin. If you struggle with dry or flaky skin, it helps restore moisture balance. This leaves your skin softer and plumper.
• Skin barrier support: another benefit is that it strengthens the skin’s natural barrier to shield it from environmental aggressors and irritants. This is particularly helpful for those with sensitive skin or conditions like eczema.
• Improved skin texture: glycerin’s ability to retain moisture makes the skin feel smoother and more supple. Consistent use of these products can help reduce rough patches and promote a more even skin tone.
• Healing and soothing: last but not least, glycerin also has soothing properties. It can be helpful for calming minor irritations or inflammation. So glycerin-based skincare can help ease redness and itching and soothe cracked skin.

Glycerin also offers a number of notable benefits for hair health. Here are the key benefits of glycerin haircare products:

• Hydration for dry hair: it locks moisture into the hair strands. This makes it helpful for dry or brittle hair.
• Frizz control: by retaining moisture, it helps manage frizz. It can make hair smoother and easier to style.
• Scalp health: a healthy scalp is key to beautiful hair. Glycerin soothes dryness and helps maintain scalp balance, which reduces itchiness and dandruff.

How to Use Glycerin in Your Skincare Routine

Glycerin is a versatile ingredient that can easily fit into different skincare routines, regardless of your skin type. Whether you are dealing with dry patches, looking to boost hydration or want a gentle solution for sensitive skin, it is an excellent choice. Here are our top tips for the best way to use glycerin in your skincare routine:

• Choose the right glycerin product for your skin type: if you have oily or combination skin, opt for lighter formulations like toners, essences or gel-based moisturisers. These will hydrate your skin without leaving a heavy or greasy finish. Those with dry skin will benefit most from richer glycerin-based balms or creamy moisturisers, which deeply nourish the skin and lock in moisture for longer to reduce dryness and flakiness.
• Layer it with other ingredients: glycerin pairs well with other hydrating and barrier-strengthening ingredients. Try pairing it with hyaluronic acid for extra hydration, or layer it with ceramides to strengthen the skin barrier. Apply glycerin-based serums or toners before your thicker moisturisers to lock in hydration.
• Spot treatment: if you have specific areas prone to dryness, such as around the nose, elbows or knees, apply a glycerin-based cream directly to these spots. Its ability to attract and retain moisture can help soften stubborn dry patches and restore skin elasticity.
• Use glycerin with occlusives: this helps prevent glycerin from pulling moisture away from the deeper layers of your skin in low-humidity conditions. After applying it, follow with an occlusive product such as a facial oil or a rich cream. This seals in the hydration and boosts glycerin’s effectiveness.

How to Use Glycerin in Haircare

Whether you are dealing with dryness, frizz or a flaky scalp, glycerin can help improve the health and appearance of your hair. Here are our top tips for the best ways to start using glycerin in your haircare routine:

• Leave-in conditioners and hair masks: look for leave-in conditioners or hair masks that contain glycerin. These are great for keeping hair hydrated between washes and taming frizz. Apply a glycerin-rich leave-in conditioner to damp hair to maintain hydration through the day, especially in dry or humid climates. You can also give your regular conditioner a hydrating boost by adding a few drops of pure glycerin before applying it.
• Styling products: glycerin is great for managing frizz, especially in humid weather where moisture imbalance often leads to puffiness and flyaways. Apply a glycerin-based styling product or serum to the mid-lengths and ends of your hair to tame frizz and add shine.
• Scalp treatment: if you experience scalp dryness or flakiness, a glycerin scalp treatment can help. Mix a few drops of it with water or aloe vera gel and massage it gently into your scalp before rinsing. Glycerin helps restore moisture balance and soothes irritation, supporting a healthier scalp environment.

Safety & Risks

Although glycerin is generally safe for most people, like anything in life nothing is risk-free. These are some of the potential risks and side effects to keep in mind:

• Sensitivity or allergy: though rare, some people may experience skin sensitivity or an allergic reaction to glycerin. Symptoms can include redness, itching or a burning sensation. If you experience these, stop use and seek medical help.
• Clogged pores: glycerin in heavy formulations may contribute to clogged pores for those with acne-prone skin. Opt for lightweight glycerin products if you have oily skin or acne.
• Dry skin: in low-humidity environments, it may draw moisture from the deeper layers of the skin, leading to dryness. To avoid this, use glycerin alongside occlusives to lock in moisture.

Additionally, anyone with certain skin conditions, such as rosacea or eczema, should take more care before using glycerin-rich products. This is because they may aggravate symptoms. If you have sensitive skin or underlying skin conditions, check with your medical provider before adding glycerin to your routine.

Alternatives to Glycerin in Skincare

Although glycerin is a fantastic, cheap and widely available humectant, it may not be for everyone. Some people dislike the feel of it or have not tolerated it well in the past. Others may be put off by environmental concerns related to the use of palm oil in glycerin production. This can contribute to deforestation and habitat loss. Whatever the reason, if it does not seem like the right fit for your skin and hair, there are several alternatives. The main ones include:

• Hyaluronic acid: this naturally occurring molecule can hold up to 1000 times its weight in water and plays a key role in maintaining skin hydration. It provides intense hydration without feeling sticky and is excellent for plumping the skin and reducing fine lines. However, it is often more expensive than glycerin. It may also be less effective in low humidity, where it needs ambient moisture to work well.
• Aloe vera: this plant-derived ingredient is known for its anti-inflammatory and soothing properties, which make it ideal for sensitive, sunburned or irritated skin. Aloe vera is not as strong a humectant as glycerin, so it often needs pairing with other hydrating ingredients for deeper moisture.
• Sodium PCA: a naturally occurring humectant found in the skin, sodium PCA is effective at moisture retention. It is non-greasy and lightweight, which makes it a great alternative to glycerin for oily or combination skin. However, it may be less easy to find in over-the-counter products, and the effects may not last as long in very dry environments.
• Propylene glycol: this synthetic humectant helps draw water into the skin and improves product texture. Propylene glycol is less sticky and absorbs more quickly than glycerin, so it is a great alternative for those who dislike heavier textures. The downside is that it may cause irritation for people with sensitive skin.
• Honey or propolis: honey and propolis are natural humectants with antibacterial and healing properties, and they have been used for centuries for their moisturising benefits. They are ideal for irritated or acne-prone skin. However, honey is sticky and propolis is waxy. They are also not vegan and are expensive, which makes them a less useful alternative to glycerin.

Glycerin is an unsung skincare ingredient that offers numerous benefits for both skin and hair. Its ability to attract and retain moisture makes it a must-have for anyone struggling with dryness, irritation or frizz. Because it is so widely available, it is relatively easy to add glycerin to your skin and hair routines. The payoff is a healthier, more radiant complexion and smoother, glossier hair. For those who are not keen on glycerin, there are also a number of good alternatives that offer similar benefits.

At City Skin Clinic, we are passionate about personalised skincare. Through our online clinic, our doctors provide safe and effective treatments containing ingredients like tretinoin and hydroquinone where appropriate. We treat skin conditions like acne, hyperpigmentation, melasma and skin ageing. To start your personalised plan, book a virtual video consultation or use our online consultation form. The journey towards great skin and hair starts here.

This article is intended for general informational purposes only and is not a substitute for medical advice, diagnosis or treatment. Always consult a qualified medical professional with any concerns about your skin, hair or treatment options.