When skin becomes dry and uncomfortable during cancer treatment, one of the first things many oncology nurses and dermatologists recommend is finding a good hydrating product. Hyaluronic acid is one of the most frequently mentioned, and for good reason. It is highly effective, exceptionally well tolerated, and very unlikely to cause irritation, even on skin that has become extremely reactive during treatment.
What Is It?
How Hyaluronic Acid Works in Skin
Hyaluronic acid (often abbreviated to HA) is a naturally occurring molecule found throughout the body, including in the joints, eyes, and skin. In the skin, it acts as a humectant, meaning it draws water from its surroundings and holds it within the upper layers of the skin, helping to keep the skin hydrated, plump, and comfortable.
A single HA molecule can hold up to 1,000 times its own weight in water. In skincare products, it is available in different molecular sizes, and this affects how it works:
- High molecular weight HA sits on the skin’s surface, forming a thin film that reduces moisture evaporation and temporarily improves the skin’s appearance and feel.
- Low molecular weight HA is smaller and able to penetrate into the upper layers of the stratum corneum, delivering hydration deeper within the skin.
- Sodium hyaluronate, the salt form of HA, is more stable and penetrates slightly more readily than standard HA.
Products that contain multiple molecular weights of HA deliver both surface comfort and deeper hydration simultaneously, which tends to produce the most noticeable results.
Why It Helps During Treatment
Hyaluronic Acid During Cancer Treatment
Both chemotherapy and radiation therapy interfere with the skin’s natural ability to produce and retain moisture. Hyaluronic acid is particularly well suited to this situation for several reasons:
- It is biocompatible, meaning it closely resembles a substance already found in the body, and is very rarely associated with adverse reactions, even on highly sensitive or reactive skin.
- Quality formulations contain no fragrance, essential oils, or common contact sensitisers, making it one of the cleanest options available for skin that has become reactive during treatment.
- It provides rapid relief from the tightness and discomfort of treatment-related dryness, often noticeable from the first application.
How to use it?
How to Use Hyaluronic Acid Effectively
- Apply to slightly damp skin immediately after washing or after misting the skin with water. HA draws moisture from its immediate environment, so applying it to damp skin means it draws from the surface water first.
- Always follow with a moisturiser or cream that contains emollients and occlusives. Hyaluronic acid draws moisture in; without a layer to seal it, that moisture will evaporate. Think of HA as filling the reservoir and the moisturiser as putting the lid on.
- Look for formulations that include both hyaluronic acid and sodium hyaluronate, or that specify multiple molecular weights, for the most comprehensive hydrating effect.
- Use morning and evening as part of your regular routine.
- If applying products to skin in a radiation treatment field, check with your radiotherapy team about timing before each session.
Many products developed for oncology skin care, including those in the CanScience range, are formulated to deliver effective hydration while remaining gentle enough for skin compromised by treatment.
Suggested Routine
Suggested CanScience Routine
- Morning: Cleanse gently. While skin is still slightly damp, apply a hyaluronic acid serum or HA-containing moisturiser. Seal with a barrier cream. Apply mineral SPF 30 or higher.
- Evening: Cleanse gently. Apply HA serum or treatment to damp skin. Follow with a ceramide-rich moisturiser or repair cream.
Hyaluronic Acid for Compromised Skin Frequently Asked Questions
Is hyaluronic acid safe during radiation therapy?
Hyaluronic acid is generally considered one of the safest topical ingredients for use during radiation therapy, largely because of its biocompatibility and very low irritant potential. Always confirm with your radiotherapy team before applying anything to the treatment field, particularly before each session.
Can I use hyaluronic acid if my skin is broken or blistered?
It is best to avoid applying any topical product to broken, blistered, or open skin without guidance from your clinical team. Report any skin breakdown during treatment to your oncology nurse or doctor promptly.
What is the difference between hyaluronic acid and sodium hyaluronate?
Sodium hyaluronate is the salt form of hyaluronic acid. It is more stable, slightly more water-soluble, and penetrates the skin a little more easily. Both are effective hydrators and many well-formulated products include both forms.
Does hyaluronic acid help with dry skin caused by chemotherapy?
Yes, it can be very helpful. For the best results, use it as part of a complete routine that also addresses barrier repair, specifically products containing ceramides and emollients, as chemotherapy-related skin changes typically affect both hydration and structural barrier integrity together.
Key Takeaways
- Hyaluronic acid is a humectant that draws water into the skin and helps it stay hydrated.
- It is one of the best-tolerated ingredients for reactive or treatment-compromised skin.
- Always apply to slightly damp skin and seal with a moisturiser or cream on top.
- It works best as part of a complete routine that also addresses barrier repair.
- Confirm with your radiotherapy team before applying products to the treatment field.
Medical Disclaimer: This article is for educational purposes only and does not constitute medical advice. It is not a substitute for professional medical guidance and is not intended to diagnose, treat, cure, or prevent any condition. Always consult your oncologist, dermatologist, or healthcare team before making changes to your skincare routine, particularly during cancer treatment.
