The Science Behind Seventy Hyal: Understanding High Molecular Weight Hyaluronic Acid
Hyaluronic acid has long been a cornerstone ingredient in aesthetic medicine, but not all hyaluronic acid behaves the same way once it is introduced into the skin. Molecular weight plays a significant role in determining how a formulation is thought to interact with the dermis, and this is the foundation on which Seventy Hyal, Fox Pharmacy’s high molecular weight hyaluronic acid skin booster line, has been developed. This article looks at the underlying science to help practitioners better understand the category and how it may fit into a wider treatment strategy.
What Makes Hyaluronic Acid “High Molecular Weight”?
Hyaluronic acid molecules can vary enormously in size, and this is typically measured in kilodaltons (kDa). Broadly speaking, low molecular weight hyaluronic acid consists of smaller fragments that can penetrate more deeply into tissue, while high molecular weight (HMW) hyaluronic acid is made up of larger molecular chains. These larger molecules are generally understood to sit closer to the skin’s surface layers and form a more substantial hydration reservoir. Research into HA has suggested that molecular size can influence how the substance is metabolised and how it interacts with skin cells, which is why formulators consider molecular weight carefully when developing skin booster products.
How HMW HA Behaves in the Skin
Because of their larger structure, HMW hyaluronic acid molecules are thought to form a more stable, film-like layer of hydration within the tissue, which may support the skin’s barrier function and overall moisture retention. Some studies suggest that HMW HA can also have a soothing effect on the skin and may contribute to a smoother, more even-looking surface over time. It is generally considered to break down more gradually than lower molecular weight variants, which is one reason it is often positioned as a longer-acting hydration option, although the exact behaviour will depend on the specific formulation and how it has been cross-linked or stabilised, as well as individual patient factors.
Seventy Hyal in Practice
Seventy Hyal has been formulated to reflect this HMW approach, offering practitioners a hyaluronic acid skin booster designed to support hydration and skin quality as part of a considered treatment plan. As with any injectable, it should be used within the scope of a practitioner’s training and in line with the product’s intended use. It is not designed to replace volumising fillers or to address structural concerns, but rather to complement a broader skin health programme focused on hydration, radiance, and texture.
Choosing the Right HA for Your Patients
Understanding the distinction between molecular weights allows practitioners to have more informed conversations with patients and to select products that align with specific skin goals. A patient primarily concerned with surface hydration and skin quality may be a good candidate for a HMW HA approach, while other patients may benefit from a combination of molecular weights across a treatment course. As always, a thorough consultation, medical history review, and realistic discussion of expected outcomes should precede any treatment decision, and it should be made clear that results vary between individuals.
If you would like more detail on the formulation and positioning of Seventy Hyal, the Fox Pharmacy team is available to discuss product specifications and support your clinic in offering this treatment responsibly. Feel free to browse the range or contact us directly with any questions.