Infraorbital Hollows: Bio-Stimulating Amino Acids vs. Autologous PRP Regeneration

The area beneath the eyes is often one of the first regions where patients notice visible changes associated with facial ageing. Infraorbital hollows — the subtle depressions or shadowing that develop beneath the lower eyelid — are a common concern for patients researching aesthetic options in London and beyond. Many people feel that this area makes them appear tired, older, or less refreshed than they feel, prompting them to explore non-surgical treatment possibilities.

In recent years, two regenerative approaches have attracted considerable interest: bio-stimulating amino acid injectables (such as Jalupro) and autologous platelet-rich plasma (PRP) therapy. Both aim to support the skin's natural renewal processes rather than simply adding volume, yet they work through quite different biological mechanisms.

This article provides a balanced, educational overview of infraorbital hollows as a treatment consideration, explores how each regenerative approach functions, compares their respective profiles, and explains why a personalised professional assessment is an essential starting point for anyone considering either option. For a practical primer before consultation, you can also read how practitioners assess under-eye concerns before treatment.

Infraorbital hollows are depressions beneath the lower eyelid that can contribute to a tired or aged appearance. Bio-stimulating amino acid treatments and autologous PRP regeneration are two evidence-informed regenerative approaches that aim to support collagen production and improve skin quality in this delicate area, though suitability varies considerably between individuals and must be assessed by a qualified practitioner.

Infraorbital hollows develop as a result of several interrelated processes that occur naturally with age. The periorbital region — the skin and soft tissue surrounding the eyes — is anatomically complex and particularly susceptible to the effects of time. As we age, the fat compartments that support the lower eyelid and cheek gradually diminish and descend. Simultaneously, the bone of the orbital rim undergoes a degree of resorption, increasing the apparent depth of the hollow.

The overlying skin in this area is notably thin — often cited as among the thinnest on the face — and contains fewer sebaceous glands, making it more vulnerable to dehydration and loss of structural support. As collagen and elastin fibres degrade over time, the skin loses its ability to maintain a smooth, supported appearance, and the characteristic shadow or depression associated with infraorbital hollows becomes more pronounced.

Genetic factors, lifestyle influences such as sleep quality and hydration, and even certain medical conditions can accelerate or intensify the appearance of infraorbital hollows. It is important for patients to understand that this is a multifactorial concern, and that effective management usually requires a thorough assessment rather than a one-size-fits-all approach.

To understand why regenerative treatments may be considered in this area, it helps to appreciate the underlying biology of periorbital skin ageing.

The dermis — the deeper structural layer of the skin — relies heavily on a matrix of collagen and elastin fibres for its mechanical strength and elasticity. Collagen, primarily type I and type III, provides tensile strength, while elastin allows the skin to return to its original shape after movement. From approximately the mid-twenties onwards, the rate of collagen synthesis begins to slow, while enzymatic degradation of existing collagen continues. The net effect over decades is a progressive thinning and weakening of the dermal matrix.

In the periorbital region, this process is compounded by repetitive micro-movements — blinking occurs approximately 15,000–20,000 times per day — which place ongoing mechanical stress on an already thin and delicate tissue. Ultraviolet radiation further accelerates photoageing by inducing matrix metalloproteinases (MMPs), enzymes that break down collagen and other extracellular matrix proteins.

Regenerative aesthetic treatments, whether bio-stimulating amino acid formulations or autologous PRP, aim to work within this biological context by providing cellular signals or precursor materials that may support the skin's own repair and renewal capacity. Neither approach adds bulk volume in the conventional sense; instead, they seek to encourage intrinsic tissue regeneration.

Bio-stimulating amino acid treatments — of which Jalupro is one commonly used formulation in clinical practice — are injectable preparations containing a combination of free amino acids and, in some formulations, low-molecular-weight hyaluronic acid.

The amino acids included in these preparations — typically glycine, L-proline, L-leucine, and L-lysine — are the fundamental building blocks that fibroblast cells require to synthesise new collagen. When delivered into the dermis, they are designed to create a local reservoir of these precursor molecules, theoretically enhancing the fibroblast's capacity to produce new collagen and supporting the extracellular matrix.

Jalupro and similar products are classified as medical devices in the United Kingdom and are intended for use by trained medical professionals. They are typically administered via a series of micro-injections into the superficial to mid-dermis. For infraorbital hollows specifically, the technique requires considerable precision given the delicacy and thinness of the periorbital skin, the proximity of important anatomical structures, and the significant risk of bruising in this vascular area.

Treatment protocols vary, but a course of sessions spaced several weeks apart is typically recommended before assessing outcomes. Results are gradual rather than immediate, reflecting the biological timeline of collagen remodelling.

Autologous platelet-rich plasma (PRP) therapy is a regenerative procedure that uses a concentration of the patient's own blood-derived platelets to deliver growth factors into targeted tissue.

The process begins with a small blood draw, typically 10–20 ml, from the patient's arm. The blood is then processed in a centrifuge to separate its components, isolating a fraction rich in platelets. Platelets are small, anucleate blood cells best known for their role in clotting, but they also contain alpha granules packed with numerous growth factors — including platelet-derived growth factor (PDGF), transforming growth factor-beta (TGF-β), vascular endothelial growth factor (VEGF), and epidermal growth factor (EGF).

When injected into the skin, these growth factors interact with local cell receptors to stimulate fibroblast proliferation, encourage angiogenesis (the formation of new blood vessels), and promote the synthesis of collagen and other extracellular matrix components. Because the material is entirely derived from the patient's own blood, the risk of allergic or immunological reaction is considered to be very low, though it does not eliminate all procedural risks.

In the periorbital area, PRP may be administered via fine needle injections or, in some protocols, in combination with microneedling to facilitate dermal absorption. As with amino acid bio-stimulators, results develop gradually over weeks to months as the biological response progresses.

Understanding the distinctions between bio-stimulating amino acid treatments and autologous PRP regeneration can help patients engage more meaningfully with their practitioner during a consultation.

It is important to note that this comparison is for educational purposes only. Individual suitability for either treatment depends on a range of personal health, anatomical, and skin-quality factors that can only be properly evaluated during a professional consultation.

Patients who notice persistent shadowing, hollowing, or fine-line formation in the under-eye area may wish to seek a professional opinion, not necessarily to pursue treatment, but to understand the nature of their concern and what options may or may not be appropriate for them.

Professional assessment may be particularly helpful for:

• Individuals who have noticed a gradual deepening of the infraorbital hollow over several years
• Patients concerned about the quality and texture of the skin beneath the eyes
• Those who have tried topical skincare without achieving their desired improvement in skin quality
• Patients who have researched regenerative aesthetic options and wish to understand their suitability
• Individuals who have undergone previous periorbital treatments and wish to explore adjunctive or alternative approaches
• Patients in good general health who are keen to understand evidence-informed, minimally invasive options

It is equally important to note that many people choose not to pursue any aesthetic treatment after consultation, having gained a clearer understanding of normal facial ageing and realistic expectations. A thorough assessment helps ensure that any decision — including the decision not to treat — is made with accurate information.

Both bio-stimulating amino acid treatments and autologous PRP regeneration offer a regenerative rather than volumising approach, which many patients find appealing when considering the delicate periorbital area. Potential benefits that may be discussed during a consultation include gradual improvement in skin quality, enhanced hydration within the dermis, and modest improvement in the appearance of fine lines over a course of treatment.

However, patients should approach these treatments with realistic expectations:

• Results are gradual. Neither approach produces immediate visible change. Outcomes typically develop over six to twelve weeks following a course of treatment.
• Individual variation is significant. Responses vary depending on age, skin condition, lifestyle factors, and the degree of tissue change present.
• These are not volume-replacement treatments. For more pronounced infraorbital hollows where fat atrophy or significant volume loss is a primary contributing factor, regenerative approaches may be insufficient as standalone treatments, and a practitioner may discuss complementary options such as hyaluronic acid dermal fillers.
• Maintenance is likely required. The collagen stimulation initiated by these treatments is not permanent; ongoing sessions may be needed to sustain any observed improvement.
• Risks exist. The infraorbital area is vascular and anatomically sensitive. Potential adverse effects include bruising, swelling, tenderness, and, in less common circumstances, more significant complications. All risks should be discussed in detail during a pre-treatment consultation.

Following any aesthetic treatment in the periorbital area, practitioners typically provide specific aftercare guidance tailored to the procedure performed. General principles that are frequently recommended include:

Sun protection: Daily use of a broad-spectrum SPF is considered fundamental to maintaining skin health and protecting any treatment investment. Ultraviolet radiation drives collagen degradation and can undermine regenerative efforts.

Gentle cleansing: In the days following treatment, the periorbital area should be treated gently. Vigorous rubbing or use of active exfoliants should generally be avoided until the skin has settled.

Avoiding heat: Saunas, steam rooms, and intense heat exposure are typically advised against in the immediate post-treatment period.

Hydration: Maintaining good systemic hydration supports overall skin health and can complement the effects of any regenerative treatment.

Topical skincare: A practitioner may recommend specific topical actives — such as retinoids, peptides, or vitamin C — as part of an ongoing skin health strategy. These should be reintroduced in accordance with individual guidance rather than assumed to be universally appropriate immediately after treatment.

For those researching broader skin health and rejuvenation approaches, information about skin booster treatments at Pantaleo Clinic is available on our website for educational reference.

Lifestyle factors including sleep quality, nutritional status, and avoiding smoking are well-recognised as influential on skin ageing and recovery capacity, and are relevant considerations regardless of whether a patient pursues aesthetic treatment.

• Infraorbital hollows develop through a combination of soft tissue descent, fat atrophy, bony resorption, and dermal collagen loss — making assessment complex and highly individual.
• Bio-stimulating amino acid treatments work by delivering collagen precursors to dermal fibroblasts, while autologous PRP delivers growth factors from the patient's own blood — both aim to support tissue regeneration rather than add volume.
• Results from both approaches develop gradually over weeks to months; neither provides immediate visible change, and outcomes vary between individuals.
• Suitability is not universal. Individual anatomy, skin condition, general health, and treatment history all influence whether a regenerative approach may be appropriate.
• Professional assessment is essential before pursuing any periorbital aesthetic treatment, given the anatomical complexity and sensitivity of this area.
• Realistic expectations and ongoing maintenance are important considerations; neither treatment should be viewed as a permanent or guaranteed solution.

How long does it take to see results from bio-stimulating amino acid treatments in the under-eye area?

Results from bio-stimulating amino acid treatments such as Jalupro develop gradually, as the mechanism involves supporting the skin's own collagen synthesis process. Most patients begin to notice a subtle improvement in skin quality, hydration, and fine-line appearance approximately four to six weeks after the first session. Optimal results are typically observed after a course of two to four treatments. Individual response varies depending on age, skin condition, and lifestyle, and not all patients experience the same degree of improvement.

Is PRP safe to use in the delicate under-eye area?

Autologous PRP uses the patient's own blood-derived platelets, which significantly reduces the risk of allergic or immunological reactions. However, the infraorbital area is anatomically sensitive and vascular, meaning that bruising, swelling, and tenderness are common following treatment. More significant complications, though less common, are possible. Safety is closely related to the experience and training of the practitioner performing the procedure. Suitability — including assessment of any blood conditions or medications that may affect platelet function — must be evaluated individually during a consultation.

Can regenerative treatments fully correct infraorbital hollows?

It is important to have realistic expectations regarding regenerative treatments in this area. Bio-stimulating amino acids and PRP may improve skin quality, fine lines, and superficial shadowing, but they are not volume-replacement treatments. For patients with more pronounced hollowing associated with significant fat atrophy or bony changes, regenerative approaches alone may provide limited visible correction. A practitioner may discuss whether additional or complementary approaches are relevant during a thorough individual assessment.

How many sessions are typically needed, and how often should they be repeated?

Treatment protocols vary depending on the specific product, technique, and individual response. As a general guide, bio-stimulating amino acid courses often involve two to four sessions spaced three to four weeks apart. PRP protocols commonly involve three sessions spaced four to six weeks apart. Maintenance sessions at intervals of several months to a year may be recommended to sustain results. All protocols should be personalised to the individual following a clinical assessment.

Are there any patients who are not suitable for PRP or amino acid bio-stimulators?

Yes. There are certain medical conditions, medications, and circumstances in which these treatments may not be appropriate. For PRP, conditions affecting platelet function, blood disorders, or the use of anticoagulant medications may affect candidacy. For amino acid formulations, known hypersensitivity to any ingredient is relevant. Pregnancy and breastfeeding are typically contraindications for elective aesthetic procedures. A comprehensive health history review during a professional consultation is the appropriate means of determining suitability on an individual basis.

How do I choose between bio-stimulating amino acids and PRP for my under-eye concerns?

There is no universal answer to this question, and the choice between these approaches should not be made in isolation. A qualified aesthetic practitioner will assess your specific concerns, skin condition, anatomical characteristics, medical history, and treatment goals before discussing which option — or combination of approaches — may be most appropriate for you. Reading educational content such as this article can help you arrive at a consultation with a clearer understanding of the options, enabling a more informed discussion with your practitioner.

Infraorbital hollows are a nuanced aesthetic concern that reflects the complex, multifactorial nature of periorbital ageing. Bio-stimulating amino acid treatments and autologous PRP regeneration represent two evidence-informed, minimally invasive approaches that aim to support the skin's intrinsic renewal capacity rather than adding extrinsic volume. Both have an evolving evidence base, distinct mechanisms of action, and comparable gradual timelines for visible change.

For patients researching these options, the most valuable step is not choosing between them online, but rather engaging with a qualified medical aesthetic practitioner who can assess individual anatomy, skin condition, and overall suitability. The periorbital area demands both technical skill and clinical judgement, and the appropriateness of any treatment — including the decision not to treat — is best determined through a thorough and personalised professional assessment.

For those wishing to begin that process, booking a consultation at Pantaleo Clinic is a sensible and informed starting point. During your consultation, a full personalised treatment plan including associated costs will be discussed.

Treatment suitability, risks, and expected outcomes should always be assessed individually during a professional consultation.