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Aesthetics · Skin Health · Functional Nutrition · Women's Health

What Your Aesthetics Clinic
Isn't Telling You

Microneedling stimulates collagen production. Botox relaxes the muscles that create lines. Laser resurfacing remodels skin texture. These are real mechanisms producing real results. But the biological foundation on which they're performed — your nutritional status, your hormonal environment, your inflammatory load — determines how well they work, how long the results last, and how well you recover. Nobody in the aesthetics clinic is checking that before they book you in.

Stephen DuncanFDN-P MSc BSc · 37 years clinical practice
Reading time13 minutes
SeriesWhat Your Aesthetics Clinic Isn't Telling You · Part 1

I have been asking the same question for years, every time a client mentions an aesthetic treatment they're having or considering.

The question is not whether the treatment works. Most of the well-established ones do, in the right hands, for the right indication. The question is: what is the biological foundation on which this treatment is being performed — and is anyone paying attention to it?

The answer, almost universally, is no.

The aesthetics consultation covers treatment options, contraindications, aftercare, and pricing. It does not cover ferritin levels, zinc status, vitamin C sufficiency, collagen precursor availability, chronic inflammation markers, hormonal environment, or gut barrier integrity. These are not fringe concerns. They are the nutritional and biochemical determinants of how well skin heals, how efficiently it produces collagen, how effectively it responds to the controlled wound that most aesthetic procedures deliberately create.

The procedures and the biology are not separate conversations. They are the same conversation — and only half of it is currently being had.

How skin ages — and why nutrition is central to it

Skin ageing is driven by two overlapping processes: intrinsic ageing (the biological programme driven by genetics, cellular senescence, and cumulative oxidative damage) and extrinsic ageing (the environmental inputs — UV radiation, pollution, toxic burden, smoking, alcohol, dietary patterns, chronic stress — that accelerate the intrinsic process).

The common final pathway in both is collagen. Collagen is the structural protein that gives skin its tensile strength, resilience, and volume. The dermis — the middle layer of skin — is approximately 70% collagen by dry weight. After the age of approximately 25, collagen production declines at roughly 1% per year. The rate of that decline is not fixed — it is substantially modified by the biological environment in which collagen synthesis is trying to occur.

Collagen synthesis is an enzymatic process requiring specific nutritional cofactors. It is upregulated by certain hormones and suppressed by others. It is impaired by chronic inflammation, by oxidative stress, by inadequate protein intake, by specific nutrient deficiencies that are extraordinarily common in the women who most commonly seek aesthetic treatments.

Understanding what collagen synthesis actually requires — and what impairs it — changes the entire conversation about aesthetic procedures, because the majority of them work by stimulating collagen production. They are, essentially, controlled provocations of the body's own repair mechanisms. The quality of the response to that provocation depends on the quality of the biological machinery doing the responding.

The collagen synthesis pathway — what it actually needs

Collagen Synthesis — Essential Nutritional Cofactors
Vitamin C
Rate-limiting cofactor for prolyl and lysyl hydroxylase — the enzymes that hydroxylate proline and lysine residues in the collagen triple helix. Without adequate vitamin C, collagen cannot form its characteristic triple helix structure and is functionally inadequate. The classic presentation of vitamin C deficiency (scurvy) is collagen failure — bleeding gums, poor wound healing, skin fragility. Subclinical insufficiency produces subclinical versions of the same problems.
Zinc
Essential cofactor for collagenase enzymes that remodel existing collagen, and for the matrix metalloproteinases involved in wound healing and tissue remodelling. Zinc deficiency impairs both collagen synthesis and the remodelling phase of wound healing. It is extremely common — particularly in women eating low red meat diets, those with gut absorption issues, and those under chronic stress (which depletes zinc via urinary excretion).
Copper
Required for lysyl oxidase — the enzyme that cross-links collagen and elastin fibres to give them tensile strength. Without adequate copper-dependent cross-linking, collagen fibres are structurally weak regardless of how much is produced. Copper deficiency is less common than zinc deficiency but the two are metabolically antagonistic — high-dose zinc supplementation without adequate copper can induce functional copper deficiency.
Glycine & Proline
The dominant amino acids in collagen (glycine constitutes approximately one third of all collagen amino acid residues). Collagen synthesis is therefore directly dependent on dietary protein adequacy and specifically on glycine and proline availability. Many women eat insufficient protein — particularly those following plant-based or calorie-restricted diets — and glycine is conditionally essential under high collagen demand.
Iron
Required as a cofactor for the same prolyl hydroxylase enzymes as vitamin C. Iron deficiency — which is extremely common in premenopausal women, with ferritin frequently low-normal rather than optimal — impairs collagen hydroxylation independently of vitamin C status. A woman with ferritin of 14 µg/L is not in an optimal collagen-synthesising state, regardless of what her vitamin C intake looks like.
Silicon
Involved in collagen cross-linking and glycosaminoglycan synthesis — the compounds that give the extracellular matrix its hydration and volume. Often overlooked in nutritional assessment of skin health. Found in whole grains, oats, and some mineral waters.
Vitamin A
Regulates fibroblast activity — the cells responsible for collagen production. Retinoic acid (the active form of vitamin A) is the basis of topical retinol treatments. Adequate dietary vitamin A (from animal sources as preformed retinol, or as beta-carotene from plants — with conversion efficiency that varies significantly between individuals) supports the same fibroblast activation from the inside.

The procedures — mechanism, nutritional dependency, and what actually determines results

Microneedling
Mechanism is real · Results are variable
Microneedling creates controlled micro-injuries in the dermis using fine needles — typically 0.5mm to 2.5mm in depth depending on the indication. This triggers the wound healing cascade: haemostasis, inflammation, proliferation (during which fibroblasts produce new collagen and elastin), and remodelling. The result, over a series of treatments, is increased collagen density, improved skin texture, reduced fine lines, and improved scar appearance.
Nutritional dependency
The proliferation phase — where the collagen is actually made — requires every cofactor in the table above. A woman who is zinc deficient, vitamin C insufficient, and low in ferritin will mount a blunted fibroblast response to the microneedling stimulus. The wound healing cascade will still occur, but the collagen output of that cascade will be reduced. She may get some benefit. She will not get the result she would get if the nutritional foundation were optimal. The aesthetics clinic will attribute this to skin type or age. The more accurate explanation is nutritional status.
Botulinum Toxin (Botox and variants)
Mechanism is well established · Duration varies individually
Botulinum toxin inhibits the release of acetylcholine at the neuromuscular junction — temporarily paralysing the injected muscle. The clinical effect is relaxation of dynamic lines (lines produced by muscle movement) and prevention of their deepening. Results typically last 3–4 months, after which the neuromuscular junction regenerates and muscle function returns. It does not address static lines (present at rest) or skin quality — it addresses the muscular component of facial ageing.
The stress-facial ageing connection
The muscle tension that neurotoxins address is not random. It reflects habitual patterns of facial expression — and those patterns are substantially driven by the sympathetic nervous system tone that chronic stress produces. Women with chronically elevated cortisol, dysregulated HPA axis, and high allostatic load develop characteristic facial tension patterns that accelerate dynamic line formation. They also tend to need more frequent neurotoxin treatment because the muscle activity driving the lines is more persistent. Addressing the underlying stress physiology — cortisol pattern, HPA axis regulation, sleep quality — doesn't replace neurotoxin treatment for existing lines, but it changes the rate at which new ones form and potentially extends the duration of treatment effect.
Laser Resurfacing & Light Therapies
Significant evidence base · Recovery is nutritionally dependent
Ablative laser resurfacing removes the epidermis and portions of the dermis, triggering substantial wound healing and collagen remodelling. Non-ablative lasers and IPL (intense pulsed light) work at lower intensities, stimulating collagen production without destroying surface tissue. Fractional lasers (ablative and non-ablative) treat a fraction of the skin surface, leaving surrounding tissue intact to accelerate healing. Results across all modalities include improved skin texture, tone, pigmentation, and collagen density.
Nutritional dependency
Post-laser recovery is an active wound healing process. The speed and quality of that healing — and the degree of collagen remodelling produced — is directly dependent on nutritional status. Vitamin C, zinc, protein adequacy, and inflammatory load all influence recovery trajectory. Women with significant systemic inflammation (elevated CRP, active gut dysbiosis, high toxic burden) tend to have extended post-procedure inflammation and slower healing. Women with optimal nutritional status and low inflammatory load heal faster, have less post-procedure erythema, and often achieve better collagen outcomes from the same procedure intensity.
Dermal Fillers
Volume replacement · Longevity is individually variable
Hyaluronic acid fillers restore volume lost through fat compartment atrophy and collagen depletion — the two primary drivers of facial hollowing with age. They work by hydrophilic attraction (hyaluronic acid binds water molecules, creating volume) and by stimulating some new collagen production at the injection site. Results typically last 6–18 months depending on product, location, and individual metabolism of the filler.
Why results vary
Filler longevity varies significantly between individuals. One underappreciated factor is systemic inflammation — elevated inflammatory cytokines accelerate hyaluronidase activity (the enzyme that degrades hyaluronic acid), potentially reducing filler duration. Women with high inflammatory load may metabolise filler faster than those with low inflammation. Additionally, the volume loss that fillers address is itself partly driven by hormonal changes — oestrogen influences facial fat distribution and skin hydration via hyaluronic acid production. Optimising oestrogen and progesterone balance may slow the rate at which volume replacement is needed.
Chemical Peels
Evidence-based · Depth determines recovery requirements
Chemical peels use acidic solutions (glycolic acid, salicylic acid, TCA, phenol) to remove outer skin layers and stimulate renewal. Superficial peels address texture and pigmentation with minimal downtime. Medium and deep peels produce more significant results but require substantial recovery periods and carry higher risk profiles. The mechanism, like microneedling and laser, involves controlled injury followed by collagen-stimulating wound healing response.
Nutritional dependency
Post-peel hyperpigmentation — one of the most common complications — is driven by melanocyte overstimulation during the inflammatory healing phase. Women with high systemic inflammation, high oestrogen relative to progesterone (which drives melanocyte sensitivity), or vitamin D insufficiency have higher risk of post-inflammatory hyperpigmentation. Optimising these factors before a medium or deep peel reduces complication risk. Vitamin C is also specifically relevant here — it inhibits tyrosinase (the rate-limiting enzyme in melanin production) and reduces hyperpigmentation risk both pre and post-procedure.

The hormonal skin story

Oestrogen is the most important hormone for skin health in women — and its decline through perimenopause produces some of the most significant and rapid changes in skin quality that most women experience.

Oestrogen receptors are present throughout the skin — in keratinocytes, fibroblasts, sebaceous glands, and hair follicles. Oestrogen maintains skin thickness by stimulating collagen production (oestrogen-replete skin contains more collagen than oestrogen-deficient skin, independent of age). It maintains skin hydration by stimulating hyaluronic acid and glycosaminoglycan production in the dermis. It regulates sebum production and influences the wound healing response.

The skin changes that many women notice in their early to mid-forties — increased dryness, loss of plumpness, accelerated line formation, slower healing from minor trauma — are substantially driven by the declining and fluctuating oestrogen of perimenopause, often years before menopause is formally reached.

Progesterone also has direct skin effects — sebum regulation (progesterone deficiency contributes to adult acne patterns), anti-inflammatory effects on the skin, and a modulatory role on oestrogen's effects at the skin level. The oestrogen-progesterone ratio matters for skin, just as it matters for mood, cycle regularity, and inflammatory tone.

Cortisol is the other major hormonal driver of skin ageing. Chronic cortisol elevation impairs collagen synthesis directly (glucocorticoids suppress fibroblast activity), increases matrix metalloproteinase activity (accelerating collagen degradation), impairs skin barrier function, and drives the inflammatory cascade that underpins both accelerated intrinsic ageing and impaired response to aesthetic procedures.

A woman presenting for aesthetic treatment with unaddressed hormonal dysregulation — low progesterone relative to oestrogen, chronically elevated cortisol, suboptimal thyroid conversion affecting cellular metabolism — is presenting with a skin environment that is working against the procedures she's investing in.

The two-pronged approach

A Better Model — Inside and Outside, Together
Before the procedure
Optimise the foundation
Assess and correct nutritional status — ferritin, zinc, vitamin C functional status, vitamin D, protein adequacy. Map the hormonal environment — oestrogen, progesterone, cortisol pattern. Identify and reduce systemic inflammation — gut dysbiosis, food reactivity, toxic burden. A 6–8 week nutritional optimisation period before a course of microneedling or laser resurfacing changes the biological context in which the procedure operates.
During and after
Support the response
The collagen synthesis stimulated by aesthetic procedures requires ongoing nutritional support to reach its potential. Vitamin C, zinc, adequate protein, and anti-inflammatory dietary patterns support the remodelling phase that continues for weeks to months after the procedure. Hormonal support — whether through nutritional intervention, bioidentical hormone therapy where appropriate, or stress physiology management — maintains the skin environment that makes results last longer.

The inflammation question

Chronic low-grade inflammation is perhaps the single most important modifiable factor in skin ageing — and the one least addressed by the aesthetics industry.

Inflammaging — the term coined to describe the chronic, low-grade, sterile inflammation that accumulates with age and drives multiple ageing processes simultaneously — affects skin visibly and measurably. Elevated inflammatory cytokines (IL-1β, TNF-α, IL-6) activate matrix metalloproteinases that degrade collagen and elastin. They impair fibroblast function. They disrupt the skin barrier. They accelerate melanocyte activity and drive pigmentation irregularities.

The sources of this inflammatory load are largely the same ones we discuss in the context of overall health: gut dysbiosis and intestinal permeability (generating LPS and endotoxin load), chronic HPA axis activation (cortisol and inflammatory cytokine dysregulation), environmental toxic burden, food reactivity, and nutritional insufficiencies that impair antioxidant and anti-inflammatory pathways.

An elevated CRP — even within the conventional "normal" range — is a signal that inflammaging is occurring and that aesthetic procedures are operating against an inflammatory headwind. Reducing that inflammatory load before and during an aesthetic treatment course is not a soft wellness consideration. It is a clinically meaningful modification of the biological environment in which the treatment is working.

The aesthetics industry sells procedures to a demographic that is often nutritionally depleted, hormonally disrupted, and running a high inflammatory load. The procedures work better on a different biological foundation. Nobody is building that foundation before handing over the treatment plan.

What a proper pre-procedure assessment would look like

If I were designing the intake process for an aesthetics clinic that took this seriously, it would include:

Blood chemistry — ferritin (not just haemoglobin), zinc, copper, vitamin D, vitamin C (functional assessment via OAT if serum is normal but skin healing is poor), CRP as an inflammatory marker, fasting glucose and insulin (glycation drives advanced skin ageing via AGE formation), full thyroid panel including free T3 and antibodies.

Hormonal assessment — particularly relevant for women over 38. Oestrogen and progesterone relative to each other, cortisol diurnal pattern (DUTCH Plus gives this picture), DHEA as a marker of adrenal reserve and counter-regulatory hormone to cortisol.

Gut assessment — where there is a history of poor wound healing, recurrent skin conditions, or high inflammatory markers, a GI-MAP revealing the underlying gut picture changes the clinical recommendation significantly.

Nutritional adequacy assessment — protein intake, dietary adequacy of collagen precursors, antioxidant status.

This is not a barrier to aesthetic treatment. It is a preparation for it — one that improves outcomes, reduces complications, extends the duration of results, and addresses the biological reality that the procedures are operating within.

The conversation worth having

I am not making the argument that aesthetic procedures are unnecessary or that nutrition alone produces the same results. For established structural changes — significant volume loss, deep static lines, significant textural irregularity — the procedures offer something that nutritional intervention cannot fully replicate, and the results, in skilled hands, can be significant and confidence-restoring.

The argument is that these two approaches are not alternatives. They are complementary — and the combination produces better outcomes than either alone.

A woman who has optimised her nutritional foundation, addressed her hormonal environment, and reduced her inflammatory load before a course of microneedling will produce more collagen in response to the same procedure than one who hasn't. Her results will be better. They will last longer. Her recovery will be faster. And the improvements to her skin environment will continue to accumulate between procedure sessions in a way that slows the rate at which she needs to return.

The aesthetics clinic gives her the stimulus. The nutritional and functional work gives her the biology to respond to it fully.

That is the two-pronged approach — and it is the conversation that most women paying significant sums for aesthetic treatments are not being offered.

Relevant Investigation

Blood Chemistry Panel — ferritin, zinc, vitamin D, CRP, glucose, insulin, full thyroid · DUTCH Plus — cortisol pattern, oestrogen, progesterone · GI-MAP — gut inflammation and barrier integrity · OAT — functional nutrient status and oxidative stress burden

Investing in aesthetic treatments?

The biological foundation determines the results. The DH Clinical Concierge can help you understand what a pre-procedure functional assessment would look like for your specific picture.

Talk to the Concierge

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