Guna Collagen Medical Devices: What They Are and How They Work

Part 1 of our Deep GUNA Research series on Collagen Medical Devices, for practitioners.

This article is written for a practitioner audience and draws directly on GUNA's own published reference material on Collagen Medical Devices. It is educational in nature and does not replace clinical judgement or personalised medical advice. Guna Collagen Medical Devices are intended for administration by a qualified medical practitioner.

Collagen is the most abundant protein in the human body, and a deficiency in it contributes directly to inflammatory and degenerative disease of the locomotor apparatus. GUNA's Collagen Medical Devices are a range of products built around this single observation: that supplying biological collagen, locally, at the site of tissue damage, can support the body's own repair process — as a mechanical support, a lubricant, and a barrier, rather than as a drug in the conventional sense.

This article sets out what these devices are, how they're classified as medical devices rather than pharmaceuticals, and the biological rationale behind them. The two articles that follow cover the full product range in detail, and the anatomical injection technique used to administer each one.

Medical Devices, Not Pharmaceuticals

Guna Collagen Medical Devices are classified as local mechanical support treatments for osteo-arthro-myo-fascial pathologies under Directive 93/42/EEC — the EU Medical Devices Directive — rather than as pharmaceutical products. This distinction matters clinically: their intended action is mechanical and structural (supporting damaged tissue, improving the structure of collagen fibres, providing physical support to distressed anatomical structures) rather than pharmacological.

The collagen used across the range is Type I Tropocollagen, with a molecular weight of approximately 300kDa, supplied at a concentration of 100µg per 2ml vial (roughly 2×10¹⁴ molecules per 100µg). Each device pairs this collagen base with a specific auxiliary substance — mineral, vitamin, trace element, or plant-derived — chosen for its relevance to the anatomical area or tissue type the device is designed for.

Thirteen Products, Two Groupings

The range comprises 13 individual devices, organised into two groups:

Seven products target specific anatomical skeletal regions: MD-NECK, MD-THORACIC, MD-LUMBAR, MD-SHOULDER, MD-HIP, MD-KNEE and MD-SMALL JOINTS.

Six products are organised by tissue type or mesodermal origin, rather than a single anatomical region: MD-ISCHIAL (specific to the sciatic nerve), MD-MUSCLE, MD-NEURAL, MD-TISSUE (soft tissues generally), MD-MATRIX (the extra-cellular matrix), and MD-POLY (multi-articular presentations).

Each device is supplied as a box of 10 sterile vials of 2ml, intended for subcutaneous, intradermal, periarticular, intra-articular, or intramuscular administration depending on the product and the presentation being treated.

Why an Auxiliary Substance Is Added to Each Device

The auxiliary substances aren't arbitrary — each is chosen for a specific rationale tied to the region or tissue the device targets:

• MD-HIP is paired with Calcium Phosphate, the main mineral constituent of bone tissue, relevant to osteoarthritis and femoral head/osteochondrosis presentations.
• MD-KNEE is paired with Arnica, chosen for its traditional relevance to traumatic joint injury and its anti-inflammatory constituents (sesquiterpene lactones including helenalin).
• MD-LUMBAR is paired with Hamamelis, selected on the basis of histological affinity for regulating and stabilising the tone of striated muscle — relevant to back pain from bad posture or lumbar muscle contracture.
• MD-THORACIC is paired with Cimicifuga, traditionally used for neck and back stiffness and intercostal rheumatism.
• MD-SHOULDER is paired with Iris, traditionally used for joint pain, particularly of the shoulder.
• MD-ISCHIAL is paired with Rhododendron, chosen for its rutoside (flavonoid) content and traditional use for rheumatic pain, low back pain and sciatica.
• MD-SMALL JOINTS is paired with Viola, traditionally used for metacarpal and carpal pain and rheumatism.
• MD-NECK is paired with Silica, relevant to bone and cartilage formation.
• MD-NEURAL is paired with Colocynthis, used across several traditional medicine systems (particularly Middle Eastern and Asian) for nerve-origin joint and neural pain.
• MD-MUSCLE is paired with Hypericum, whose hyperforin and essential-oil constituents act on the musculoskeletal system with antinociceptive and anti-inflammatory properties.
• MD-MATRIX is paired with Citric Acid and Vitamin PP (Nicotinamide), both essential to cell metabolism and electron transport, chosen to strengthen the extracellular matrix and increase antioxidant defence.
• MD-TISSUE is paired with Vitamin C, Magnesium Gluconate, Riboflavin (B2), Thiamine (B1) and Pyridoxine (B6) — a cluster of antioxidant and metabolic cofactors: ascorbic acid as a water-soluble antioxidant, riboflavin for antioxidant and erythropoietic action, thiamine for its anti-neurotoxin action, and pyridoxine for its role in bone metabolism.
• MD-POLY is paired with Drosera, used at low dose alongside the mechanical action of the collagen itself.

The Repair Process the Devices Are Designed to Support

GUNA's rationale for local collagen supplementation rests on the natural chronobiology of tissue repair, which unfolds over roughly 12 months following injury or the onset of overuse or age-related damage: an initial inflammatory phase, followed by a proliferative phase, and finally a remodelling, consolidation and maturation phase. Standard acute-injury management (rest, ice, compression, elevation, and where appropriate NSAIDs) addresses the inflammatory phase; GUNA positions its Collagen Medical Devices as support through the later phases, where the structural rebuilding of collagen fibres is the limiting factor in functional recovery.

GUNA-COLLAGEN and Aesthetic Use

Alongside the 13 musculoskeletal devices, GUNA also produces a collagen-only injectable — Guna-Collagen — for aesthetic use, and a companion product, Guna MADE, for face and neck biolifting. Guna-Collagen is used for the synthesis of autologous collagen and the treatment of face and neck wrinkles, scars and stretch marks, administered via mesotherapy (fine intradermal injections) or the tunnelling technique described below. A standard protocol is one weekly treatment for 8–10 consecutive weeks, with maintenance sessions of 3–4 times a year; one vial is generally sufficient for a full-face treatment. Guna-Collagen is commonly combined with Guna MADE for deeper wrinkle treatment.

Two administration techniques are used across GUNA's injectable collagen range:

• Nappage technique — superficial intracutaneous injections at 2–4mm depth, delivered at a 30–60° angle with a 4mm needle, used for general skin treatment.
• Tunnelling technique — used for deeper wrinkles and scars: the needle is inserted parallel to the wrinkle and passed the full length beneath the skin, then the wrinkle is cannulated by moving the needle gently left and right while withdrawing and injecting.

Needle selection follows the treatment area: a fine 30G/4mm needle for sensitive areas like the face and scalp where smaller product volumes are used, and a 27G/13mm needle for larger body areas.

What Follows in This Series

The next article in this series is a complete practitioner reference for all 13 musculoskeletal Collagen Medical Devices — composition, intended use, standard therapeutic protocol, and the combinations GUNA recommends for specific clinical presentations. The final article sets out GUNA's anatomical injection atlas: the specific landmarks, needle gauge, depth and technique used to administer each device by body region.

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Related reading

• The Complete Guna MD Collagen Device Reference for Practitioners
• Guna Collagen Medical Devices: Anatomical Injection Atlas for Practitioners

Source: GUNA, *Collagen Medical Devices* reference catalogue, and *Injectable Vials for Aesthetic Medicine*.

Tags: Deep Guna Research, Guna Articles, Collagen Medical Devices, GUNA Method