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Flex Guard Flex Guard 375g
14.88 $
Location: eu

Flex Guard 375g

From 3 units only: 14.59 $ / Units. -2%

Shipping weight: 450g
14.88 $With VAT
0.60 $ / serving
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  • Facilitates collagen synthase type I and II
  • Slows down degradation of connective tissue
  • Increases the production of synovial fluid
  • Protects from abrasion of cartilage surface of joints
  • Multidimensionally inhibits inflammation
  • Provides connective tissue with nutritious substances
  • Increases tolerance of the immune system to collagen
  • Promotes hydration reaction of cartilage
  • Increases mineralization of osseous tissue
  • Reduces pain in joints
  • Active substances with efficient absorption
  • Supports regeneration of joints after injuries

Trec Flex Guard is a multi-ingredient dietary supplement, which effectively supports the health of joints and connective tissue. The substances in the composition of the preparation facilitate natural collagen synthesis in the organism and inhibit inflammatory processes. Thanks to this, the supplement slows down the first signs of aging of the organism and facilitates regeneration after injuries.

Collagen hydrolysate type I - is a protein component, which provides the organism with an easily available form of ingredients taking part in the synthesis of connective tissue. This type of collagen is the most well-known form of this protein in the organism, where it constitutes the main building block for skin.

Collagen hydrolysate supports maintaining proper condition of skin, bones and joints, despite passing time. It results from the fact, that with age the effectiveness of collagen biosynthesis drops, which is responsible for the appearance of the first signs of aging. Hydrolyzed form of collagen type I ensures a valuable source of amino acids in the form of: glycine, proline and hydroxyproline. They ensure proper structure and stabilization of this protein, which ensures a good state of skin tissue and cartilage matrix.

MSM - a compound, which is also called organic sulfur. It ensures a good source of this element. It is responsible for maintaining proper structure of cartilage matrix, as it ensures its proper hydration reaction. Thanks to this, joints are characterized by proper mobility and lubricating their surfaces protects from abrasion of cartilage surface.

Organic sulfur is characterized by a strong anti-inflammatory and antioxidant potential. Such an effect is conditioned by the fact, that the active substance inhibits the secretion of pro-inflammatory substances (IL-2). Moreover, the activity of COX-2 enzyme is reduced, which takes part in the synthesis of prostanoids, which stimulate the course of inflammation. Thanks to this, MSM demonstrates analgesic effect and protects from the occurrence of degradation.

Glucosamine sulfate - is a natural amino saccharide, which takes part in creating cartilaginous tissue in the organism. The presence of the sulfate group ensures efficient absorption of the active substance in the intestines.

Proper supply of collagen slows down collagen breakdown progressing with age and mitigates the symptoms of inflammation. It is conditioned, as glucosamine molecule constitutes one of the substrates necessary for the production of this protein, thanks to which it ensures proper structure and function of the connective tissue.

Similarly to MSM, it inhibits the activity of COX-2, thanks to which it effectively supports the organism in reducing chronic inflammations and slows down the development of degradations. Thanks to such an effect, glucosamine sulfate demonstrates analgesic effect, reduces skin redness and swelling.

Glucosamine sulfate is hydrolyzed in the organism to glucosamine and sulfur compounds. The latter ensure proper flexibility and hydration of cartilages, which protects them from wearing out.

Collagen hydrolysate type II - a peptide, which constitutes a basic building block of cartilaginous tissue in the organism. The hydrolyzed form of this protein ensures easily available source of ingredients, which ensure efficient absorption of collagen type II. It protects the structures built of this compounds (cartilages, ligaments and tendons) from weakening. 

The active substance demonstrates immunosuppressive effect, conditioned by increasing the organism’s tolerance to this antigen, i.e. protein. Collage hydrolysate type II induces the appearance of lesions in dendritic cells, which are responsible for the presentation of antigen for lymphocytes T. It results in their differentiation to anti-inflammatory populations of regulatory lymphocytes T, which secrete cytokine IL-10. It inhibits pro-inflammatory influence of interleukin 17, which effectively reduces inflammation in joints.

Apart from the direct influence on the synthesis of collage type II in the organism, hydrolysate stimulates the production of collagen type I and hyaluronic acid. It ensures good state of skin tissue and delays the occurrence of the first signs of aging.

L-proline - is an amino acid, which is essential in the process of protein synthesis. Among the compounds in this group, it is distinguished by the secondary structure, which considerably differentiates it from other amines. Proline is an important ingredient, which ensures efficient production of collagen (the main ingredients of skin, cartilages and bones).

This compound ensures proper structure of joint surfaces, thanks to which they have proper amortization and hydration. It results from the fact, that proline is a precursor of hydroxyproline, which provides cartilage with such properties.

People who practice professional sports have a very low level of this compound in the organism, thanks to which they are more prone to injuries.

Chondroitin sulfate - a natural compound taking part in the synthesis of connective tissue in the organism. The combination of chondroitin and mineral salt ensures its higher level of absorption, thanks to which it achieves effective concentration in the organism in a shorter period of time.

This compound is one of the main components of extracellular matrix, which ensures integrity and proper consistency of connective tissue. Thanks to this, the joint has proper mobility and protects from the occurrence of excessive immune response.

A sulfur atom contained in the preparation ensures proper hydration in the cartilage, thanks to which the joint has proper lubrication and elasticity. Moreover, this element forms a barrier on the surface of joints, which absorbs shocks, protects from compression and damages.

Omega-3 fatty acids - are unsaturated fatty acids, which in this complex are divided into: eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Their properly high intake ensures many health benefits. They are mainly related to their anti-inflammatory activity.

Fatty acids omega-3 inhibit the occurrence of inflammation at the level of transcription. It is conditioned by inhibiting the secretion of pro-inflammatory IL-10 and TGF-β and decreasing the activity of COX-2. This compound takes part in the synthesis of prostaglandins, which stimulate the occurrence of inflammations.

The supplement constitutes an important component of cell membrane of chondrocytes. After building in, they decrease the synthesis and secretion of enzymes, which have degenerating influence on joint cartilage. It protects from the development of osteoarthritis.

Polyunsaturated fatty acids also facilitate the provision of calcium to bones, which reduces the risk of osteoporosis.

Calcium - is an incredibly important mineral, which is a vital building block of bones and teeth. Maintaining a proper level of this element ensures proper bone mineralization, which is reflected in their structure and endurance. With age, the absorption of calcium to bones decreases, which is a factor that leads to the development of osteoporosis.

Magnesium - an essential microelement, which plays many positive functions in the organism. The main reservoir of this element is bone tissue, in which it is an important building element. Deficiency of magnesium is related to bone demineralization, which considerably weakens their endurance.

This element also has normalizing influence on the level of active vitamin D in the organism. It takes part in calcium metabolism, thanks to which it protects from bone mass decline.

Vitamin C is one of the best-known pro-health substances. Its proper supply in a diet or supplementation is essential, as the human organism does not have an enzyme, which is responsible for its synthesis.

This vitamin is an important cofactor, essential for the proper synthesis of collagen. Providing a proper amount of this compound slows down the drop of effectiveness of this process, which takes place with age.

It was noticed that among women in menopause, it inhibits bone demineralization, thanks to which it protects from the development of osteoporosis.

Hyaluronic acid - is a multi-molecular polysaccharide, which is composed of alternately occurring: D-glucuronic acid and N-acetyl-D-glucosamine. The main amount of this compound appears in joints, where it constitutes a lubricant and ensures proper amortization for bone structures.

Hyaluronic acid supports the organism in the fight with inflammations, which is a factor that inhibits the development of degradation.

It also positively influences the state of skin. Providing it with proper hydration ensures flexibility, elasticity and inhibits the development of wrinkles.

The supplement Flex Guard by Trec  is a preparation, in the composition of which there are ingredients, which nourish connective tissue of the organism and inhibit inflammation. Thanks to such an effect, the product ensures proper functioning of joints and improves the state of skin. The supplement is recommended to elderly people and those who practice professional sport. It supports collagen regeneration and the fight with inflammations. 

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Container size: 375 gDaily serving size: 15 g (2,5 scoops)Servings per container: 25
per portion (15g)amount%RDA
Hydrolyzed Collagen (Type I)7000 mg**
MSM (Methylsulfonylmethane)750 mg**
Glucosamine sulphate 2KCl500 mg**
including D-glucosamine296 mg**
Hydrolyzed Collagen (Type II)500 mg**
L-Proline500 mg**
Chondroitin sulfate150 mg**
Omega-3 Fatty Acids54 mg**
including EPA16,2 mg**
including DHA10,8 mg**
Calcium (Calcium phosphate)120 mg15%
Magnesium (Magnesium citrate)55 mg15%
Vitamin C (L-ascorbic acid)60 mg75%
Hyaluronic acid (Sodium hyaluronate)20 mg**

Other ingrednients

Maltodextrin, Acidity regulators (Citric acid, Malic acid), MEG-3® POWDER – microcapsulated fish oil [60% refined fish oil, Gelatin, Anti-caking agents (Sodium phosphate, Calcium silicate), Maltodextrins, Acidity regulators (Sodium ascorbate, Citric acid), Rapeseed oil, Flavors, Antioxidant (Tocopherols), Sunflower oil], Coloring for mango-orange flavor (Beta-carotene), coloring for forest fruits taste (E122), Sweetener (Sucralose).

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Collagen hydrolyzate (FORTIGEL)


Collagen hydrolyzate (FORTIGEL) obtained by enzymatic hydrolysis of collagen, which is a major ingredient, building up connective tissue (tendons, ligaments cartilage, bone, and blood vessels), from the group of fibrous proteins (i.e. fibrous scleroproteins). Patented formula of collagen hydrolyzate, forming amino acids (such as proline, glycine, hydroxyproline and hydroxylysine) connected by peptide bonds. It is a substance easily digestible and well assimilable . Recommended in sports supplementation and for people, who are particularly active, as well as during convalescence after injuries and certain diseases.
Dosage: 10-20g per day (normally used in supplementing).


MSM (Methylsulfonylmethane)


MSM (Methylsulfonylmethane) - dimethyl sulfoxide derivative, wherein the sulphur content is as by creating structural bonds sylfhydrylowych stabilize the protein particles and ensuring the proper functioning of the tissue and its biological regeneration. MSM has anti-inflammatory activity (within the connective tissue, mucous membranes and digestive disorders). In the sports supplementation recommended for people with special physical activity and during convalescence after injuries. Also used in the prevention of treatment of diseases of old age. Available in multiple formulations, also containing chondroitin, hydrolyzed collagen, hyaluronic acid, extracts of vegetable dyes (turmeric), extracts of ginger root, ascorbic acid and minerals to support the functioning of the locomotor system.
Dosage: 250-1000 mg daily (customarily taken in sports supplementation).


Glucosamine sulphate


Glucosamine sulphate (glucosamine) is an amino sugar present in cartilage matrix; compound needed for the glycosaminoglycans and proteoglycans, affecting its structure and flexibility, increasing immunity to overloads. Glucosamine is synthesized in the human body, it can be supplied from the outside (a component of shells of marine crustaceans, and in coatings for fungi) as supplements. Increased demand for glucosamine occurs in sports training (athletes exposed to overload the musculoskeletal system), during convalescence after injuries and contusions, moreover, in the case of older people in prevention and therapeutic of degenerative changes of the locomotor system. Glucosamine occurs as mono-preparation or multiple preparations (including, among others, hyaluronic acid and chondroitin, collagen hydrolyzate and ascorbic acid) in supplementation in supporting the functioning of the musculoskeletal system, such as d-glucosamine sulphate 2KCl; HCL Poly NAG.
Dosage: 500-1500 mg per day.




Proline - endogenous amino acid, one of the 22 amino acids building proteins. As a result of the conversion (carried out with the participation of vitamin C) in the form of hydroxy-proline, it is the ingredient of collagen ( basic protein of connective tissue). Influences positively the locomotor system especially in people exposed to an overload (e.g. strength and endurance sports athletes) and during rehabilitation after injury or surgery of locomotor system organs. It is naturally occurring in food, or is synthesized in the body from glutamate. In the dietary supplementation it is a component of high-protein nutrients, amino acid products (in the form of proline or hydroxy-proline), and supporting the functioning of the locomotor system that contains collagen available at
Dosage: No standards for use. Dosage as customarily in supplementation

Chondroitin sulfate


Chondroitin sulfate has chondroitin in its composition, belonging to the glycosaminoglycans, affecting the maintenance of joint stability and strength (building component of cartilage). Chondroitin sulfate proteins involved with the synthesis of proteoglycans. It is synthesized in the body or delivered in the foods of animal origin (e.g. containing tissue). It is used by athletes in the disciplines greatly aggravating the locomotor system with exercises, as well as in the treatment of sports injuries and joint recovery and rehabilitation after injuries, increased demand also occurs in people of advanced age. In the sports supplementation is a component of multi-component combined supplements, often containing hyaluronic acid, glucosamine and hydrolysed collagen, supporting the functioning of the locomotor system.
Dosage: 500-1500 mg per day.


Omega 3


Omega-3 (n-3) group of unsaturated fatty acids: short-chain (linolenic acid, belongs to the EFAs [essential fatty acids]) and long-chain (eicosapentaenoic acid [EPA] and docosahexaenoic acid [DHA]). The number 3 indicates That the last double bond in the carbon chain is the third from the end of carbon. Acids from the group of Omega-3 are essential components of cell membranes, they are biological precursors and activators of eicosanoids. EFAs quite abundantly supplied in food, and it can be supplied with food. EPA and DHA (oils, fats marine fish) are Supplied by foods of sea origin (sea fish and seafood). They are developed also in the human body as a result of processes of denaturation and elongation of alpha-linolenic acid , but in an amount insufficient for the full needs of the organism. Therefore,they should be supplied from the outside. With the use of so-called. western diet, supplementation of fatty acids Omega 3 is more desirable (than Omega 6).
Supplementation of fatty acids of Omega 3 is recommended for people who are physically active in order to supplement and to prevent deficiencies in body as well as due to their impact on the body composition and aerobic capacity, and tissue regeneration. In addition, it regulates the systems: circulatory (including heart), nervous, respiratory and locomotor. Formulations containing EPA and DHA are a complement to an effort diet, regardless of the degree of training and exercising.
Dietary fatty acids Omega 3, in principle, are produced in the form of capsules in combination with vitamin E as an antioxidant, available for purchase at:
Dosage usually we recommended supplements in sports: depending on the supply of diet and intake of Omega 6 it is 1 - 5 g of EPA and DHA / 24 h.

EPA (eicosapentaenoic acid)


EPA (eicosapentaenoic acid) – what is it?

EPA (eicosapentaenoic acid) is a long-chain, polyunsaturated omega-3 fatty acid. The chain of the fatty acid consists of 20 carbon molecules, and the first bound out of five double bounds is located at the third carbon from the omega end, which is characteristic for omega-3 acids. It is present in large quantities in fish oils, where it is accompanied by docosahexaenoic acid (DHA).

EPA is a precursor to prostaglandins and other eicosanoids, which contributes to the reduction in inflammations. It is involved in inhibition of platelets aggregation. It contributes also to the reduction in triglycerides level in blood. EPA block the activity of an enzyme, phospholipase A2, present on cell membranes, which under the influence of stressors can release polyunsaturated fatty acid (from the group of eicosanoids) into the glycerol skeleton. To some extent, EPA can be also converted into 22-carbon DHA. The both acids have positive impact on the condition of the nervous system and cardiovascular health.

Eicosapentaenoic acid contained in dietary supplements with omega-3, which are available in the offer of

DHA (Docosahexaenoic acid)


DHA (docosahexaenoic acid) - acid of omega-3 family, unsaturated fatty acids with the last double bond in the chain located on the third carbon atom from the end. Synthesized in the human body to eicosapentaenoic acid, or retrieved from foods of marine origin (fish, particularly salmon). In the medicine it is indicated for the treatment of depression, Alzheimer's ADHD. There has been its positive impact on the insulin metabolism noted as well as on endocrine and cardiovascular systems. When used in appropriate doses, it has a beneficial effect on the composition and appearance of the body. In the the supplementation it is part of formulas containing fish oil, which fill in the gaps of unsaturated fatty acids Omega 3, recommended for people with different physical activity.
Dosage: 200-2000 mg per day




Calcium (element chem. symbol Ca, atomic no. 20, the group of alkaline earth metals) is the basic building substance of bones and teeth, in which stored is 99% of the element, in the form of hydroxylapatite. When building bones and teeth, phosphorus is very important in the right proportion. It is a base-forming element and activator of many enzymes (ATPase) necessary to release the energy of ATP. It has a significant effect on blood clotting and regulates blood pressure and neuromuscular conductivity. Thanks to the reduced permeability of cell membranes, it soothes the symptoms of food allergies. Calcium is actively involved in the metabolism of iron interacts with vitamins A, C and D and phosphorus, magnesium. Natural source of calcium are animal products (dairy products, sardines, salmon, sprats eaten with bones) and plant products (nuts, soybeans, sunflower seeds). Absorption takes place in the small intestine (less in the colon), it has an effect on the level of lactose, insoluble fibre, organic acids, alkalinity (low pH). The best absorption have organic compounds (lactates, amino acid chelates etc.). Obstructing the absorption of calcium is caused by: phytic acid and oxalic acid as well as excess fat. Scientific studies have confirmed that the combination of calcium, magnesium, boron and vitamin D in dose 3 mg / 24h effectively prevent osteoporosis. Supplements on the market are both mono-preparation supplements (enriched with vitamin D3) and multi-component supplements, available at
Calcium deficiency disorders manifested in the construction of the bones (osteoporosis) and iron metabolism. The symptoms are: rickets, cramps and muscle tremor, osteoporosis.
Excess result
ing from an overdose of calcium supplements containing vitamin D3 for children and adults overdose of calcium (hypercalcemia). Symptoms of hypercalcemia are: lack of appetite, vomiting and constipation.
The dosage administered in various publications
are inconsistent: 800 - 1000 mg / 24 h (100 - 500 mg / 24h)



Magnesium (element from the group of alkaline earth metals, atomic no. 12, a chemical symbol - Mg), one of the most important health microelements, participates in the synthesis process of the disintegration of high energy compounds and processes of transformation of hydrocarbons and fats. It affects the dilation of blood vessels and lower blood pressure, prevents hypercoagulable state. Shortages affect cardiac arrhythmias, malignant muscle cramps, insomnia and anxiety. It is a component of many dietary supplements and found in foods such as whole grain bread, legumes, buckwheat, rice, fish, meat, as well as chocolate, cocoa and nuts.
Dosage of 100 - 500 mg / day

Magnesium citrate


Magnesium citrate is a salt of magnesium and citric acid. It constitutes one of the best assimilable forms of magnesium, which plays many important functions in the organism. It is responsible, among others, for the proper work of the nervous, immune and muscle systems.

Magnesium has calming effect by decreasing the excitability of nerve cells. Thanks to introducing this element to a diet, we may potentially improve sleep quality and reduce the level of stress.

Positive influence on the circulatory system is another feature of magnesium. It prevents hypertension and storage of cholesterol in the walls of blood vessels (arteries), thanks to which it may prevent diseases related to the circulatory system.

Magnesium also plays a considerable role in the process of muscle contraction, therefore it influences the activity of the whole muscle system. It also takes part in the proper synthesis of protein, the process of cell division and proper course of energy metabolism. It helps to maintain healthy teeth and bones and general electrolyte balance in the organism.

Vitamin C


Vitamin C (ascorbic acid) it is a vitamin soluble in body fluids, can be taken from foods (fruits and vegetables), or as drug derived synthetically. The largest of its resources can be found in broccoli, Brussels sprout, kale, black currant fruit and hawthorn, citrus fruits, tomatoes, Savoy cabbage, potatoes. In fact, intake of vitamin C of the food products does not limit the absorbed quantity. Vitamin C (ascorbic acid) is a potent antioxidant, it is an antitoxic, increasing the immune system due to the elimination of risk of bacterial contamination. Vitamin C prevents rupture of blood vessels, affects the blood cholesterol level. It substantially increases the absorption of iron. Inhibits the growth of cancer cells. Lowers stress levels.
Vitamin C deficiency causes abnormal development of connective tissue, cracking capillaries, abnormal calcification of bone tissue, impaired
absorption of iron, scorbutus. With the lack of vitamin C, all kinds of injuries do not heal up properly. Vitamin C deficiency can be caused by smoking; each cigarette is destroying up to 100 mg of vitamin C.
Dosage: The demand is 60-80 mg daily. It does not limit the ability to consume higher doses. Some side effects may occur only with longer
taking of synthetic vitamin C.

Ascorbic acid


Ascorbic acid – vitamin C. Its biologically active form is the L-isomer, which negatively rotates the polarised light, so that it is a dextroisomer (laevorotatory vitamin C does not exist). It is a strong antioxidant; it reduces the amounts of free radicals, which reduces oxidative stress, a factor leading to cell apoptosis, which is why it is indicated to be a cause for premature ageing.

It supports the immune system functions and increases body system immunity. It is an essential element of the collagen synthesis path, which is why it positively affects the condition of connective tissue. Hence, it promotes also wound healing and increases the durability of capillary vessel. It is involved in transformations of tyrosine and carnitine as well as of some nutrients, so that it affects metabolism. It can also have an impact on the nervous system functions, as it reduces mental fatigue.

Higher supply of vitamin C is especially recommended in the periods of more intensive body system burden, after infections and in order to accelerate regeneration. The indications for increased supply of the vitamin are also hard physical work or intensive trainings.

Hyaluronic acid


Hyaluronic acid (sodium hyaluronate) is a glycosaminoglycan, which do not form covalent bonds with proteins and does not contain sulfate groups. Creates so called proteoglycans aggregates absorbing water and which are responsible for the resistance of cartilage. It is one of the components responsible for the intra-articular fluid viscosity. It takes part in the regeneration of skin tissue. It is synthesized in the body providing a full daily demand. Supplementation applies to athletes exposed to overload of the locomotor system. It is a component of preparations supporting the regeneration of joints and tendons and cosmetics supporting the condition of hair, skin and nails.




Sodium is an important component of the intracellular fluids, and is a regulator of acid-base balance. Along with potassium affects the proper of growth and provides the proper functioning of muscles and nerves. The source of acquisition is table salt (NaCl) and bladderwrack, shellfish, bacon, beef, and of plant beets and carrots. People on salt-free diet should avoid, among others, spicy sauces and smoked meats and sausages.
Sodium deficiency is very rare, at heaving sweating after a long effort (e.g. in the marathon).
Excess sodium increases blood pressure (especially for the elderly), edema and increased thirst. Exceeding the daily dose of 14g a day can cause poisoning.


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