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EAA Instant EAA Instant 420g
Fire Snake Nutrition
£ 16.44

EAA Instant 420g

From 3 units only: £ 16.11 / Units. -2%

Shipping weight: 500g
£ 16.44With VAT
£ 0.51 / serving
We can let you know you when the product will be available again
  • A set of amino acids EAA in the optimal dose
  • Maximally intensifies the process of protein biosynthesis
  • Allows to maintain proper condition of bones and joints
  • Influences considerably more effective transport of oxygen to cells
  • Additive of vitamins and microelements, visibly improving muscle work
  • Increases the amount of energy available for muscle cells
  • Improves the functions of neuromuscular junction
  • Prevents excessive muscle cramps
  • Effectively supports anabolic processes

FSN EAA is a specialized preparation containing a set of exogenous amino acids, essential to build good-quality muscle mass and a set of vitamins and microelements, which allow to provide muscle tissue with oxygen and energy, essential to perform demanding strength workouts.

Anabolic power of exogenous amino acids
Muscle mass is mainly built of proteins, which in turn are composed of “bricks”, called amino acids. Exogenous amino acids (EAA, Essential Amino Acids) are especially important for the gain of muscle mass, which contrary to endogenous amino acids (NEAA), the organism is not able to synthesize by itself and they are at the same time essential for initiating the process of building muscle tissue. BCAA, i.e. branched-chain amino acids, in the composition in which there is important leucine, but also isoleucine and valine, are a sub-group belonging to EAA.

The process that determines muscle mass gain is i.a. protein biosynthesis, which is started by leucin. Without it, the whole “enzymatic machine” is not able to “start” - no new structural muscle proteins appear. The dose of this amino acid present in the supplement allows to effectively intensify anabolic processes in muscles.

Importantly, EAA also have anticatabolic effect and they contribute to increased post-workout recovery of muscles, which is undoubtedly reflected in visible improvement of strength results and in the longer perspective, it influences the improvement of general body composition of a training person.

We should not forget about other important functions of amino acids in the organism. Liver, as a “laboratory” of the organism, also deals with their metabolism, thanks to which we may obtain metabolic fuel from them in the form of glucose or fatty acids. Moreover, they considerably facilitate the aggregation of glycogen, a compound which constitutes the store of metabolic energy for intensively working muscles, for the functioning of which it is essential during tough training sessions.

They also have positive influence on the central nervous system - they especially increase the level of noradrenaline in synapses, at the same time limiting the feeling of fatigue, considerably improving concentration and motivation to workout.

In other tissues, amino acids are precursors of hormones (they stimulate the production of thyroid hormones, which contribute to accelerating metabolism), creatine (with proven anabolic effect), nucleic acids (essential for the synthesis of the genetic material), nitric oxide (allowing to better supply muscles in fuel and oxygen, improving efficiency). All these effects are reflected in the proper functioning of the organism as a whole.

It is also worth highlighting an important role of quite a “different” amino acid, which plays an important regulatory role in the process of forming new proteins in muscles. L-Cystine is a compound which occurs as a result of combining two molecules of amino acid cysteine. Due to having a disulfide bridge in its structure, it takes part in the production of similar bonds in muscle proteins, “supervising” the creation of proteins with proper structure.

Regulatory activity of vitamins
Vitamin C
is also known as ascorbic acid and its advantages are known to everyone. The presence of this vitamin in a diet is especially important when it comes to the functioning of the connective tissue and the hormonal system. It takes part in the synthesis of collagen - the main protein building connective tissue, osseous tissue and cartilaginous tissue which is especially important to sportsmen, as it improves that functioning of the articular apparatus, preventing injuries. Moreover, its presence is required for the synthesis of adrenaline, i.e. the “fight hormone”, which helps in concentration and carrying out effective training sessions.

Vitamin D is essential for the proper functioning of bones, as it increases the absorption of calcium from food, at the same time taking care of proper calcification of bone tissue, preventing its degeneration. Its supplementation is especially important in our climatic zone, where the access to sunlight is limited to summer months.

Vitamin B2 is a component of coenzymes taking part in the proper of oxygen respiration in cells. It is therefore important, as by taking part in energy metabolism, it contributes to increasing the efficiency of work of muscles.

Vitamin B12 also called cobalamin, plays an important role in the functioning of many systems, especially blood-forming system and nervous system. It also takes care of metabolism. Thanks to this, the production of proper “red blood cells” is possible, which is important for training people, as they transport oxygen and facilitate the performance of properly long efforts. By being responsible for metabolic transformations, it allows to produce a proper amount of energy needed for muscles and nerve cells to work, the cooperation of which provokes effective muscle contractions.

A wide spectrum of activity of microelements
is a microelement, which “plays along” with calcium when it comes to proper structure of bone tissue. Moreover, as a cation, it takes part in the process of muscle contraction, therefore its deficiency makes it impossible to perform proper workouts, as the work of muscle will not be performed effectively in relation to the weight that is lifted.

Copper - is a micromolecule with wide application by cells of our body. It is needed in the process on creation of red cells and influences proper functioning of the nervous system, as it protects neurons from degradation. Moreover, along with vitamin C, it takes part in the synthesis of collagen and as an element of many enzymes, it reduces free radicals, contributing to limiting the occurrence of topical inflammations.

Iron similarly to vitamin B12 is especially important for the proper functioning of the blood-forming system. Iron ions are the component of hemoglobin and myoglobin - a red pigment transporting and storing oxygen, the presence of which contributes to incurring an “oxygen debt” and faster muscle fatigue.

Magnesium is primarily related to the stabilizing influence on the neuromuscular junction, as antagonistically to calcium cations, it inhibits the release of a neurotransmitter that initiates muscle contractions. Its supplementation is especially helpful for people who intensively work out and complain about cramps of calves and smaller body parts.

Molybdenum - is responsible for proper iron absorption and it also takes part in metabolic transformations of fats and carbohydrates, therefore it intensifies the availability of oxygen and energy for muscle tissue.

To sum up, FSN EAA is a complex of carefully selected ingredients with a multidirectional effect - it supports the process of biosynthesis of protein, without which building new protein fibers is impossible, it allows to optimize energy metabolism when it comes to oxygen availability to cells and it also facilitates enzymatic apparatus. The supplement is addressed to people, who value high-end products, the effect of which is proved by many satisfied sportsmen.

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Container size: 420 gServing size: 2 Flat Scoops (13 g)Servings per container: 32
per portion (13 g)amount%RDA
L-cystine0,86 g**
Vitamin C76,8 mg**
Vitamin D4,8 µg130%
Calcium768 mg130%
L-isoleucine0,67 g130%
L-leucine0,94 g**
L-lysine0,81 g**
L-methionine0,87 g**
L-phenylalanine0,94 g**
L-threonine0,47 g**
L-tryptophan0,24 g**
L-valine0,67 g**
Copper0,96 mg130%
Vitamin B21,34 mg130%
Iron13,44 mg130%
Magnesium360 mg130%
molybdenum48 µg130%
Vitamin B12 2,4 µg130%

Other ingrednients

Citric acid, aromas, sweeteners (sucralose, steviol glycosides), anti-caking agents (magnesium salts of fatty acids).


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Cystine is an essential amino acid that contains two cysteine molecules joined by a disulphide bond. This bonds many poisons of the body, acts as an antidote (in the process of detoxification). In combination with glycine and glutamine is involved in the synthesis of glutathione. Cystine is present in the vegetable protein products (corn, peanut), and in available concentrates and whey protein isolates, as well as other amino acids.


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.

Vitamin D


Vitamin D belongs to fat soluble vitamins, occurs in three forms: calciferol (vitamin D1) ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3), it is formed under the action of sunlight for at least 15 minutes per day. In the absence of sunlight it should be administered in the diet in the form of fish oil (Vitamin A + D3) and fish oils. It is responsible for the absorption of calcium and phosphorus. It is the building substance of bone tissue particularly necessary during pregnancy, childhood, and for athletes. It is a component of dietary supplements and nutrients among competetive athletes. Deficiency of vitamin D causes children growth inhibition, and rickets.
For adults - deficiency causes osteomalacia.
of vitamin D causes headaches, alopecia, nausea, drowsiness, blurred vision, pain in the long bones, the deposition of calcium deposits.
Dosage: 400 IU units during the 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)



Isoleucine is an essential branched amino acid (BCAA), leucine-isomer. It has anti-catabolic action ( protects muscle against decay), glucogenic (an alternative energy source when the level of glucose after exercise decreases, helps for the regulation of blood glucose levels, reduces the deficiency of fatty acids), anti-catabolic (muscle protects against decay), reduces stress. It participates in the synthesis of proteins (including the synthesis of hemoglobin). It is an essential part of the regeneration of damaged tissues of the body, and after intense training. It occurs in products containing animal protein (meat and dairy products, eggs, dairy products) and plant (almonds, walnuts) and dietary supplements.
Isoleucine is applied with other branched chain amino acids: leucine, valine, and in the supplement complex type of BCAA, in the proportions: leucine: isoleucine: valine = 2: 1: 1. The supplements used in competitive sports requiring increased strength, the bigger share of isoleucine is used.
Dosage: No standard daily use. Frequently applied directly after the workout during the decrease of the glucose level of or at fatty acid deficiency.




Leucine is an essential amino acid, one of the three branched chain amino acids, ketogenic, its isomer is isoleucine. It affects the secretion of anabolic hormones (insulin, combined carbohydrates), acts on enzymes (mTOR) starting the process of muscle protein synthesis and controlling its course. Protein synthesis by leucine is affecting the development of bones, muscles and skin. It reduces the fat tissue. Without the availability of leucine, protein synthesis is impossible. It naturally occurs in animal products (such as eggs, meat, dairy and fish), plant origin, and as a post-training supplements, BCAA, EAA, no-boosters, creatine stacks, carbohydrate supplements. Ir is also in the form of mono-preparation supplements. It is one of the most important amino acids for the athlete's body, basically in every sports discipline.
Dosage: The demand is 5-10 g / 24h, dosage pre- and post-workout and in the morning after waking up.




Lysine belongs to the group of 9 essential amino acids delivered into the body from outside (with food or as a supplement) .It is a building substance of protein (the muscle protein). It is available in food of animal origin (meat, dairy products) and vegetable (legumes). It plays an important role in many physiological processes (absorption of calcium, production of enzymes, hormones and antibodies), and arginine is a component of supplements that increase the synthesis of growth hormone (HGH stimulators). In the form of hydroxylysine (a component of collagen) recommended for the treatment of sports injuries, and prevention. In the case of stress and excessive physical and psychological overloads, it is recommended due to the function of lowering cortisol levels. Also it applies in medicine, in the treatment of anxiety and herpes. The share of lysine intake of daily doses of amino acids should not exceed 5.1%. Available for purchase at
In the processes of digestion of protein matter, as a result of decarboxylation of lysine, may be converted into cadaverine (biogenic amine) having a strong toxicity.
Dosage: the lack of a well-defined standard daily intake of lysine. The supplementation dosages regularly used: with arginine 500 mg - 2g (before bedtime) pre- and post-workout optionally with other amino acids.



Exogenous methionine is an amino acid containing sulphur in its composition. It provides multi metabolism, with the indispensable help of vitamin B6. Participates in the synthesis of phospholipids (e.g. Lecithin), carnitine responsible for transport in the body of long-chain fatty acids, burned in the mitochondria cells (organelles in cells with a separate kernel), along with cystine forms cysteine. It is in the body antioxidant function. Natural source of acquisition of methionine are high-protein foods of animal origin (eggs, meat, fish), vegetable (sesame seeds, grain products). Available in all protein and carbohydrate protein and amino acid supplements such EAA and contain so-called all-day amino acids, supporting the liver preparations and cosmetics supporting the growth and condition of hair, skin and nails.




Phenylalanine (essential amino acid) is provided from the outside with food or synthetic products. Its source are the high-protein foods and supplements, concentrates: protein, amino acid and nutritional supplements for athletes. Precursor of tyrosine, thyroid hormones and neurotransmitters (adrenaline, noradrenaline, dopamine), phenylethylamines (neuromodulator) and melanin pigments of hair and skin. Essential for the proper functioning of the nervous system. It has analgesic, antidepressant, and is used as an additive to supplements with thermogenic and stimulating action. It is a component of aspartame.
Excess phenylalanine consumed by people with neurological problems, may reduce the availability of other essential amino acid tryptophan of nervous system and consequently lead to a reduction in serotonin and exacerbate the depression.



Threonine - essential amino acid, or synthesized from food or (and) in the form of supplements. It takes part in the production of new muscle proteins. It is essential for the proper formation of the immune system is maintained in good condition the skin, bones. It affects the normal development of the enamel of teeth and the digestive system by acting positively on the liver and gastric mucosa. It is essential to the proper functioning of the nervous system. On the Polish there are no threonine mono-preparations. Available in the form of blends of amino acids (e.g.the type of EAA) and natural protein supplements.
Deficiency of threonine can cause neurological disorders and increased depression.
Dosage: the lack of standards of daily demand threonine. Doses customarily used in the supplementation.



Tryptophan is one of the nine essential amino acids that require high protein food consumption, mono-preparation supplements tryptophan, an amino acid type and EAA-day nutrients and protein, which is essential in the process of protein synthesis. A derivative of 5-HTP in the decarboxylation is a precursor of serotonin ((tissue hormone having an effect on blood pressure and peristalsis), and the subsequent processes of melatonin (the hormone sleep). It is used for synthesis of nicotinic acid (niacin, known as vitamin PP). The due to the appetite suppressant is also used in certain weight loss formulations.
Even a small deficiency is dangerous for the course of many physiological processes, can cause the nervous system deterioration of mood, insomnia, and disturbances in the digestive process. Tryptophan deficiency in the long term leads to depression and neurological disorders.
Mono-preparation supplements of tryptophan are recommended as a means of reducing the stress and reducing the feeling of insomnia. A part of the nutritional supplements type of EAA and all-day aminoacids, it is a valuable component of protein supplements. Available in store
Doses recommended in supplementation: 500 - 2000 mg at bedtime, alternatively 500 - 1000 mg before meals.



Valine – is a branched essential amino acid, indispensible for the functioning of the nervous system (receiving of sensory information), involved in muscle protein synthesis and energy generation. Administration of additional doses of valine before exercise (or immediately after) has anti-catabolic effect, protecting the proteins and allowing them to rebuild. It is slightly stimulatory (delays symptoms of fatigue during workout), affecting the level and relations of neurotransmitters. It helps to protect the liver. It stimulates an increase in strength and muscle mass, participates in the reduction of body fat. BCAA, EAA, and other mixtures of amino acid supplementation, protein and protein supplements and carbohydrate-stacks, brings positive results in strength and endurance sports.
Valine deficiency can occur in case of increased energy needs of the body,
as the result of stress and too much stress load.




Copper - trace mineral that facilitates the introduction of iron into hemoglobin, allowing the correct functioning of antioxidant processes. It is an important component of enzymes that affect the processes of aerobic metabolism, carbohydrate metabolism and in the formation of collagen. With proper diet, do not use supplements containing copper, as an overdose can cause insomnia, hair loss. It occurs in foods such as legumes, offal, plums, seafood. Copper compounds must be used in a responsible way, because many of them have toxic properties.
Dosing: A sufficient amount of copper provides proper diet.




The iron part of the dye in the form of the heme (hemoglobin and myoglobin in meat), a non-haem (in plant), and enzymes responsible for transport and storage of oxygen in the body. It occurs in enzymes responsible for: the metabolism of fatty acids, prostaglandin biosynthesis, catabolism of tryptophan. The absorption of iron in plant is lower than in animal products. In plant foods, it is reduced by contained chemicals: phytates and oxalates, also calcium and high acidity (pH factor). Only 8% of the intake of iron is absorbed by the body and transported to the blood. For tts absorption is needed sufficient amount of: cobalt, manganese, copper and vitamin C. Iron itself is essential for the metabolism of B vitamins. Source of acquisition of iron are animal products (meat, organ meats, egg yolks) and plant products (whole grain bread, beans , cocoa, parsley, nuts, soy). Iron is also present in synthetic form as a component of vitamin-mineral and mineral and mono-preparation supplements, often enriched with vitamin C. Supplements containing iron compounds are recommended for athletes during intense training and those on a meatless diet (vegetarians and vegans).
Iron deficiency causes anaemia. Using a large amount of strong coffee or tea hinders the absorption of iron. Symptoms of iron deficiency are: insomnia, diarrhea, impaired body temperature, loss of papillae on the tongue, reduced exercise capacity, and reduced intellectual and psychological efficiency.
Excess iron reduces the absorption of other elements (e.g. zinc, copper), reduced immunity, causing tissue damage of some organs (kidney, liver, heart), increased risk of cancer.
Dosage: 3-12 mg per day.




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



Molybdenum (the element of the chromium groups, atomic no. 42, a chemical symbol Mo) - a trace element involved in the metabolic conversion of carbohydrates and fats and increases the absorption of iron. It is used to treat anaemia. Well affects the mood.. It is a component of many dietary supplements and in foods such as lettuce, cabbage and other leafy green vegetables, whole grains (corn, sunflower, etc.).

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