The science behind the products

Raw material quality and digestibility

The Science Behind Protocol S8

Medical studies show that after several months of taking these ingredients, the body not only increases their bioavailability but also maintains these values long-term.

Modern medicine views the body as a system, not as a collection of separate functions. The protocol was created precisely on this basis – not as a randomly assembled set of ingredients, but as a functional protocol that supports the body holistically: from hydration and energy during the day to complete recovery in the evening.

Scientific research:
https://pmc.ncbi.nlm.nih.gov/articles/PMC12157762/

In scientific and sports practice, it has been established that the combined intake of electrolytes, minerals, and functional nutrients leads to better results than isolated intake. Electrolyte balance, neuromuscular function, and energy metabolism are interconnected processes that reinforce each other.

Scientific Research:Nutrient synergy: definition, evidence, and future directions

Scientific data shows that hydration, electrolyte balance, and the nervous system are closely linked. An imbalance in one element negatively affects neuromuscular conduction and energy levels. Protocol S8 addresses these factors as a unified system for maximum efficiency.

Scientific study: https://pmc.ncbi.nlm.nih.gov/articles/PMC12634520/

The effectiveness of micronutrients depends on precise dosage and form. Doses that are too low have no effect, while excessive doses can cause discomfort. Our formulas are calibrated for optimal absorption and long-term support without overburdening the body.

Scientific research: https://www.healthline.com/nutrition/zinc-supplements

Synergy and Ingredients' Action

Vitamins and Metabolic Balance

Modern science identifies hundreds of benefits from the correct balance of mineral and vitamin levels in the human body. The optimal quantities in our products guarantee the exact levels you need for a healthy lifestyle.

An analysis of 16 clinical studies confirms that B-complex (B1, B3, B5, B6, B12) significantly improves stress resistance and mood by optimizing energy metabolism in cells.

Scientific study:
https://pmc.ncbi.nlm.nih.gov/articles/PMC4846521/#:~:text=The%20earliest%20and%20perhaps%20best,AD%20patients%20and%20by%20thiamine

A University of Reading study (2022) links high doses of vitamin B6 to increased production of GABA – the main calming neurotransmitter, leading to a noticeable reduction in anxiety and depressive symptoms.

Research:
https://www.reading.ac.uk/news/2022/Research-News/Vitamin-B6-could-reduce-anxiety-and-depression#:~:text=%E2%80%9CVitamin%20B6%20helps%20the%20body,%E2%80%9D

Myo-inositol (B8) serves as a key second messenger for insulin and thyroid hormones. It improves insulin sensitivity and normalizes metabolic processes, supporting cellular signaling.

Scientific research:
https://pmc.ncbi.nlm.nih.gov/articles/PMC5655679/#:~:text=Myo,23

A medical review (2017) concludes that the combined intake of D3 and K2 is more effective for bone density and heart health than their individual intake, by directing calcium correctly and preventing arterial calcification.

Scientific research:
https://www.mdpi.com/2072-6643/16/15/2420#:~:text=dietary%20adequacy%20of%20vitamin%20K,in%20bone%20health%20is%20needed

Reducing cortisol and stress levels

Magnesium and the Nervous System

Science has long studied the different levels of absorbability and action of magnesium forms. We have chosen the three most proven forms and combined them into a unique product.

A study by the University of Baghdad (2024) shows that magnesium taurate intake significantly lowers blood pressure and cortisol levels (the stress hormone). This form improves mineral balance, supporting the cardiovascular and nervous systems.

Scientific research:
https://jcopew.uobaghdad.edu.iq/journal/vol23/iss1/13/#:~:text=by%20using%20electrolyte%20analyzer%20,a%20significant%20reduction%20in%20serum

Scientists from Leibniz University (2025) prove that magnesium bisglycinate significantly improves sleep quality and reduces insomnia (ISI index). This is one of the most gentle and bioavailable forms for calming the nervous system in the evening.
Scientific study:
https://pmc.ncbi.nlm.nih.gov/articles/PMC12412596/#:~:text=The%20magnesium%20bisglycinate%20group%20showed,observed%20in%20other%20psychological%20outcomes

Italian researchers (2024) found that magnesium citrate reduces muscle soreness and protects cells from damage after intense exercise, improving overall athletic performance.

Scientific study:
https://pmc.ncbi.nlm.nih.gov/articles/PMC11227245/#:~:text=These%20studies%20showed%20that%20MgS,protective%20effect%20on%20muscle%20damage

Nutrient Density Equivalent %

Immune support and minerals

Modern industry has changed the main sources of vitamins and minerals - food and drinks. Increasing amounts of preservatives and decreasing bioavailability of beneficial substances lead to a decline in the body. Therefore, support with optimal intake in the form of food supplements improves the quality of life.

Studies show a dual benefit from zinc: a Cochrane review (2023) confirms the shortening of viral symptoms, while Japanese research (2010) proves that zinc reduces feelings of anger and improves emotional status.

Scientific research:
https://pmc.ncbi.nlm.nih.gov/articles/PMC2277319/#:~:text=Zinc%20affects%20multiple%20aspects%20of,induced%20injury%20during%20inflammatory%20processes

Selenium is critical for the conversion of T4 hormones into T3. Clinical data shows that it significantly lowers antibodies in Hashimoto's (anti-TPO), reducing inflammation in the thyroid gland.

Scientific research:
https://pmc.ncbi.nlm.nih.gov/articles/PMC11939285/#:~:text=Selenium%20plays%20an%20indispensable%20role,care%20units%20and%20higher%20mortality

Vitamin A is vital for immunity and vision, while Vitamin E protects cell membranes from oxidative stress and improves the immune response in the elderly.

Scientific research:
https://pmc.ncbi.nlm.nih.gov/articles/PMC11891505/#:~:text=Vitamin%20E%2C%20primarily%20in%20its,balance%2C%20as%20Vitamin%20E%27s%20beneficial

Reduce muscle pain and discomfort by up to -40%

Amino acids, herbs, and adaptogens

Natural extracts can significantly aid recovery from sports or a busy daily life. The most important of these are included in the products from the S8 protocol!

Description: A University of Cordoba study (2010) found that citrulline malate increased anaerobic endurance by ~50% and reduced muscle soreness by ~40% within 48 hours of exercise.

Scientific Research:
https://pubmed.ncbi.nlm.nih.gov/20386132/#:~:text=the%20number%20of%20sets%2C%20achieving,Thus%2C%20athletes%20undergoing%20intensive%20preparation

Description: A 2021 review classified Siberian ginseng as a safe adaptogen that improves cognitive function and endurance, helping the body cope with physical and mental stress.

Scientific research:
https://pmc.ncbi.nlm.nih.gov/articles/PMC12195798/#:~:text=This%20comprehensive%20review%20focuses%20on,which%20contribute%20to%20health%20benefits

Description: The active ingredient ecdysterone supports protein synthesis and the increase of muscle mass naturally, without affecting the hormonal balance, acting as a powerful anabolic agent.

Scientific study:
https://pubmed.ncbi.nlm.nih.gov/31123801

Description: Glycine improves sleep architecture and the feeling of being well-rested, while L-glutamine is essential for muscle recovery and immune function during periods of stress.

Scientific research:
https://pubmed.ncbi.nlm.nih.gov/21206303/

Electrolytes and hydration

Description: Research shows that electrolyte solutions retain fluids more effectively than water and prevent muscle cramps. Potassium and calcium in citrate form ensure optimal neuromuscular conduction.

Scientific study:
https://pmc.ncbi.nlm.nih.gov/articles/PMC8803723

Description: Taurine acts as an osmoregulator and improves endurance, while Vitamin C protects cells from oxidative stress during intense sports.

Scientific study:
https://pubmed.ncbi.nlm.nih.gov/33657361

Description: The active ingredient ecdysterone supports protein synthesis and the increase of muscle mass naturally, without affecting hormonal balance, acting as a powerful anabolic agent.

Scientific study:
https://pubmed.ncbi.nlm.nih.gov/31123801

Description: Glycine improves sleep architecture and the feeling of being well-rested, while L-glutamine is essential for muscle recovery and immune function during periods of stress.

Scientific study:
https://pubmed.ncbi.nlm.nih.gov/21206303/

Dr. Dimitar Yanev

"When the ingredients are combined correctly and their quantities are optimal - one product can replace dozens of others. In this case, 3 sachets a day are enough for any purpose and need!"

Dr. Julia Stoeva

"Stoitchkov Nutrition relies on highly absorbable formulas. This is important for people who are looking for a sustainable approach. Products that are sure to improve the quality of life!"

Iliyan Naydenov

"The products are practical and convenient for an active lifestyle. I like that they are adapted to people's real daily lives. Whether you're traveling, working, or exercising - it's always convenient to have a dose at hand."

Pavlin Marinov

"The market has long needed products that are suitable for everyone - from teenagers to the elderly. This is what distinguishes quality and safety from the mediocre!"

Krasi Balakov

"I'm impressed by the focus on quality and control. This is the foundation of trust in any brand. These 3 key products replace over 10 other food supplements, and that saves a lot!"

Created to improve the quality of life!

Laboratory tested

Each formula undergoes laboratory control to ensure quality and purity in every batch.

Certified products

Production meets established safety and control standards. Products are certified according to ISO, SGS, and HACCP.

GMO and Preservative Free

Focus on clean formulas, free from genetically modified ingredients and unnecessary preservatives.

Fast absorption

The formulas are designed to dissolve easily and to be gentle on the stomach and intestines.

Vegan products

All products are entirely compliant with vegetarian and vegan dietary preferences.

Proven results

Recipes with precise quantities of synergistic ingredients for maximum results, without excess.

Stoitchkov Nutrition's S8 Protocol is not just a collection of ingredients, but a scientifically proven system for optimization. Every element – from the magnesium matrix to the adaptogens – has been selected based on clinical data for synergy, bioavailability, and real results. This is the care that supports your body every day, long-term and without compromise.

Get the S8 package