Benefits of Muscle¹ & Recovery² Card

Key Findings

• Magnesium supplementation may help reduce post-exercise muscle soreness and inflammatory responses, including interleukin-6, while supporting glucose recovery, muscle strength, and normal neuromuscular function [1][2][3].
• Taurine supplementation has been associated with improvements in aerobic and anaerobic performance, reduced concentrations of muscle-damage markers such as creatine kinase and lactate, less muscle soreness, and faster recovery after exercise. Acute or short-term doses of approximately 1–3 g per day have shown potential benefits in several studies [4][5][6][7].
• Flavonoid-containing polyphenols, including compounds found in citrus bioflavonoids, grape seed extract, and pine bark extract, may support recovery after exercise-induced muscle damage. A meta-analysis reported a 7.14% improvement in muscle strength recovery and a 4.12% reduction in muscle soreness during the 96 hours following exercise [9].

Introduction

Strenuous physical activity can temporarily reduce muscle function and lead to soreness, fatigue, oxidative stress, and inflammatory responses. Effective recovery depends on several physiological processes, including energy production, muscle contraction, electrolyte balance, mitochondrial function, antioxidant defence, and tissue repair.

Adequate intake of vitamins, minerals, amino acids, and plant-derived bioactive compounds may support these processes and contribute to normal muscle function and post-exercise recovery [2][8][10].

The Muscle¹ & Recovery² Card combines magnesium bisglycinate, magnesium citrate, taurine, vitamin D3, vitamin C, vitamin E, vitamin B6, vitamin B12, beta-carotene, biotin, selenium, Vaccinium myrtillus extract, citrus bioflavonoids, Viola tricolor extract, grape seed extract, and pine bark extract. This report reviews the available scientific evidence supporting the potential contribution of these ingredients to muscle function, exercise performance, antioxidant protection, and recovery after physical activity.

Main Text

Magnesium and Muscle Function

Magnesium is an essential mineral involved in hundreds of biochemical reactions, including energy production, protein synthesis, electrolyte balance, nerve transmission, and muscle contraction. Maintaining adequate magnesium status is therefore important for skeletal muscle integrity, neuromuscular function, and physical performance [2][10].

A randomized controlled trial involving nine male recreational runners evaluated the effect of 500 mg of magnesium per day for seven days before a 10 km downhill running time trial.

Compared with placebo, magnesium supplementation significantly reduced the post-exercise interleukin-6 response. Mean IL-6 concentrations were:

• 1.36 ± 0.66 pg/mL in the magnesium group, and
• 2.06 ± 1.14 pg/mL in the placebo group.

Participants receiving magnesium also reported less muscle soreness and demonstrated improved post-exercise blood glucose recovery [1].

These findings suggest that short-term magnesium supplementation may help moderate selected inflammatory responses and support metabolic recovery following strenuous eccentric exercise.

A broader scoping review concluded that magnesium is important for skeletal muscle health and may support:

• muscle mass,
• muscle strength,
• respiratory muscle function,
• exercise recovery, and
• reductions in soreness and inflammation.

The reported benefits were observed across studies involving athletes, older adults, and patients with neuromuscular or metabolic conditions [2].

An in vitro study using C2C12 skeletal muscle cells also evaluated a combination of magnesium bisglycinate, potassium citrate, vitamin D3, and curcumin. The combination improved mitochondrial activity, ATP production, and oxygen consumption while helping regulate excessive muscle-cell contraction [11].

Although cell-culture research cannot be directly translated into clinical outcomes, these findings provide mechanistic support for combining magnesium with nutrients involved in energy metabolism and muscle function.

Taurine and Exercise Recovery

Taurine is a sulfur-containing beta-amino acid found in high concentrations in skeletal muscle. It is involved in calcium regulation, cell hydration, membrane stability, antioxidant defence, energy metabolism, and muscle contraction [4][5].

A review of 19 peer-reviewed studies examined taurine supplementation in relation to exercise performance and recovery. Most studies used doses of approximately 1–3 g per day, administered either:

• over a short period of 6–15 days, or
• acutely 1–3 hours before exercise.

The review found that taurine may support:

• aerobic performance and time to exhaustion,
• anaerobic strength and power,
• recovery from delayed-onset muscle soreness,
• reductions in creatine kinase,
• reductions in blood lactate, and
• improved metabolic responses after exercise [4].

A blinded, randomized, crossover study involving ten recreationally active men investigated taurine supplementation at 0.1 g per kilogram of body weight per day for 72 hours after eccentric exercise.

The results suggested that taurine may improve the recovery of eccentric muscle performance in the biceps brachii following exercise-induced muscle damage [6].

Another study involving 21 young men examined taurine supplementation for 14 days. Following eccentric exercise, participants receiving taurine demonstrated:

• improved strength recovery,
• reduced muscle soreness,
• lower lactate dehydrogenase activity,
• lower creatine kinase activity, and
• reduced oxidative damage [7].

Additional research supports a potential role for taurine in reducing exercise-induced fatigue and helping restore normal muscle function after strenuous physical activity [5].

Although the findings are promising, the effects of taurine may vary according to dosage, timing, exercise type, training status, and duration of supplementation.

Antioxidants and Flavonoids in Recovery

Strenuous exercise increases oxygen consumption and can temporarily increase the production of reactive oxygen species. Although moderate oxidative signalling is part of normal adaptation to exercise, excessive oxidative stress may contribute to muscle soreness, inflammation, and temporary reductions in muscle function [8][13].

The Muscle¹ & Recovery² Card contains several antioxidant nutrients and plant-derived compounds, including:

• vitamin C,
• vitamin E,
• beta-carotene,
• selenium,
• Vaccinium myrtillus extract,
• citrus bioflavonoids,
• Viola tricolor extract,
• grape seed extract, and
• pine bark extract.

These compounds may provide complementary support by helping protect cells against oxidative stress and by modulating inflammatory responses associated with strenuous exercise.

A systematic review and meta-analysis of 26 randomized, placebo-controlled trials evaluated flavonoid-containing polyphenols following exercise-induced muscle damage.

Compared with placebo, polyphenol supplementation was associated with:

• a 7.14% improvement in muscle strength recovery, and
• a 4.12% reduction in muscle soreness

during the 96-hour recovery period following exercise [9].

These findings suggest that flavonoid-rich ingredients may support short-term recovery of muscle function and comfort after demanding physical activity.

A systematic review of antioxidant supplementation also found that certain antioxidant strategies may reduce selected markers of oxidative stress and muscle damage, although the results varied considerably depending on the nutrient, dosage, exercise protocol, and participant characteristics [8].

Research involving elite football players reported that a combination of 500 mg vitamin C and 1,200 IU vitamin E per day reduced oxidative stress and was associated with lower injury rates [3].

However, high-dose antioxidant supplementation should be interpreted cautiously. Oxidative signalling plays a role in normal training adaptation, and excessive antioxidant intake may potentially interfere with some beneficial responses to exercise. The balance between supporting recovery and preserving normal physiological adaptation is therefore important [8][13].

Vitamins Supporting Muscle Function and Energy Metabolism

Several vitamins included in the Muscle¹ & Recovery² Card contribute to normal physiological processes relevant to exercise and recovery.

Vitamin D3

Vitamin D contributes to the maintenance of normal muscle function. Vitamin D receptors are present in skeletal muscle, and adequate vitamin D status is associated with normal muscle contraction, strength, and physical performance.

The in vitro study combining vitamin D3 with magnesium, potassium, and curcumin found improvements in mitochondrial function and muscle-cell energy production, although clinical research is required to confirm these effects in humans [11].

Vitamins B6 and B12

Vitamin B6 and vitamin B12 contribute to normal energy-yielding metabolism and normal functioning of the nervous system.

Vitamin B6 also contributes to normal protein and glycogen metabolism, while vitamin B12 contributes to normal red blood cell formation and the reduction of tiredness and fatigue.

These roles may be relevant during exercise recovery, when energy production, protein turnover, and oxygen transport are particularly important.

Vitamin C

Vitamin C contributes to normal energy-yielding metabolism, normal immune function, and protection of cells from oxidative stress. It also contributes to normal collagen formation, which is important for connective tissues such as tendons, ligaments, cartilage, and blood vessels.

Vitamin E and Selenium

Vitamin E and selenium contribute to the protection of cells from oxidative stress. Their inclusion may complement the plant-derived antioxidants in the formulation.

However, the available literature does not specifically evaluate the complete combination of vitamin E, selenium, beta-carotene, and botanical extracts used in the Muscle¹ & Recovery² Card.

Plant Extracts and Additional Ingredients

The formulation also contains Vaccinium myrtillus, Viola tricolor, grape seed extract, pine bark extract, and citrus bioflavonoids.

Grape seed and pine bark extracts are rich in polyphenolic compounds, including proanthocyanidins. Citrus bioflavonoids also contain flavonoids with antioxidant properties.

The meta-analysis of flavonoid-containing polyphenols supports the broader potential of this ingredient category for improving strength recovery and reducing soreness after exercise-induced muscle damage [9].

However, the reviewed studies did not directly evaluate the exact combination or doses of these extracts contained in the Muscle¹ & Recovery² Card. Therefore, the observed benefits of flavonoids as a broader category cannot automatically be attributed to the complete product formulation.

The available literature also provides limited formulation-specific evidence for Vaccinium myrtillus, Viola tricolor, beta-carotene, biotin, and selenium in relation to post-exercise muscle recovery.

Limitations and Considerations

The available evidence supports potential roles for magnesium, taurine, antioxidant nutrients, and flavonoid-containing polyphenols in muscle function and post-exercise recovery. However, several limitations should be considered.

Many of the cited studies involved small participant groups, short supplementation periods, or specific exercise protocols. Outcomes may therefore differ according to:

• training status,
• exercise intensity,
• age,
• baseline nutritional status,
• dose,
• timing of supplementation, and
• duration of use.

Some findings were obtained from in vitro or animal research and cannot be directly applied to human performance or recovery.

The complete combination of ingredients in the Muscle¹ & Recovery² Card has not been directly evaluated in a dedicated clinical trial. Conclusions regarding the full formulation are therefore based on studies of individual ingredients or related nutrient combinations.

Supplementation should complement adequate dietary intake, hydration, sleep, appropriate training load, and sufficient recovery time. It should not replace medical evaluation when muscle pain, weakness, or impaired recovery is persistent or severe.

Conclusion

The available scientific literature supports the potential contribution of several ingredients included in the Muscle¹ & Recovery² Card to normal muscle function, exercise performance, and recovery after physical activity.

Magnesium plays an essential role in energy production, neuromuscular activity, and muscle contraction. Clinical research suggests that short-term magnesium supplementation may reduce muscle soreness and selected inflammatory responses while supporting glucose recovery after strenuous exercise [1][2].

Taurine may contribute to aerobic and anaerobic performance, reduce muscle-damage markers, support strength recovery, and decrease delayed-onset muscle soreness. Studies using short-term doses of approximately 1–3 g per day have reported promising results, although outcomes vary according to the exercise protocol and supplementation strategy [4][5][6][7].

Flavonoid-containing polyphenols may provide additional recovery support. A meta-analysis of 26 randomized trials found a 7.14% improvement in muscle strength recovery and a 4.12% reduction in muscle soreness during the first 96 hours after exercise-induced muscle damage [9].

The formulation also provides vitamins and minerals involved in normal muscle function, energy metabolism, collagen formation, nervous system function, and antioxidant protection, including vitamin D3, vitamin C, vitamin E, vitamin B6, vitamin B12, selenium, and magnesium.

Although the complete Muscle¹ & Recovery² Card formulation has not been studied as a single regimen, the available evidence for its individual ingredients suggests complementary roles in supporting normal muscle activity, reducing post-exercise discomfort, protecting cells against oxidative stress, and promoting recovery after strenuous physical activity.

References

1. CJ Steward et al. One Week of Magnesium Supplementation Lowers IL-6, Muscle Soreness and Increases Post-Exercise Blood Glucose in Response to Downhill Running. European Journal of Applied Physiology (2019). https://pubmed.ncbi.nlm.nih.gov/31624951/
2. S Liguori et al. Role of Magnesium in Skeletal Muscle Health and Neuromuscular Diseases: A Scoping Review. International Journal of Molecular Sciences (2024). https://pubmed.ncbi.nlm.nih.gov/39457008/
3. Haniel Fernandes et al. Recovery Supplementation Strategies Applied to Elite Soccer Players. Journal of Clinical and Biomedical Investigation (2024). https://respubjournals.com/clinical-biomedical-investigation/Recovery-Supplementation-Strategies-Applied-to-Elite-Soccer-Players.php
4. JA Kurtz et al. Taurine in Sports and Exercise. Journal of the International Society of Sports Nutrition (2021). https://pubmed.ncbi.nlm.nih.gov/34039357/
5. Yumiko Takahashi et al. Effects of Taurine Administration on Exercise-Induced Fatigue and Recovery. The Journal of Physical Fitness and Sports Medicine (2017). https://www.jstage.jst.go.jp/article/jpfsm/6/1/6_33/_article
6. Y McLeay et al. The Effect of Taurine on the Recovery from Eccentric Exercise-Induced Muscle Damage in Males. Antioxidants (2017). https://pubmed.ncbi.nlm.nih.gov/29039798/
7. LA da Silva et al. Effects of Taurine Supplementation Following Eccentric Exercise in Young Adults. Applied Physiology, Nutrition, and Metabolism (2014). https://pubmed.ncbi.nlm.nih.gov/24383513/
8. C Canals-Garzón et al. Effect of Antioxidant Supplementation on Markers of Oxidative Stress and Muscle Damage after Strength Exercise: A Systematic Review. International Journal of Environmental Research and Public Health (2022). https://pubmed.ncbi.nlm.nih.gov/35162826/
9. CC Carey et al. Flavonoid-Containing Polyphenol Consumption and Recovery from Exercise-Induced Muscle Damage: A Systematic Review and Meta-Analysis. Sports Medicine (2021). https://pubmed.ncbi.nlm.nih.gov/33687663/
10. ACR Souza et al. The Integral Role of Magnesium in Muscle Integrity and Aging: A Comprehensive Review. Nutrients (2023). https://pubmed.ncbi.nlm.nih.gov/38140385/
11. C Molinari et al. Preventing C2C12 Muscular Cell Damage by Combining Magnesium and Potassium with Vitamin D3 and Curcumin. Journal of Traditional and Complementary Medicine (2021). https://pubmed.ncbi.nlm.nih.gov/34765517/
12. Mohammad Samadi et al. Micronutrient Crosstalk with Skeletal Muscle during Exercise: A Review of Synergistic Interactions. SHILAP Revista de Lepidopterología (2025). https://doaj.org/article/484d3c24e71a4303a3f1b3fec059e207
13. Y Tanabe et al. Dietary Supplementation for Attenuating Exercise-Induced Muscle Damage and Delayed-Onset Muscle Soreness in Humans. Nutrients (2022). https://pubmed.ncbi.nlm.nih.gov/35010943/