Introduction

Summer offers an unparalleled opportunity to reinvigorate your fitness regimen. The longer days and inviting weather beckon you outdoors, whether it’s hiking scenic trails, cycling, swimming, or playing your favorite sports. These activities demand peak physical performance, sustained energy, and fast recovery. Maintaining endurance and vitality becomes essential not just for performance but for overall enjoyment. Kirkman Supplements provides a scientifically grounded range of products designed to naturally bolster your fitness efforts and help you thrive all season long.

1. Mushroom Energy & Endurance 0847-120

Medicinal mushrooms have been treasured for centuries due to their powerful adaptogenic properties—meaning they help the body resist stress and maintain balance. Kirkman's Mushroom Energy & Endurance formula leverages the potent benefits of Reishi and Cordyceps militaris, two mushrooms with documented effects on vitality and stamina. Cordyceps militaris, in particular, has been studied for its ability to improve tolerance to high-intensity exercise, increasing time to exhaustion and maximal oxygen uptake (VO₂ max) within just three weeks of supplementation.¹

This formula doesn’t rely solely on mushrooms; it also includes Acetyl L-Carnitine HCl, an amino acid derivative essential for transporting fatty acids into mitochondria, where energy production occurs. L-Citrulline and Taurine enhance blood flow and reduce muscle fatigue, while Coenzyme Q10 supports mitochondrial energy synthesis at the cellular level. Together, these ingredients create a synergistic effect that supports prolonged physical exertion and faster recovery from fatigue, especially during demanding summer workouts. Whether you are training for a marathon or just enjoying an afternoon hike, this blend helps your body sustain energy naturally while combating oxidative stress and inflammation often triggered by intense activity.

2. Creatine 500 mg Hypoallergenic 0302-120

Creatine monohydrate is one of the most extensively researched supplements in sports nutrition, revered for its role in increasing muscle strength, power output, and recovery speed. Kirkman’s hypoallergenic creatine offers a pure, safe source free from common allergens, ideal for sensitive individuals. Contrary to common misconceptions, creatine does not cause harmful water retention or kidney damage, a conclusion supported by a comprehensive review of scientific literature which confirms its safety and efficacy across a wide range of populations.²

Creatine works by replenishing adenosine triphosphate (ATP), the energy currency used by muscles during high-intensity activities. This replenishment allows for more sustained bursts of power, whether during sprinting, weightlifting, or explosive sports. By facilitating faster recovery, creatine enables athletes to train harder and more frequently, driving gains in muscle mass and endurance. Additionally, creatine supplementation has been linked to cognitive benefits and reduced fatigue, making it a versatile choice for summer fitness routines that require both physical and mental sharpness.

3. TMG with Folic Acid and B12 0433-008

Trimethylglycine (TMG), also known as betaine, plays a crucial role in methylation pathways, biochemical processes that influence DNA repair, detoxification, and neurotransmitter production. Supplementing with TMG has been shown to enhance body composition by increasing lean muscle mass and reducing fat, as demonstrated in a double-blind study with collegiate female athletes.³ This makes it particularly useful for those looking to improve muscle endurance and power output during sustained physical activity.

By combining TMG with folic acid and vitamin B12, this product supports critical biochemical pathways that produce cellular energy and support cardiovascular health. Folic acid and B12 are key players in homocysteine metabolism, a process tied to heart disease risk. Supplementation helps optimize energy production within cells, reduces fatigue, and improves recovery after exercise. For active individuals, this means enhanced stamina and better overall health support throughout the long summer days, especially for those engaging in repeated bouts of moderate to high-intensity training.

4. B-Complex with Coenzymes (R5P, P5P) 0095-200

The B-vitamin complex is fundamental for converting food into usable energy, but many people suffer from suboptimal levels due to dietary insufficiencies or increased demands during exercise. Kirkman’s hypoallergenic B-complex delivers active coenzyme forms like methylcobalamin (B12), riboflavin-5-phosphate (B2), and pyridoxal-5-phosphate (B6), which are more bioavailable and immediately usable by the body. These forms bypass some of the conversion steps required by standard vitamins, making supplementation more efficient, especially in individuals with genetic polymorphisms that affect B-vitamin metabolism.

A randomized controlled trial demonstrated that supplementing with a B-complex significantly reduces fatigue and enhances physical performance after just 28 days.⁴ B vitamins also support nervous system function and red blood cell production, which are vital for oxygen delivery and endurance during exercise. This makes the formula an excellent daily support to reduce the tiredness often associated with intense summer workouts and to keep your nervous system resilient under stress.

5. Amino Support with Free Form Essential Amino Acids & AKG 0339-304

Essential amino acids (EAAs) are critical for muscle repair and synthesis, especially when consumed in their free-form state, which allows for rapid absorption. Kirkman's Amino Support includes a balanced mix of these EAAs along with alpha-ketoglutarate (AKG), an intermediate of the Krebs cycle pivotal for energy production. Research has shown that daily supplementation with EAAs can lower blood lactic acid and serum iron, two markers linked to fatigue and oxidative stress.⁵

The inclusion of AKG further supports cellular metabolism and nitrogen balance, helping the muscles recover more quickly after strenuous exercise and extending endurance capacity. This blend is especially beneficial for athletes and fitness enthusiasts who demand efficient recovery between training sessions during the summer months, facilitating more consistent performance gains without burnout or excessive muscle soreness.

6. WP Minerals 1371-090

Developed by Dr. David Berger, WP Minerals is a comprehensive blend formulated to address common dietary mineral deficiencies that can impair muscle function, hydration, and metabolic health. Essential minerals like magnesium, zinc, potassium, and calcium are critical for nerve impulse transmission, muscle contraction, and maintaining electrolyte balance—factors that directly influence exercise performance and recovery.

Magnesium, for example, participates in over 300 enzymatic reactions and helps prevent cramps and spasms. Zinc supports immune function and antioxidant defense, while potassium is crucial for proper muscle contractions and fluid balance. Supplementing with WP Minerals ensures your body has the foundational nutrients necessary to perform optimally and recover efficiently, especially during hot summer months when sweating increases mineral loss.

7. Alpha-Ketoglutaric Acid 300 mg Hypoallergenic 0235-100

Alpha-ketoglutarate (AKG) plays a central role in amino acid metabolism and energy transfer within the mitochondria. As a key intermediate in the Krebs cycle, AKG supports ATP production—the primary energy molecule in cells—and helps buffer ammonia and lactate accumulation during intense exercise. Research indicates that AKG supplementation can improve skeletal muscle health, reduce exercise-induced fatigue, and accelerate recovery.⁶

Since endogenous AKG levels naturally decline with age, supplementing can help maintain energy production and muscle function in both younger and older adults. Kirkman’s hypoallergenic, plant-based AKG is free from common allergens such as gluten and casein, making it suitable for individuals with sensitivities. By promoting more efficient energy metabolism and muscle repair, this supplement is ideal for summer fitness enthusiasts focused on endurance and reducing muscle soreness.

8. Ubiquinol Super CoQ10 100 mg 0940-060

Coenzyme Q10 is an essential component of the electron transport chain in mitochondria, where it facilitates cellular energy production. Kirkman’s Ubiquinol Super CoQ10 provides CoQ10 in its reduced, bioavailable form, ubiquinol, which is more efficiently absorbed and utilized by the body compared to standard ubiquinone. Levels of CoQ10 decline naturally with age and during periods of intense physical stress, potentially leading to reduced mitochondrial function and stamina.

Supplementation with ubiquinol supports cardiovascular health and enhances cellular energy, key factors in sustaining prolonged physical activity.¹ Athletes and active individuals can benefit from improved heart function, reduced oxidative stress, and faster recovery times. This makes ubiquinol an essential supplement to help you maintain peak performance throughout the summer fitness season.

9. Cod Liver Oil Liquid: Natural Lemon Lime Flavor 0228-008

Kirkman’s Cod Liver Oil Liquid is a powerful ally for fitness enthusiasts looking to enhance recovery and resilience. Rich in omega-3 fatty acids (EPA and DHA), it helps reduce post-workout inflammation, easing muscle soreness and supporting joint flexibility after intense training. The added vitamins A and D bolster immune health and improve calcium absorption, which is vital for bone strength during consistent physical activity.

This ultra-pure formula is vacuum-dried, deodorized, and filtered to remove heavy metals, pesticides, and PCBs — making it one of the cleanest options on the market. With a smooth lemon-lime flavor, it’s a pleasant addition to any recovery stack. Free from common allergens, gluten, and casein, Kirkman’s Cod Liver Oil Liquid delivers clean, efficient support for athletes and active individuals prioritizing faster recovery and long-term performance.

Conclusion

Embrace the energy and potential of summer with Kirkman Supplements. This carefully formulated range combines natural, clinically supported ingredients designed to boost endurance, improve muscle function, reduce fatigue, and enhance overall vitality. Whether you’re training for a competition or enjoying outdoor activities, Kirkman’s supplements provide the scientific support you need to stay energized, strong, and healthy throughout the season.

Protocol: How to Incorporate Kirkman Supplements Into Your Summer Routine

For optimal results, consistency is key. Kirkman's supplements are best used as part of a daily fitness and recovery regimen. Below is a suggested protocol to help you get the most from each formula based on your activity level and recovery needs:

Morning Routine (Energy, Focus & Foundational Support)

B-Complex with Coenzymes: Take with breakfast to jump-start cellular energy production and maintain mental clarity.
Women's Multivitamin, Men's Multivitamin or WP Minerals: Provides a baseline of essential nutrients; take with food to support daily vitality and hydration balance.
TMG with Folic Acid and B12: Supports detox and methylation pathways; ideal in the morning to align with the body’s natural detox cycle.

Pre-Workout (Performance & Stamina)

Mushroom Energy & Endurance: Take 30–60 minutes before activity for stamina, oxygen utilization, and stress resilience.
Creatine 500 mg: Best taken daily, with or without exercise; ideal 30 minutes before strength or high intensity interval training (HIIT).

Post-Workout (Recovery & Repair)

Amino Support with Free Form EAAs & AKG: Take immediately post-exercise to speed up muscle repair and reduce soreness.
Alpha-Ketoglutaric Acid (AKG): Stack with amino acids post-workout to reduce lactic acid and support faster mitochondrial recovery.
Cod Liver Oil Liquid: Take with a post-workout meal to lower inflammation, support joints, and restore healthy fats.

Evening Routine (Recovery & Resilience)

Ubiquinol Super CoQ10: Take with a dinner meal containing fat or oil to support cellular repair and nighttime mitochondrial energy production.
Additional WP Minerals (if not taken in AM): Helpful in the evening to replace electrolytes lost through sweating and restore muscle balance.

Hydration Tip: Always pair supplement intake with adequate water to support absorption and electrolyte balance—especially in summer heat.

References

Hirsch, K. R., et al. "Cordyceps Militaris Improves Tolerance to High-Intensity Exercise After Acute and Chronic Supplementation." Journal of Dietary Supplements, vol. 14, no. 1, 2017, pp. 42–53. https://doi.org/10.1080/19390211.2016.1203386.
Antonio, J., et al. "Common Questions and Misconceptions about Creatine Supplementation: What Does the Scientific Evidence Really Show?" Journal of the International Society of Sports Nutrition, vol. 18, no. 1, 2021. https://doi.org/10.1186/s12970-021-00412-w.
Cholewa, Jason M., et al. "The Effects of Chronic Betaine Supplementation on Body Composition and Performance in Collegiate Females: A Double-Blind, Randomized, Placebo Controlled Trial." Journal of the International Society of Sports Nutrition, vol. 15, no. 1, 2018, article 39. https://pmc.ncbi.nlm.nih.gov/articles/PMC6069865/.
Lee, M. C., et al. "A Functional Evaluation of Anti-Fatigue and Exercise Performance Improvement Following Vitamin B Complex Supplementation in Healthy Humans: A Randomized Double-Blind Trial." International Journal of Medical Sciences, vol. 20, no. 10, 2023, pp. 1272–1281. https://doi.org/10.7150/ijms.86738.
Ohtani, Masaru, Masaaki Sugita, and Kimiaki Maruyama. "Amino Acid Mixture Improves Training Efficiency in Athletes." The Journal of Nutrition, vol. 136, no. 2, 2006, pp. 538S–543S. https://doi.org/10.1093/jn/136.2.538S.
Xu, Miaomiao, et al. "Impact of Alpha-Ketoglutarate on Skeletal Muscle Health and Exercise Performance: A Narrative Review." Nutrients, vol. 16, no. 22, 2024, article 3968. https://doi.org/10.3390/nu16223968.

Elevate Your Summer Fitness with Kirkman® Supplements