Best Ca-AKG Supplements (2026) – Top 10 Reviewed
Calcium alpha-ketoglutarate (Ca-AKG) has emerged as one of the most promising longevity compounds in recent research, with studies showing its potential to support cellular energy production, bone health, and healthy aging. If you’re looking to add this powerful supplement to your wellness routine, you’ll find several high-quality options that deliver effective doses with superior bioavailability.
Our Top Picks at a Glance
- Best Overall: Toniiq Ultra High Purity Ca-AKG — 99%+ purity with 1500mg per serving
- Best Value: ProHealth Ca-AKG — 1000mg per serving at affordable price
- Best Premium: Rejuvant Men’s AKG — 98% purity with controlled-release technology
Quick Comparison
| Product | Key Ingredients | Form | Servings | Best For |
|---|---|---|---|---|
| Toniiq Ultra High Purity Ca-AKG | 1500mg Ca-AKG (99%+ purity) | Capsules | 40 | Maximum purity |
| ProHealth Ca-AKG | 1000mg Ca-AKG, 200mg Calcium | Capsules | 30 | Overall use |
| Rejuvant Men’s AKG | 1000mg Ca-AKG (98%), B Vitamins | Capsules | 60 | Men’s longevity |
| AJAXERRUE Liposomal Ca-AKG | 1500mg Ca-AKG (Liposomal) | Softgels | 80 | Enhanced absorption |
| LongJuvity Time Release AKG | 1000mg Ca-AKG, Piperine | Enteric Capsules | 30 | Extended release |
| SMNutrition AAKG | 1100mg AAKG, 100mg Vitamin C | Capsules | 60 | Athletic performance |
| Maxx Herb Calcium AKG Powder | 1500mg Ca-AKG | Powder | 67 | Custom dosing |
1. Toniiq Ultra High Purity Ca-AKG — Best Overall
- The Highly Purified Form of Ca AKG - Toniiq Ca AKG brings some of the most purified Calcium Alpha-Ketoglutarate on the market. Our AKG supplement contains a third-party tested minimum 1500mg formula. Higher purity and a higher dosage means more of the active compounds in each serving that give Ca AKG its powerful properties.
- Highly Purified and Bioavailable - Calcium AKG has amazing health benefits, but purity and absorption have always been a major challenge; something most other Calcium AKG supplements don’t provide as it requires an extra step (and expense) in the manufacturing process. At a 99%+ purity level, Toniiq Ca AKG provides some of the purest, most potent Calcium Alpha-Ketoglutarate available.
- Setting a New Standard for Purity - To ensure that you are getting the highest-quality supplements, each batch is tested for quality and purity both during and after manufacturing.
- Quality, First, and Foremost - Toniiq products are produced in a GMP-certified, state-of-the-art manufacturing facility right here in the USA.
- Each Batch is Individually Tested - We test each batch of our supplements both ourselves and through a third-party independent laboratory to ensure our ingredients contain the correct standardized level of purity and active ingredients. We also test each batch for any possible additives, contaminants, and impurities to ensure the highest level of quality.
Toniiq sets the gold standard for Ca-AKG supplementation with an impressive 99%+ purity level that surpasses most competitors.
Each serving delivers 1500mg of calcium alpha-ketoglutarate, using a third-party tested formula that ensures maximum potency and bioavailability. The ultra-pure formulation means you’re getting more of the active compounds that give Ca-AKG its powerful longevity-supporting properties.
What We Like
- Industry-leading 99%+ purity for maximum effectiveness
- High 1500mg dose per serving for optimal results
- Third-party tested for quality assurance
- Manufactured in GMP-certified facilities
What Could Be Better
- Higher price point than some alternatives
- Requires 3 capsules per serving
Bottom Line: If you want the purest, most potent Ca-AKG supplement available, Toniiq delivers exceptional quality backed by rigorous testing.
2. ProHealth Ca-AKG — Best Value
- ACTIVATE YOUR CELLULAR ENERGY BALANCE: Support healthy aging with Ca-AKG, which activates the AMPK pathway. This pathway is crucial for maintaining the function of your cells' energy powerhouses, the mitochondria, ensuring optimal energy balance within your cells.
- QUALITY YOU CAN TRUST SINCE 1988 – Proudly manufactured in the USA and triple-tested for purity and potency. Every batch is verified by independent third-party labs, with full results published online for complete transparency and your peace of mind.
- THIS HOLIDAY SEASON, GIVE THE GIFT OF HEALTH – ProHealth’s science-backed supplements make a meaningful Christmas present for loved ones focused on longevity, energy, and well-being.
ProHealth offers an excellent balance of quality and affordability with a straightforward 1000mg Ca-AKG formula.
This supplement provides 200mg of elemental calcium alongside 1000mg of calcium alpha-ketoglutarate per two-capsule serving. The clean formulation uses minimal inactive ingredients including rice flour and vegetable cellulose, making it suitable for various dietary preferences.
What We Like
- Competitive pricing for quality Ca-AKG
- Clean formula with minimal fillers
- Provides 15% daily value of calcium
- Easy two-capsule serving size
What Could Be Better
- Only 30 servings per bottle
- Standard bioavailability without enhancement technology
Bottom Line: ProHealth delivers reliable Ca-AKG supplementation at an accessible price point, perfect for those starting their longevity journey.
3. Rejuvant Men’s AKG — Best Premium
- Ultra-Pure Ca-AKG Formula – Contains over 98% pure Calcium Alpha-Ketoglutarate, providing clean and consistent support for healthy aging.
- Controlled-Release Delivery – Designed to release gradually for steady absorption and sustained cellular energy support throughout the day.
- Longevity-Informed Formulation – Developed in collaboration with leading aging researchers using clinically studied AKG science to support overall wellness.
- Optimized Men’s Daily Wellness - Formulated to support cellular energy, metabolism, and recovery needs that matter to active men, helping you stay consistent with training and everyday performance.
- GMP-Certified Quality – Produced in a third‑party audited GMP-compliant facility and tested for purity, potency, and safety.
Developed in collaboration with Dr. Brian Kennedy at The Buck Institute for Research on Aging, Rejuvant represents cutting-edge longevity science.
This premium formula features 98% pure calcium alpha-ketoglutarate with patented controlled-release technology that extends nutrient absorption throughout the day. Enhanced with essential B vitamins including methylfolate and B12, it supports DNA repair and cellular energy production specifically optimized for men’s physiology.
What We Like
- 98% purity with patented controlled-release technology
- Developed with leading longevity researchers
- Clinically studied for reducing biological age
- Enhanced with B vitamins for methylation support
- Optimized specifically for men’s health needs
What Could Be Better
- Premium pricing reflects advanced formulation
- Gender-specific formulation limits household sharing
Bottom Line: For men seeking the most advanced Ca-AKG supplement backed by clinical research, Rejuvant offers unmatched quality and innovation.
4. AJAXERRUE Liposomal Ca-AKG — Best for Absorption
- More Effective Liposomal Ca AKG: Each bottle has 60 capsules with 1500 mg liposomal Calcium AKG per serving for a lasting supply. More effective than AAKG, this Ca AKG ensures energy balance and wellness, with liposomal form for better absorption.
- Maximum Absorption Liposomal Technology: Conventional pills and powders show limited AKG absorption. Liposomal structure creates a protective layer around nutrients, keeping them away from gastric acid and maintaining optimal bioavailability.
- Age Defense: The vision of reversing aging and enjoying vitality beyond 100 connects to calcium alpha-ketoglutarate. alpha-ketoglutarate works in many pathways in the body. Ca AKG has a role in energy balance, bone integrity, and metabolic stability.
- Elevate Your Well-Being: Calcium AKG (alpha-ketoglutarate) as protection from free radical damage. Liposomal AKG formula for immunity, longevity, mood balance, and age defense through wrinkle care, bone strength, muscle relief, and mineral uptake.
- Premium Quality & Safety: Our advanced Liposomal Calcium AKG is soy-free, gluten-free, and dairy-free. It is a Ca AKG based on liposomal technology. Ca AKG activation of the AMPK pathway for energy equilibrium and enhanced mitochondrial function.
AJAXERRUE leverages advanced liposomal technology to maximize Ca-AKG bioavailability and absorption.
The liposomal delivery system creates a protective layer around the nutrients, shielding them from harsh stomach acid and ensuring optimal uptake. Each serving provides 1500mg of calcium alpha-ketoglutarate in convenient softgel form, with 240 softgels providing an excellent 80-serving supply.
What We Like
- Liposomal technology for superior absorption
- High 1500mg dose per serving
- 80 servings per bottle for great value
- Softgel format easier to swallow than capsules
- Free from soy, gluten, and dairy
What Could Be Better
- Requires 3 softgels per serving
- Liposomal technology increases cost
Bottom Line: If maximum absorption is your priority, AJAXERRUE’s liposomal delivery system ensures your body can effectively utilize this powerful longevity compound.
5. LongJuvity Time Release AKG — Best Extended Release
- CELLULAR-LEVEL SUPPORT FOR HEALTHY AGING: LongJuvity Calcium AKG Capsules promote vital functions like cell repair, detoxification, and gene signaling to support healthy aging and longevity. By enhancing these processes, it helps maintain energy and vitality.
- PEAK PERFORMANCE MUSCLE SUPPORT: Whether you're an athlete or simply staying active, our CA-AKG supplement supports endurance, strength and muscle recovery. Trusted by bodybuilders for decades, it helps prevent muscle loss and promotes growth with regular use.
- ADVANCED ENTERIC COATING WITH ENHANCED ABSORPTION: Our capsules are designed to withstand stomach acids, ensuring optimal delivery of active ingredients. Enhanced with piperine to improve absorption, making this formulation more potent and effective.
- SCIENCE SUPPORTED FOR BONE & OVERALL HEALTH: Research shows calcium alpha-ketoglutarate is superior to other forms of calcium for bone health. By supporting both bone strength and metabolic function, it’s a smart choice for long-term wellness.
- NATURALLY SOURCED & LAB TESTED FOR QUALITY: Our Calcium Alpha-Ketoglutarate supplement is made from high-quality, naturally sourced ingredients and independently lab-tested for purity, so you can trust what’s inside. Crafted in the USA in a GMP-compliant, ISO-certified facility, our supplement meets the highest quality standards.
LongJuvity combines enteric coating with piperine enhancement for prolonged Ca-AKG delivery.
The enteric-coated capsules protect the active ingredients from stomach acid degradation, ensuring they reach the intestines intact for optimal absorption. Enhanced with piperine (black pepper extract), this formula further improves bioavailability while delivering 1000mg of calcium alpha-ketoglutarate per serving.
What We Like
- Enteric coating protects against stomach acid
- Enhanced with piperine for improved absorption
- Independently third-party lab tested
- Supports both bone health and metabolic function
What Could Be Better
- Only 30 servings per bottle
- Two-capsule serving size required
Bottom Line: LongJuvity’s time-release technology ensures steady Ca-AKG delivery throughout the day for consistent cellular support.
6. SMNutrition AAKG — Best for Athletic Performance
- PREMIUM, POWERFUL AAKG: Arginine Alpha Ketoglutarate (also known as Arginine Alpha Ketoglutaric Acid) is the premium form of AKG and plays a critical role in many bodily processes.* Our AKG supplement contains a potent 1100mg AAKG per serving.
- HEALTHY AGING SUPPORT: Alpha-Ketoglutarate may support healthy aging by promoting cellular energy production, defending against oxidative stress, and supporting brain function and immune system activity.*
- ENERGY & STAMINA: L-Arginine Alpha-Ketoglutarate helps convert glucose and fatty acids into ATP, the primary source of energy for our cells. Arginine AKG also supports the production of Nitric Oxide tO support energy levels.*
- WITH CALCIUM & VITAMIN C: We’ve included calcium in our CA AKG supplement to support better absorption in the body, along with 100mg of Vitamin C for added immune support.*
- 90-DAY SUPPLY: Every bottle contains 120 AAKG capsules (90 servings). SMNutrition’s Alpha Ketoglutarate Supplement is Vegan and formulated Gluten-Free, Non-GMO, and without the top 9 allergens.
SMNutrition offers arginine alpha-ketoglutarate (AAKG), a premium form that combines longevity benefits with athletic performance support.
This formula delivers 1100mg of AAKG per serving along with 100mg of vitamin C for immune support. The arginine component supports nitric oxide production, making this particularly beneficial for active individuals seeking both anti-aging benefits and improved exercise performance.
What We Like
- AAKG form supports nitric oxide production
- Enhanced with vitamin C for immune function
- 90-day supply with 120 capsules
- Vegan, non-GMO, and allergen-free
- Supports both longevity and athletic goals
What Could Be Better
- AAKG differs slightly from pure Ca-AKG
- May not be ideal for sedentary individuals
Bottom Line: Athletes and active individuals will appreciate SMNutrition’s dual-purpose formula that supports both cellular health and physical performance.
7. Maxx Herb Calcium AKG Powder — Best for Flexibility
- 100% PURE POWDER: While other Calcium Alpha-Ketoglutarate are filled with added flavors and sweeteners, Maxx Herb contains only pure Calcium Alpha Ketoglutarate. We do not add anything else to our product! Our premium-quality Ca-AKG powder is 100% non-GMO and gluten free. You can count on Maxx Herb to bring you the best quality product.
- POTENTIAL HEALTH BENEFITS – Promotes cellular energy, vitality, energy and supports healthy inflammation response. It supports normal calcium concentration levels in the blood.
- 1 JAR (67 SERVINGS) – To provide your body with the best potential benefits, we recommend taking 1 scoop (1500mg) of our calcium powder 1 - 2 times a day as needed. Mix in water, juice, smoothies, or your favorite beverage. The maximum strength anti-aging support powder allows the Ca-AKG to be quickly and effectively absorbed into your body - unlike most capsules, or tablets, which take longer to be absorbed.
- FAST ACTING POWDER – Our calcium ketoglutarate powder mixes easily with juice, water, or smoothies. Want to stay fit? Take it before a workout, hiking, biking or other rigorous activities as it can help improve athletic performance.
- MADE IN THE USA – Sourced, manufactured and bottled in the USA. All our products are Gluten Free, Vegan and Non-GMO. Ingredients: Calcium Alpha - Ketoglutarate (Ca-AKG) - Packaging May Vary: Lids may be smooth or have ridges depending on supply available.
Maxx Herb provides 100% pure calcium alpha-ketoglutarate powder without any additives, flavors, or sweeteners.
The unflavored powder format allows for complete dosing flexibility and can be easily mixed into beverages or smoothies. With 67 servings at 1500mg per scoop, this offers excellent value for those who prefer powder supplements or want to customize their dosage.
What We Like
- 100% pure with zero additives or fillers
- Powder form allows flexible dosing
- 67 servings for extended supply
- Easy to add to drinks or smoothies
- Made in USA with non-GMO ingredients
What Could Be Better
- Powder may be less convenient than capsules
- Requires measuring for accurate dosing
- Unflavored taste may not appeal to everyone
Bottom Line: For those who prefer powder supplements or want maximum control over their dosage, Maxx Herb delivers pure Ca-AKG without compromise.
How to Choose the Best Ca-AKG Supplement
Selecting the right calcium alpha-ketoglutarate supplement requires understanding several key factors that impact effectiveness and value. The purity level is paramount—look for products with 98%+ purity to ensure you’re getting primarily active compound rather than fillers. Higher purity formulations like Toniiq’s 99%+ standard deliver more of the beneficial alpha-ketoglutarate molecules that support cellular health and longevity.
Dosage is another critical consideration. Research suggests effective doses range from 1000mg to 1500mg per day of Ca-AKG. Studies on lifespan extension and biological age reduction have typically used doses in this range, with some clinical trials showing significant benefits at 1000mg daily over seven months. Consider whether you prefer to split your dose throughout the day or take it all at once when choosing between standard and time-release formulations.
Bioavailability enhancement technologies can significantly impact how much Ca-AKG your body actually absorbs. Liposomal delivery systems like those used by AJAXERRUE protect the compound through the digestive process, while enteric coatings prevent stomach acid degradation. Addition of piperine (black pepper extract) or vitamin D can further improve absorption. These technologies typically increase cost but may offer better value if they significantly improve how much Ca-AKG reaches your cells.
Form factor is a personal preference but impacts convenience and compliance. Capsules offer precise dosing and portability, though some formulations require taking 2-3 capsules per serving. Softgels are often easier to swallow and may have better stability for certain formulations. Powders provide maximum flexibility for dosing and can be mixed into beverages, but require measuring and may have taste considerations. Choose the format you’re most likely to take consistently.
Additional ingredients can enhance or complement Ca-AKG’s benefits. B vitamins support the methylation pathways that Ca-AKG influences, making combinations like Rejuvant’s particularly effective. Vitamin C provides antioxidant support, while calcium content varies between products—some provide significant amounts of elemental calcium alongside the alpha-ketoglutarate. Consider your overall supplement regimen when evaluating whether these additions add value or create unnecessary duplication.
Benefits of Ca-AKG Supplements
Calcium alpha-ketoglutarate occupies a central role in cellular metabolism as a key intermediate in the Krebs cycle, the fundamental pathway through which cells generate energy. As we age, natural AKG levels decline, correlating with reduced cellular energy production and various age-related changes. Supplementing with Ca-AKG helps restore these levels, supporting the mitochondrial function that powers virtually every cell in your body. Research indicates this metabolic support translates to improved energy levels and reduced feelings of fatigue.
Perhaps most exciting is Ca-AKG’s potential impact on biological aging itself. A landmark clinical trial found that supplementation with 1000mg of Ca-AKG daily for seven months reduced biological age by an average of 8 years in participants. This compound appears to work through multiple mechanisms including supporting DNA methylation patterns, reducing inflammatory markers, and protecting against cellular senescence. Animal studies have shown Ca-AKG extending lifespan by 12% and increasing healthspan by 41% in mice, suggesting profound anti-aging effects.
Bone and muscle health represent another significant benefit area, particularly important as we age. Calcium alpha-ketoglutarate provides a highly bioavailable form of calcium while simultaneously supporting the metabolic processes that maintain bone mineral density. Studies in postmenopausal women have demonstrated that Ca-AKG supplementation reduces markers of bone breakdown and supports bone formation. The compound also helps preserve muscle mass and strength by supporting protein synthesis and reducing muscle catabolism, making it valuable for maintaining physical function and independence.
Beyond these well-studied benefits, Ca-AKG supports numerous other aspects of health. It acts as a powerful antioxidant, helping cells defend against oxidative stress that accumulates with age. The compound supports immune function by providing fuel for immune cells and helping maintain their metabolic activity. Some users report improvements in mental clarity and focus, likely related to Ca-AKG’s role in neurotransmitter synthesis and brain energy metabolism. Its influence on collagen production may also support skin health and wound healing, contributing to a more youthful appearance both inside and out.
Frequently Asked Questions
What is the optimal dosage of Ca-AKG for longevity benefits?
Research suggests that 1000-1500mg per day is the effective range for longevity and anti-aging benefits. The most widely cited clinical trial used 1000mg daily and showed significant reductions in biological age markers after seven months. Some users take the full dose in the morning, while others split it into two doses to maintain more stable blood levels throughout the day. It’s best to start with 1000mg daily and assess your response before increasing to higher doses.
How long does it take to see results from Ca-AKG supplementation?
Many users report improved energy levels within the first few weeks of consistent supplementation. However, the more profound anti-aging and metabolic benefits typically become apparent after 3-6 months of regular use. The clinical trial that demonstrated biological age reduction used a 7-month supplementation period. For optimal results, consider Ca-AKG a long-term investment in your healthspan rather than expecting immediate dramatic changes.
Is Ca-AKG the same as AAKG used in sports supplements?
While related, calcium alpha-ketoglutarate (Ca-AKG) and arginine alpha-ketoglutarate (AAKG) are different compounds with distinct effects. AAKG combines alpha-ketoglutarate with the amino acid L-arginine, primarily used to support nitric oxide production and athletic performance. Ca-AKG uses calcium as the binding agent and is specifically studied for longevity and cellular health benefits. Some supplements offer AAKG for a dual-purpose approach supporting both athletic performance and healthy aging.
Can I take Ca-AKG with other longevity supplements?
Ca-AKG generally combines well with other longevity supplements and may have synergistic effects when paired appropriately. Many users stack it with NMN or NR for NAD+ support, resveratrol for sirtuin activation, or CoQ10 for mitochondrial function. The combination of Ca-AKG with methylated B vitamins can be particularly effective since B vitamins support the methylation processes that Ca-AKG influences. Always start supplements one at a time to assess individual tolerance and consider consulting a healthcare provider about your specific stack.
Are there any side effects from Ca-AKG supplementation?
Ca-AKG is generally well-tolerated with minimal side effects reported in clinical studies. Some users experience mild digestive discomfort when first starting, which typically resolves as the body adjusts. Taking Ca-AKG with food can minimize any stomach upset. Because it provides calcium, those with kidney stones or high calcium levels should consult a healthcare provider before supplementing. Some people report a mild energizing effect, so if you’re sensitive to stimulation, consider taking your dose in the morning rather than evening.
Does the purity percentage really matter for Ca-AKG supplements?
Purity level significantly impacts the amount of active compound you’re actually receiving. A supplement with 78% purity means 22% of the material is inactive ingredients or impurities, while a 99% pure product delivers nearly all active Ca-AKG. This affects both effectiveness and value—you need less of a higher-purity product to achieve the same dose of actual alpha-ketoglutarate. Premium products like Toniiq and Rejuvant that emphasize 98-99%+ purity ensure you’re getting maximum benefit from each capsule.
Should I cycle Ca-AKG or take it continuously?
Current research and clinical practice suggest continuous daily supplementation provides the best results for longevity benefits. Unlike some supplements that may lose effectiveness with continuous use, Ca-AKG works by replenishing naturally declining levels of alpha-ketoglutarate, so ongoing supplementation maintains these beneficial levels. The clinical trials demonstrating biological age reduction used continuous daily dosing without cycling. However, if you’re using Ca-AKG primarily for athletic performance benefits, some users prefer to cycle it around training periods.
Can Ca-AKG help with bone density in postmenopausal women?
Research specifically supports Ca-AKG for bone health in postmenopausal women. Studies have shown that supplementation reduces markers of bone breakdown and may help maintain or improve bone mineral density. The calcium component provides building material for bone, while the alpha-ketoglutarate supports the metabolic processes involved in bone formation and maintenance. For women concerned about osteoporosis or osteopenia, Ca-AKG offers a research-backed option that addresses bone health from multiple angles.
