How Controlled-Release CaAKG Affects Biological Age

In the study of human aging, separating real biological impact from enthusiasm has always been difficult. When you look across the wellness landscape, dozens of compounds are marketed with claims of slowing down time. Most of these assertions rest on experiments conducted in cell cultures or short-lived model organisms like mice and nematodes. While those models offer helpful clues, the human body handles nutrients, metabolism, and clearance in a far more complex way.

To evaluate whether any of these interventions produce measurable changes in people, scientists have to analyze large groups of living humans across extended periods of time.

A study published in the journal Aging Cell, titled "Supplements and Drugs Are Associated With Biological Age in a Cohort of Exceptionally Healthy Individuals," addressed this question directly. Led by researcher Kamil Pabis and co-authored by Dr. Brian Kennedy—who serves as Chief Scientific Officer here at Ponce De Leon Health—the investigation examined real-world health data from 4,260 participants.

The research team tracked 84 commonly used supplements and prescription medications to observe how they correlated with biological aging. Across this broad catalog of interventions, a controlled-release formulation of calcium alpha-ketoglutarate, known as CaAKG and utilized in Rejuvant, produced a distinct statistical footprint. At the same time, standard, unformulated AKG failed to demonstrate a significant association with reduced biological age.

Looking closely at the mechanics of this study helps clarify why delivery design dictates biological outcomes.

To interpret the data, one must first understand how modern geroscience measures the pace of aging. Chronological age is simply the count of days since a person was born. Biological age, by contrast, evaluates the functional and structural health of tissues and organs.

In this investigation, biological age was quantified using a saliva-based epigenetic clock developed by TruMe. Epigenetic clocks operate by measuring DNA methylation. Methylation marks are microscopic chemical tags placed along the genome that help dictate which genes are switched on and which are silenced. Over the course of a human life, these chemical tags shift in predictable, identifiable ways. By assessing the methylation status across specific sites on the genome, an algorithm can calculate an individual's biological age.

The individuals who participated in this study were not an average cross-section of the public. They were health-conscious adults. Only 4% reported a history of smoking, compared to roughly 18% in broader national datasets like the National Health and Nutrition Examination Survey. Furthermore, nearly 90% graded their personal health as good or excellent, and 71% routinely used dietary supplements.

On average, the baseline biological age of this cohort was already roughly two years lower than their chronological age. Because these individuals already ate balanced diets, exercised regularly, and avoided basic health risks, detecting an added benefit from any single supplement required a measurable, independent physiological effect.

When analyzing biological clocks across thousands of individuals, researchers frequently encounter a statistical phenomenon: older participants almost always register as biologically younger than their calendar years.

Part of this trend stems from survivor bias. Individuals who reach advanced decades in good physical standing often carry natural genetic advantages. Another part is mathematical, rooted in how linear regression equations are structured when calculating age deltas.

If a research team relies solely on the raw difference between calendar age and biological age, any group with an older average age will appear to experience a massive biological reduction purely as an artifact of the calculation.

To account for this confounding variable, the study used a metric called the Age Residual. The Age Residual uses linear modeling to compare an individual's biological marker directly against peers of the exact same chronological age. A negative Age Residual indicates that a person is biologically younger than what the statistical baseline predicts for someone born in their exact year.

Using this metric allowed the researchers to evaluate each of the 84 compounds without the skew of chronological age.

The cohort reported using a wide selection of popular health interventions. The list included high-profile longevity molecules such as NAD precursors (including NMN and NR), coenzyme Q10, curcumin, resveratrol, omega-3 fatty acids, and high-dose vitamin D3.

In simple, unadjusted comparisons, several of these products showed an initial correlation with lower biological age marks. Compounds like carotenoids, vitamin D3, and NAD precursors appeared promising when examined in isolation.

However, observational data requires careful controls. In our research environment, we understand that people who buy longevity supplements also tend to exercise more, sleep better, and maintain better diets.

To separate the effects of the pills from the habits of the people taking them, the researchers applied two progressively strict multivariate models:

Once these lifestyle variables were integrated into the analysis, the observed benefits for nearly every popular supplement flattened out. The participants taking those products were generally healthy because of their overall routines rather than the specific supplements they consumed.

Controlled-release CaAKG was the distinct exception.

In the cross-sectional dataset, participants taking controlled-release CaAKG showed an average 1.8-year lower Age Residual. The statistical association remained significant across both multivariate models (p < 0.01).

To challenge the finding further, the investigators ran a nearest-neighbor matching analysis, pairing controlled-release CaAKG users with non-users who shared identical health habits, exercise levels, and physical metrics. Even in this tightly matched group, controlled-release CaAKG users maintained a 1.27-year lower Age Residual (p < 0.01).

In the longitudinal branch of the study, which evaluated 755 participants who completed multiple tests over an average span of 367 days, individuals on a controlled-release CaAKG subscription were significantly more likely to experience an ongoing reduction in biological age over time (odds ratio: 1.37, p = 0.045). It was the only supplement in the longitudinal analysis to maintain its significance after adjusting for age, sex, smoking, and general health.

A key takeaway from this dataset is the comparison between controlled-release CaAKG and standard, unformulated AKG.

The paper analyzed participants taking non-delayed, standard AKG products separately. While the controlled-release cohort demonstrated statistically robust reductions in Age Residual, individuals taking standard AKG showed a much smaller shift that failed to achieve statistical significance.

The reason for this divide lies in the digestive handling of the molecule.

Alpha-ketoglutarate is an intermediate in the Krebs cycle, central to cellular energy production and nitrogen management. When ingested in a standard, unshielded format, it faces two significant physiological obstacles:

Controlled-release delivery alters this pharmacokinetic profile.

By binding alpha-ketoglutarate to calcium and housing it within a controlled-release matrix, the tablet resists rapid dissolution in the stomach and upper duodenum. Instead, the active compound is released gradually throughout the intestinal tract. This prevents local enterocytes from consuming the entire payload at once, allowing a steady fraction of CaAKG to enter systemic circulation.

Once in the bloodstream, CaAKG can reach remote cell populations. There, it serves as an essential cofactor for 2-oxoglutarate-dependent dioxygenases, a family of enzymes that includes TET DNA demethylases. These enzymes maintain epigenetic structure by removing excess methylation tags from DNA. Regular AKG is cleared before it can reach these targets; controlled-release CaAKG persists long enough to supply them.

For someone evaluating their own health choices, the conclusions of this paper point toward practical considerations:

Biological aging is a continuous, measurable process. While lifestyle choices build the foundation of physical preservation, providing your cells with a sustained, bioavailable supply of controlled-release CaAKG offers a proven, data-supported method to keep your biological clock moving at a healthier pace.