[00:08] actually moves the needle when your baseline lifestyle is already optimized? Mainly discussions in the health and longevity community center around optimizing diet, exercise, and sleep. A critical question emerges for those
[00:23] foundational habits. Do longevity supplements provide an additional biological benefit? Or does an individual eventually hit a ceiling effect where further interventions yield no measurable returns?
[00:38] And if so, which ones? To explore this question, a research team led by Kamal Pabis, Yuan Gruba, and senior author Brian Kennedy at the National University of Singapore Healthy Longevity Translational Research Program
[00:53] evaluated a unique cohort. Their study titled Supplements and Drugs Are Associated with Biological Age in a Cohort of Exceptionally Healthy Individuals was published in the journal Aging Cell in 2026.
[01:09] Aging Cell in 2026. The researchers analyzed data from 4,260 participants collected between 2020 and 2025. This specific cohort consisted of self-described health enthusiasts who
[01:22] actively purchased at least one saliva-based epigenetic test and completed extensive medical and lifestyle questionnaires. The baseline metrics of this group were notably high.
[01:35] 71% of the participants regularly consume supplements, which is a substantially higher rate than seen in the general public. Furthermore, the group demonstrated very low smoking rates and a low incidence of
[01:48] chronic disease, establishing them as an ideal test group for evaluating supplement efficacy against a highly optimized lifestyle background. To see how these choices correlate with aging biomarkers, the researchers
[02:01] utilized a cross-sectional observational study design. The investigators did not distribute supplements or mandate specific daily routines. Instead, they captured a real-world snapshot of the participants'
[02:15] established protocols and mapped those behaviors against their biological The biological measuring tool chosen for this study was a proprietary this study was a proprietary saliva-based nine CPG DNA methylation
[02:28] TruMe. This clock measures molecular tagging patterns at nine specific sites across three targeted genes operating with a three targeted genes operating with a mean absolute error of 5.4 years.
[02:42] The primary metrics evaluated were the age residual and the age delta. A negative score indicates that an individual is biologically younger than their calendar age, while the age delta represents the raw difference in years,
[02:57] the age residual incorporates statistical adjustments to account for potentially confounding variables. The research team tested the correlation of 84 distinct commonly used supplements against this epigenetic clock.
[03:12] When the scientists analyzed the data, a commercially available delayed-release alpha-ketoglutarate and vitamins emerged with the strongest correlation. This specific formulation, known
[03:25] commercially as Rejuvenate, was associated with an average of 1.8 year lower biological age residual. This statistical association remained highly significant even after the researchers applied rigorous
[03:39] multivariate adjustments for age, sex, smoking status, baseline health, and other lifestyle habits. Interestingly, the delivery mechanism appeared to be a critical factor for a success. Participants who consume
[03:53] standard non-delayed release alpha-ketoglutarate or AKG showed a much smaller biological benefit that failed to achieve statistical significance. This variant suggests that the specific form and delivery mechanism matter.
[04:10] Plain AKG may break down prematurely in the gastrointestinal tract, whereas the delayed release calcium-bound formulation appears to enter systemic circulation more effectively. The data also revealed a subtle signal
[04:26] in a smaller longitudinal subset of trackable users where coenzyme Q10 showed increased odds of lowering biological age. However, this this specific correlation lost statistical significance after
[04:39] final multivariate corrections were applied, meaning the trend could have occurred by chance. The study also addressed the common concept of supplement stacking, technically known as polypharmacy.
[04:52] taking multiple supplements simultaneously and detected zero adverse practice. This finding challenges the conventional
[05:04] supplement stack is inherently detrimental or toxic to aging biomarkers. To understand why alpha-ketoglutarate altered the epigenetic clock while other popular antioxidants did not, we must
[05:19] mechanisms. Alpha-ketoglutarate is an endogenous metabolite that declines naturally with age as the mitochondrial function degrades. It serves as a non-negotiable substrate for the TET enzymes, which
[05:35] function as a primary cellular cleanup crew responsible for active DNA demethylation. Without a sufficient supply of stall. This cellular deficit leads to
[05:49] epigenetic drift, a process where unwanted methyl tags accumulate and lock up specific genes as we age. Supplementing with delayed-release calcium alpha-ketoglutarate provides the necessary substrate these enzymes
[06:04] require to actively strip away these accumulated age markers. As a reality check regarding dietary options, alpha-ketoglutarate is produced naturally by the body, but it is not present in large, easily consumable
[06:18] quantities within standard foods. While trace amounts exist in certain foods, matching the precise therapeutic concentrations used in clinical generally impractical, which underlines the utility of direct
[06:33] molecule. When considering safety and potential contraindications, alpha-ketoglutarate is generally well tolerated because it is a natural metabolite.
[06:46] However, high doses may interact with medication-altering metabolic pathways, and individuals with underlying kidney conditions or specific metabolic disorders should exercise caution. As promising as these findings look, we
[07:01] must evaluate the structural limitations of the study design. cross-sectional and observational, it proves a statistical association rather than direct causation. Furthermore, the study relied heavily on
[07:15] self-reported questionnaires, which introduces recruitment and recall bias. Large, randomized controlled trials remain the gold standard of scientific However, because non-patentable supplements rarely receive the massive
[07:30] funding required to conduct these expensive trials, real-world observational studies of this scale provide highly useful data for the longevity community provided we remain mindful of the inherent limitations.
[07:46] Now, whenever a single proprietary formulation stands out like this in a formulation stands out like this in a study, we have to look for hidden bias. find that the senior author of this paper, Dr. Brian Kennedy, is the chief
[07:59] scientific officer at Ponce de Leon Health, the company that manufactures Rejuven AKG. While it's definitely frustrating that statement didn't call this connection out more overtly, the raw statistical
[08:14] data forces us to stay objective because it tells a very unexpected story. You might assume dAKG won simply because the group was artificially inflated by a
[08:26] corporate subscription database. If we look at the raw numbers as shown in this table, the exact opposite is true. NAD boosters had a massive pool of true. NAD boosters had a massive pool of 720 users, and vitamin D3 had 690 users.
[08:42] Yet, despite having up to five times more data points, NAD boosters failed to show a significant correlation with a younger biological age. And vitamin D3 faded out under strictest statistical corrections.
[08:56] Meanwhile, dAKG had a much smaller group of just 143 users, but it still managed to pierce right through the statistical noise to show a significant association with a lower biological age. What this tells us is that while we must
[09:11] acknowledge the corporate ties, the molecule and its standardized delivery mechanism are producing a generally powerful biological signal that generic counterparts seem not to replicate.
[09:24] I'm curious to hear from you. Are any of you currently implementing alpha-ketoglutarate in your daily protocol? If so, what dose are you using? And have you tracked any changes in your
[09:36] biological age or blood work? Let me know in the comments below. Thank Let me know in the comments below. Thank you for your attention.