Longevity Biomarkers Explained: NAD+, HbA1c, Grip Strength Guide

How to Track The Impact Of Your Longevity Supplements: A Practical Guide

You might buy top-rated longevity supplements and take them daily, just as directed, for months. But unless you measure your progress, you won’t really know if they’re making a difference.

This challenge isn’t unique to supplements. Many things you can’t see, like cholesterol, blood pressure, NAD+ levels, or glucose response, are easy to overlook until something makes you notice. With a longevity routine, you’re choosing to pay attention early. That only works if you can actually see whether your efforts are making the impact you want.

There are four main ways to track your progress: blood panels, wearables, continuous glucose monitors, and simple at-home tests. The best mix for you depends on which supplements you use and what you want to find out.

What 'tracking supplement impact' actually means

Before we dive into the methods, there are two important differences to keep in mind.

Direct biomarkers versus downstream signals: Most longevity supplements don’t have a simple test you can buy. For example, NMN increases NAD+, but few labs check NAD+ directly, and those that do often charge a lot. (Test your NAD+ levels at home with the AVEA Longevity NAD+ Test) Instead, you look at downstream effects like HRV, recovery, sleep quality, and inflammation markers. Usually, the marker you can measure isn’t the exact target of the supplement, but rather how your body responds overall.

Single-point readings versus continuous tracking: A blood panel gives you a snapshot of your health at one moment. Wearables or CGMs, on the other hand, show you a moving picture over time. Both are helpful, but for different reasons. A snapshot shows your current state, while continuous tracking reveals trends and changes.

The effects of supplements build up over weeks or months, not days. For example, the RENEW study on NAD+ lasted 60 days, and the Collagen Activator trial measured results after 12 weeks. Day-to-day changes don’t mean much; it’s the longer-term trends that matter.

AVEA Vitality Bundle supplements with NMN and Booster supporting NAD+ production, energy, recovery, and sleep with measurable results

Blood panels - tracking biomarkers directly

Blood panels are the gold standard for measuring most longevity biomarkers directly. The most useful ones for a longevity routine:

hs-CRP and inflammatory markers - respond to many longevity interventions over 8 to 12 weeks. Ingredients with anti-inflammatory potential across our range, including Booster, Collagen Activator, Cell Primer, Mobiliser, and Sereniser, may show up here over time, alongside the downstream effects of restored NAD+ from NMN.
HbA1c and fasting glucose - HbA1c reflects average glucose over the preceding 2 to 3 months, which makes it a clean way to verify whether Stabiliser is supporting glucose response for you over time.
Vitamin D, B12, iron - basic deficiency screening before starting any longevity stack. Fixing a foundational deficiency does more for most people than any optimisation supplement.
Lipid panel - annual cardiovascular check, useful regardless of what you're taking.

The catch is that a blood panel only shows a single moment in time. It tells you your current status, but not how your body changes from day to day. For that, you need continuous tracking.

Wearables - tracking supplement impact continuously

You’ll notice supplement effects as trends that develop over weeks, but you can only spot these if you track daily. Four key signals are important, and each one connects to a specific AVEA supplement.

HRV (heart rate variability)is the most useful single metric for tracking longevity supplements continuously. Higher HRV reflects better autonomic recovery and is associated with sleep quality, cardiovascular health, and resilience. In our QuestVitality pilot study, Sereniser was associated with HRV increases of 7-25% in all participants tracked via Oura over 30 days. The Vitality Bundle's link to HRV is indirect, working through the sleep and mood improvements measured in our RENEW study (24% reduction in self-reported sleep disturbance, 38% reduction in depression scores, both statistically significant).

Sleep efficiency and sleep stages - REM, deep, and light sleep duration and proportions. Responds to Sereniser most directly. In our PRUVN pilot study, 30 days of Sereniser was associated with REM sleep increases of up to 22%, deep sleep improvements up to 5%, and sleep efficiency gains up to 9%, all measured via Oura ring. Sleep latency decreased by 18%. Improvements showed up within the 30-day intervention period.

Resting heart rate is slower-moving but informative. It responds to cardiovascular health, recovery quality, and the cumulative effects of better sleep and reduced inflammation. In our pilot, all participants showed RHR decreases of 3 to 5 bpm over 30 days. RHR shifts of 2 to 5 bpm over a few months are real signals, not noise.

Changes in skin temperature can show inflammation, infection, hormone cycles, and how well you’re recovering. This is helpful for spotting early signs of overtraining or illness. For women, it can also help confirm ovulation when using supplements that align with their cycle.

The Ultrahuman Ring AIR is designed for tracking many different health signals at once. Its PowerPlugs system lets you customize your data for specific longevity goals, like matching caffeine timing to your sleep, tracking vitamin D based on your skin and sun exposure, keeping your body clock in sync, detecting AFib, and monitoring cycles and ovulation. real work is the Trends view. You start a new stack, you tag the change, you watch HRV and sleep efficiency over the following 8 to 12 weeks, and you see whether the protocol is doing what you hoped. It's the closest thing to a closed feedback loop available on the consumer market.

Continuous glucose monitors - tracking metabolic response

Glucose is the easiest biomarker for consumers to measure, and it responds quickly to changes. After a meal, supplement, or workout, you can see your glucose levels change within minutes instead of weeks.

Glucose tracking is important even if you’re not diabetic. Big swings in blood sugar between meals are now linked to inflammation, oxidative stress, and faster aging in healthy people too. Keeping your glucose steady is a goal for longevity, not just for diabetes.

For AVEA supplements, the Stabiliser is made to help with glucose metabolism and lower blood sugar spikes after meals. Using a CGM, you can see in your own data if it’s working over several weeks, instead of just guessing. Try a Stabiliser cycle, keep your meals the same, and watch if your post-meal blood sugar levels become steadier. This is the closest you can get to running a personal A/B test.

The Ultrahuman M1 is a small, flexible sensor placed just under the skin to measure glucose in the fluid between your cells. Each sensor works for 14 days. It is quick and easy to apply, and you can wear it in the shower or while swimming for up to 30 minutes at a depth of one metre.

Basic at-home tests - low-cost tracking tools

These tests cost less, aren’t as precise, and don’t track you all the time, but they’re helpful for filling in the gaps without spending much.

Resting heart rate - measure first thing in the morning. Trend over weeks reflects cardiovascular and recovery status.
Body composition - bioimpedance scales aren't precise but are consistent enough to track trends, especially alongside resistance training.
Grip strength - declining grip strength correlates with mortality risk in older adults. A cheap dynamometer gives you a baseline.
Visual signals - skin elasticity, hair quality, nail condition. Subjective but informative for tracking Collagen Activator over its 12-week clinical timeframe.
Sleep journaling - basic notes on sleep timing and subjective quality. Useful complement to wearable data when tracking Sereniser.

These tests don’t replace the main tracking methods, but they’re affordable and helpful extras.

Putting it together - a practical tracking routine

You don’t have to use all four tracking methods at the same time. Here’s a simple way to start:

Annual blood panel plus a follow-up at 8 to 12 weeks after starting a new supplement.
A smart ring worn 24/7 - the Ring AIR if you're running a longevity routine and want PowerPlugs and M1 integration.
A CGM cycle (14–28 days) once or twice a year to map your glucose response - the M1 if you want it in the same app as the ring.
Use simple at-home tracking to give you extra context as you go.

The AVEA stack maps cleanly onto these methods:

Vitality Bundle (NMN + Booster) → blood panel inflammatory markers + Ring AIR HRV and recovery trends
Collagen Activator → blood panel inflammation + Ring AIR recovery patterns + visual at-home signals
Stabiliser → M1 CGM glucose response + HbA1c on annual blood panel
Sereniser → Ring AIR HRV, sleep efficiency and stages + sleep journaling

The easiest way to build a solid tracking routine is to start with the Vitality Bundle, then add the Ring AIR to see your progress in your data. When you’re ready to track your metabolism more closely, add the M1 CGM and Stabiliser.

Closing

The truth is, you can’t really know if your supplements are working unless you measure. Each of the four methods gives you different information, with its own costs and timing. No single method tells the whole story, but together, they do.

The AVEA and Ultrahuman system is designed to make things easier. You get one ordering source, one app, and a clear feedback loop between the supplements you take and the changes in your body.

If you want to know which smart ring is best for longevity, check out our smart ring comparison.

Frequently asked questions

How long does it take to see if a supplement is working?

Most longevity supplements show up in your data over 8 to 12 weeks. Stabiliser is faster - glucose response shifts within days on a CGM. Sereniser shows up in sleep data within 4 to 8 weeks. Daily fluctuations are noise; multi-week trends are the signal.

Do I need a blood test before starting supplements?

It's a good idea but not strictly necessary. A baseline panel gives you something concrete to compare against later. If you skip it, wear a smart ring for 14 days before starting to establish a behavioural baseline instead.

Can a smart ring really measure the impact of supplements?

Indirectly, yes - through downstream signals like HRV, sleep efficiency, recovery, and skin temperature. Track those before and after starting a supplement, over 8 to 12 weeks, and you can see whether your protocol is moving them.

What's the most directly measurable longevity supplement?

Stabiliser, paired with a CGM. Glucose shifts within minutes of a meal, so you can see Stabiliser's effect on post-meal curves over a single 14-day sensor cycle.

Do you need a CGM if you're not diabetic?

Not strictly. But research shows that high glucose variability in young adulthood is associated with a 1.64x higher risk of developing diabetes, and a 1.25x higher risk of all-cause mortality. A CGM cycle once or twice a year tells you which foods, supplements, and habits are moving the needle on metabolic stability.

What's the simplest tracking routine to start with?

A smart ring worn 24/7. It captures the four most useful signals continuously, with no subscription on the Ring AIR, and the data is enough to see most longevity supplements working over 8 to 12 weeks.

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