If you've ever felt more relaxed after a cup of chamomile tea, you've felt apigenin at work. It's the flavonoid most responsible for chamomile's long-standing reputation for helping people wind down at the end of the day. What fewer people know is that the same molecule has a second life in longevity research, where it's studied for how it behaves inside aging cells.

That combination is unusual. Most ingredients earn their place in a formula for one reason. Apigenin is interesting precisely because it works on two things people care about at opposite ends of the day: how well you rest at night, and how your cells hold up over the years.

Apigenin is one of the 88 ingredients in Tmrw. Here's what it does, starting with the part you can feel.

What is apigenin?

Apigenin is a plant flavonoid, part of the same broad family as quercetin and luteolin. It occurs naturally in a range of foods, with parsley, celery and chamomile among the richest sources. Like most flavonoids, it has antioxidant and anti-inflammatory properties, meaning it helps the body manage the everyday oxidative and inflammatory load that builds up over time.

Two of its roles interest researchers most, and they're the two this article follows: how it interacts with the nervous system to support calm and sleep, and how it acts on cells as they age.

Calm and sleep

Chamomile's reputation as a bedtime drink isn't folklore. Apigenin is the reason for it. Apigenin binds to GABA-A receptors, the system the brain uses to dial down activity and shift toward rest. That's the same target many calming agents act on, and it's why apigenin is recognized as the relaxing component of chamomile.

What makes it appealing is how it works. Apigenin supports the body's natural transition into sleep rather than forcing it, so the effect is calm and settled rather than the heavy grogginess of a sleeping pill. It's the kind of gentle wind-down most people are actually looking for at the end of the day.

The clinical picture backs this up. A systematic review and meta-analysis found that chamomile improved sleep quality and eased general anxiety. That result maps directly onto the GABA-A mechanism apigenin provides, which is why apigenin has become one of the compounds people reach for first when they want natural support for rest.

Why sleep is a longevity issue

It's easy to file sleep under "tomorrow" rather than "the long term." The biology says otherwise. Sleep is when much of the body's repair happens: cellular clean-up, memory consolidation, hormonal reset, and recovery of the immune and metabolic systems. Sleep well consistently and those systems get their nightly maintenance window. Sleep badly and they don't, which is why poor sleep tracks so closely with the markers of accelerated aging.

That's what makes a calming compound a longevity ingredient, not just a nighttime one. Aging well is downstream of sleeping well. For a lot of people, better rest is the most immediate way longevity support shows up in daily life, and apigenin's role in it is one of the most tangible things in the whole formula.

The cellular side: protecting NAD+

Apigenin's second role is where longevity researchers pay close attention. NAD+ is a coenzyme every cell relies on for energy, DNA repair and the activity of the sirtuins, the proteins most tied to healthy aging. NAD+ falls as we get older, and a major reason is an enzyme called CD38, which consumes NAD+ and climbs with age as a primary driver of that decline.

Apigenin acts directly on that enzyme. A landmark study identified apigenin as an inhibitor of CD38, and showed that inhibiting CD38 with apigenin raised NAD+ levels and improved metabolic markers. That's a meaningful distinction: rather than adding raw material like NMN does, apigenin helps slow the drain on the NAD+ the body already has. The two approaches work from opposite ends of the same problem, which is exactly why they belong together in one formula.

Apigenin also acts on senescent cells, the aged cells that stop dividing but stay behind and leak inflammatory signals that speed up aging in the tissue around them. More research found apigenin suppressed that inflammatory output and improved a range of age-related measures. It's the same theme running through everything apigenin does: helping the body hold onto what keeps cells functioning young.

Apigenin vs. getting it from food

Since apigenin turns up in everyday foods, it's fair to ask whether it's worth thinking about separately. The answer comes down to concentration and consistency. The amounts in a cup of tea or a sprig of parsley are small and variable, and apigenin has relatively low bioavailability, so the body absorbs only a fraction of what's there. Food exposure is real, but it's incidental. It depends entirely on what you happened to eat or drink that day.

A daily formula works the other way around. The same inputs, in the same place, every day, without having to plan a diet around them or hope you drank enough chamomile. That's the version of apigenin the research is built on, and it's the version Tmrw delivers: consistent, alongside 87 other longevity ingredients, as part of one routine you don't have to think about.

Why it's in Tmrw

Apigenin sits in Tmrw's Longevity Activation blend, working alongside the other flavonoids and polyphenols that target cellular aging from different directions. It brings two things to the formula that few single ingredients do: it supports calm and rest at the end of the day, and it helps protect NAD+, the molecule the rest of the cellular-energy system depends on.

That's the logic behind the whole formula. Tmrw is built around the 12 hallmarks of aging, so every ingredient is chosen for how it reinforces the others, not just for its own headline. Apigenin earns its place on both counts: the part you feel tonight, and the part working at the level of your cells for years.

Tmrw contains 88 longevity ingredients, including apigenin, formulated to address all 12 hallmarks of aging. NSF Certified for Sport. Made in New Zealand.

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Sources

• Hieu TH, et al. Therapeutic efficacy and safety of chamomile for state anxiety, generalized anxiety disorder, insomnia, and sleep quality: A systematic review and meta-analysis. Phytotherapy Research, 2019. https://onlinelibrary.wiley.com/doi/10.1002/ptr.6349

• Camacho-Pereira J, et al. CD38 Dictates Age-Related NAD Decline and Mitochondrial Dysfunction Through an SIRT3-Dependent Mechanism. Cell Metabolism, 2016. https://www.cell.com/cell-metabolism/fulltext/S1550-4131(16)30224-8

• Escande C, et al. Flavonoid Apigenin Is an Inhibitor of the NAD+ase CD38. Diabetes, 2013. https://pmc.ncbi.nlm.nih.gov/articles/PMC3609577

• Zhang, et al. Targeting Senescence with Apigenin Improves Chemotherapeutic Efficacy and Ameliorates Age-Related Conditions in Mice. Advanced Science, 2025. https://advanced.onlinelibrary.wiley.com/doi/full/10.1002/advs.202412950