Resveratrol has become one of the most widely discussed compounds in the field of healthy ageing and longevity research. Naturally found in foods such as grapes and berries, it has attracted attention for its association with cellular defence systems and stress-response pathways. These appear to become increasingly important as we age.
Despite its popularity, resveratrol is often misunderstood. On its own, it does not increase Nicotinamide Adenine Dinucleotide (NAD) levels, nor does it directly provide energy to cells. To understand where resveratrol fits, and why it is so often discussed alongside NAD+ precursors, it is necessary to look more closely at what resveratrol actually does inside the body, how sirtuins function, and why NAD+ availability plays such a central role.
What Is Resveratrol and What Does It Do?
Resveratrol is a polyphenol, most commonly extracted from Japanese knotweed for use in supplements. Rather than acting as a direct energy source or nutrient, resveratrol influences how cells respond to metabolic and environmental stress. Resveratrol exists in two forms, known as isomers, but trans-resveratrol is the stable, biologically active form used in most research.
It is commonly found in plants, with higher levels being detected when the plant has experienced some kind of environmental stress (droughts, temperature fluctuations, nutrient deficiency, high salinity etc). Resveratrol is an output of stress-response signalling in plants. When a plant experiences stress, a signalling pathway is activated to up-regulate defensive enzymes, antioxidant systems and protective secondary metabolites. Enzymes, such as stilbene synthase, are activated and resveratrol is produced as a phytoalexin and accumulates at sites of stress or damage (1). The theory popularised by longevity researchers, such as Dr David Sinclair, suggests that we have evolved to recognise this stress signal in our diets. Our genes appear to respond to resveratrol to tell our cells that there must be stress in the environment and so we must protect ourselves better, switching on our own survival pathways (2).
One example of this is observed in Pinot Noir, which has been measured to contain relatively larger amounts of resveratrol compared to other wines (3). Pinot Noir grapes are often grown in cooler, more challenging environments and have thinner skins. This makes them more reliant on their natural chemical defence mechanisms, such as those that produce resveratrol as an output.
In humans, its most notable role is in its interaction with the sirtuin family of genes, which are involved with cellular protection and maintenance pathways. These pathways help cells adapt to stress, regulate metabolic activity, and maintain normal function over time. This is why resveratrol is frequently described as mimicking some of the molecular effects seen during calorie restriction (4), a state long associated with improved cellular resilience.
Understanding Sirtuins and Their Role in Ageing
Sirtuins are a family of genes, the first of which was discovered nearly 40 years ago. They play a key role in maintaining cellular stability. Humans have 7 of these genes in the sirtuin family, simply named SIRT1 – SIRT7. The exact role each of these sirtuins plays in the body is very complex and often has overlapping, or interacting effects. They also have interacting effects with other genes, such as AMPK. Suffice it to say they play a vital role in cellular processes such as gene regulation and stability, stress response, regulation and resistance, metabolism, DNA maintenance and repair, cell cycles, as well as inflammation control. These processes are vital for health and vitality at a cellular level. Because of this, Sirtuins are often described as part of the body’s internal system for preserving normal cellular function over time. Reduced sirtuin activity is associated with diminished cellular maintenance, allowing damage to accumulate over time and contributing to age-related decline (5).
What is crucial to understand is that sirtuins do not operate independently. In order to function, they require NAD+, a molecule that acts as a co-factor in many fundamental cellular processes. This dependency creates an important limitation. As NAD+ levels decline with age, the activity of sirtuins becomes increasingly constrained.
Resveratrol is most strongly associated with SIRT1, with some indirect evidence suggesting influence on SIRT3 and possibly other sirtuins via downstream signalling (4). The evidence suggests that resveratrol enhances SIRT1 activity, but only if sufficient NAD+ is available (6) (7). So, what does that mean? SIRT1 helps to regulate DNA repair, inflammatory signalling, and metabolic processes and adaptation. Reduced activity of SIRT1 has been associated with increased inflammation, reduced stress resistance and metabolic dysfunction (8) (9) (10) (11) (12). This suggests that supplementing resveratrol alongside an NAD+ booster will help to maintain normal cellular function and repair which in turn may slow down or reduce the effects of cellular degeneration and ageing.
The Complementary Relationship Between NR and Resveratrol
Nicotinamide Riboside (NR) addresses the limitation from a different angle. Nicotinamide Riboside (NR) is a precursor to NAD+, meaning the body converts it into NAD+ inside cells, helping to replenish declining levels (13). When NR and resveratrol are taken together, they support the same biological system from opposite directions. NR helps restore NAD+ availability, while resveratrol encourages the activity of NAD+ dependent pathways. As Dr David Sinclair posed, NR is the fuel and resveratrol is the accelerator. Rather than competing, the two compounds complement one another.
This relationship helps explain why resveratrol is so often discussed alongside NAD+ precursors in longevity research. Supporting NAD+ supply allows pathways influenced by resveratrol to function more effectively, rather than being limited by an underlying shortage of NAD+.
Why Resveratrol Formulation Matters
Another important consideration with resveratrol is how it is delivered. Standard resveratrol has notoriously low oral bioavailability (14). It is rapidly metabolised and poorly absorbed, which limits the amount that ultimately reaches circulation.
Liposomal delivery systems are designed to address this issue by encapsulating resveratrol within lipid-based carriers. This approach can improve absorption and stability, making resveratrol more usable as part of a broader formulation rather than as a standalone ingredient (15).
When resveratrol is included to support NAD+ dependent pathways, ensuring that it is delivered in a form the body can actually use becomes especially important.
A More Structured Approach to NAD+ Support
Supporting long-term cellular function is not about relying on a single ingredient. It requires addressing both the availability of NAD+ and the pathways that depend on it. This is the rationale behind Timeless NAD+ Support, which combines Nicotinamide Riboside (NR) to support NAD+ levels with liposomal trans-resveratrol to support NAD+ dependent pathways. Also included is spermidine to complement a broader cellular renewal mechanism. Rather than stacking ingredients for marketing appeal, the formulation is built around how these systems interact inside the body.
References
1. The production of resveratrol by Vitis vinifera and other members of the Vitaceae as a response to infection or injury. Langcake, P and Pryce, R J. s.l. : Physiological Plant Pathology, 1976, Vol. 9, pp. 77-86.
2. Lifespan: Why We Age and Why We Don't Have To. 2019.
3. Relationship among antioxidant activity, vasodilation capacity, and phenolic content of red wines. Burns, J, Gardner, P T and O'Neil, J. 2, s.l. : J Agric Food Chem, 2000, Vol. 48, pp. 220-30.
4. Calorie restriction-like effects of 30 days of resveratrol supplementaion on energy metabolism and metabolic profile in obese humans. Timmers, Silvie, Konings, Ellen and Bilet, Lena. 5, s.l. : Cell Metab., 2011, Vol. 14, pp. 612-22.
5. The sirtuin family in health and disease. Qi-Jun, Wu, Tie-Ning, Zhang and Huan-Huan, Chen. 2022, s.l. : Signal Transduction and Targeted Therapy, 2022, Vol. 402.
6. NAD+ and sirtuins in aging and disease. Imai, Shin-ichiro and Guarente, Leonard. 8, s.l. : Trends Cell Biol., 2014, Vol. 24, pp. 464-71.
7. Mechanism of human SIRT1 activation by resveratrol. Borra, Margie T, Smith, Brian C and Denu, John M. 17, s.l. : J Biol Chem, 2005, Vol. 280, pp. 17187-95.
8. Mammalian sirtuins: biological insights and disease relevance. Haigis, Marcia A and Sinclair, David A. s.l. : Annu Rev Pathol, 2010, Vol. 5, pp. 253-95.
9. SIRT1 redistribution on chromatin promotes genomic stability but alters gene expression during aging. Oberdoerffer, Philipp, Michan, Shaday and McVay, Michael. 5, s.l. : Cell., 2008, Vol. 135, pp. 907-18.
10. Modulation of NF-kappaB-dependent transcription and cell survival by the SIRT1 deacetylase. Yeung, Fan, Hoberg, Jamie E and Ramsey, Catherine S. 12, s.l. : EMBO J., 2004, Vol. 23, pp. 2369-80.
11. Nutrient control of glucose homeostasis through a complex of PGC-1alpha and SIRT1. Rodgers, Joseph T', Lerin, Carlos and Haas, Wilhelm. 7029, s.l. : Nature., 2005, Vol. 434, pp. 113-8.
12. Sirtuins mediate mammalian metabolic responses to nutrient availability. Chalkiadaki, Angeliki and Guarente, Leonard. 5, s.l. : Nat Rev Endocrinol, 2012, Vol. 8, pp. 287-96.
13. The NAD+ precursor nicotinamide riboside enhances oxidative metabolism and protects against high-fat diet induced obesity. Canto, Carlos. s.l. : Cell Metab, 2012, Vol. 15, pp. 838-847.
14. Resveratrol and health - a comprehensive review of human clinical trials. Smoliga, James M, Baur, Joseph A and Hausenblas, Heather A. 8, s.l. : Mol Nutr Food Res., 2011, Vol. 55, pp. 1129-41.
15. Bioavailability of encapsulated resveratrol into nanoemulsion-based delivery systems. Sessa, Mariarenata, Balestrieri, Maria Luisa and Ferrari, Giovanna. s.l. : Food Chemistry, 2014, Vol. 147, pp. 42-50.
Author
This article was written by Adam Donley, Director at Everbright Labs. He holds a First-Class Master's Degree in Chemical Engineering with Chemistry from the University of Manchester and focuses on interpreting published research to translate nutritional science into practical guidance.
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