🧬 Sirtuins SIRT1-SIRT7: Role in DNA Repair and Lifespan
Regulatory proteins linked to longevity — let's look at the mechanisms and activators
Sirtuins are a family of proteins that regulate metabolism, DNA repair and aging. They are linked to lifespan extension in model organisms. This is one of the most studied topics in anti-aging medicine.
Sirtuins depend on NAD+ — an important energy molecule of the cell. Their activation is linked to fasting, some substances and lifestyle. Let's look at what science knows and what actually works.
What are sirtuins
Sirtuins are a family of proteins (SIRT1-SIRT7) that regulate many processes: metabolism, DNA repair, inflammation and aging. Their activity depends on NAD+.
The SIRT1-7 family
The family includes 7 proteins that work in different parts of the cell and perform different functions.
| Sirtuin | Location | Main role |
|---|---|---|
| SIRT1 | Nucleus | Metabolism, stress |
| SIRT3 | Mitochondria | Energy, mitochondria |
| SIRT6 | Nucleus | DNA repair |
| SIRT7 | Nucleus | Ribosomes, stress |
DNA repair
Some sirtuins (especially SIRT6 and SIRT1) participate in repairing DNA damage. This matters because the accumulation of damage is linked to aging.
NAD+ and activation
Sirtuins need the cofactor NAD+ to work. With age, NAD+ levels decline, which is linked to lower sirtuin activity.
Resveratrol
Resveratrol is a polyphenol often linked to SIRT1 activation. It is found in grapes, berries and red wine.
Fasting and lifestyle
The most natural way to support sirtuin activity is lifestyle and nutrition.
Pauses in eating
Calorie restriction and pauses are linked to activation of SIRT1 and AMPK.
Movement
Exercise affects metabolic pathways linked to sirtuins.
Recovery
Good sleep supports the cell's repair processes.
Nutrition
Berries, vegetables and polyphenols support cellular protection.
What matters
How to sensibly approach sirtuins.
Lifestyle is the foundation
Fasting, activity, sleep and nutrition affect sirtuins naturally.
NAD+ is an interesting topic
NAD+ precursors are studied, but human data are still forming.
Resveratrol — moderately
Data are promising, but the effect in humans is moderate. Not a "miracle".
No extremes
Do not believe promises to "turn on sirtuins" with one pill. The approach is complex.
What are sirtuins?
A family of proteins SIRT1-7 that regulate metabolism, DNA repair, inflammation and aging.
How are sirtuins linked to longevity?
They help repair DNA and adapt to stress. Their activation is linked to lifespan extension in animals.
What activates sirtuins?
NAD+, fasting, physical activity and some substances (resveratrol) are linked to sirtuin activation.
Is NAD+ needed for sirtuins?
Yes, NAD+ is a sirtuin cofactor. Its level declines with age, which is linked to lower sirtuin activity.
Does resveratrol help activate sirtuins?
In laboratory studies, yes, it activates SIRT1. In humans the effect is less pronounced and depends on bioavailability.
How does fasting affect sirtuins?
Calorie restriction and pauses in eating are linked to activation of SIRT1 and related pathways (AMPK).
How many sirtuins does a human have?
Seven (SIRT1-SIRT7). They work in different parts of the cell and perform different functions.
Are there sirtuin activators in supplements?
Some substances (resveratrol, NMN, NR) are studied. But "turning on sirtuins" with one pill is a simplification.
Are sirtuins linked to DNA repair?
Yes, especially SIRT6 and SIRT1 participate in repairing DNA damage and maintaining genome stability.
What to do to support sirtuins?
A healthy lifestyle: fasting/pauses in eating, activity, sleep, nutrition with polyphenols and vegetables.