The synergy between Ergothioneine and Nicotinamide Riboside

What is Energy-Damage Paradox?

Two billion of years ago, mitochondria emerged from the obscure, fueling the rise of complex life on earth. Since then, the aerobic respiration has gone mainstream. This process, however, presents a unique challenge called ”Energy-Damage Paradox.”

Simply put, there is a trade-off: On one hand, to survive and thrive cells must generate energy by using oxygen as the electron sink. This electron-shuffling is by no means error-free. When an electron goes astray, reactive oxygen species (ROS) are generated. On the other hand, to survive and thrive cells must limit the damage by actively eliminating ROS. The failure to do so will lead to the oxidative stress, which is linked to many medical conditions as well as premature ageing.

How do Cells “Fire Off” and “Cool Off” the Engine?

Among antioxidants discussed previously, ergothioneine (EGT) and nicotinamide riboside (NR) are a formidable powerhouse “stack” for cellular resilience.

NR is a potent precursor to NAD+, a coenzyme essential for the production of ATP (universal energy currency). Taking NR will result in a higher metabolic activity, which naturally increases the production of ROS. In this sense, NR can be seen as the fuel to the fire, or the Yang.

EGT is a powerful antioxidant. Taking EGT helps prevent the high-stress areas such as mitochondria and nucleus from extensive oxidative damage by ROS. In this sense, EGT can be seen as the shield from the fire, or the Ying.

A 2025 clinical study on "mitochondrial fitness" suggested that by neutralizing ROS during increased NAD+ metabolism, EGT allows the mitochondria to operate at a higher capacity for a longer period. Here, Ying and Yang are in harmony.

Which Biological Pathways are Involved?

To produce the maximal energy in a sustainable way, cells monitor closely the following two key pathways, where EGT and NR interact indirectly:

• Sirtuin Pathway
  • NR is well-known for activating SIRT1, a gene associated with DNA repair and longevity. This is a built-in self-defense mechanism.
  • EGT, meanwhile, activates SIRT1 and SIRT6. It also stimulates an enzyme called GPDH, which in turn increases the formation of NAD+ within the cell.
• Nrf2 Pathway
  • EGT, as discussed before, has been shown to upregulate the Nrf2 gene, our "master antioxidant switch."
  • NR, meanwhile, comes into play through a “bio-energy” feedback loop. Many enzymes along the Nrf2 pathway require NADPH (thus NDA+) as coenzymes. NR adds to the cellular poll of NAD+ available.

Which Body Parts do We Benefit?

Those two, if taken together, can benefit our brain and skin a great deal, studies have shown.

• Neuroprotection
  Both compounds can cross the blood-brain barrier. While NR is busy supporting the high energy demands by the neurons during a period of intense executive function, EGT is there to prevent the neuro-inflammation that may lead to cognitive decline.
• Dermaprotection
  Results from a 2025, randomized controlled trial concluded that, when paired with NAD+ precursors like NR, EGT helped participants to show signs of :
  • Reduction in melanin and erythema
  • Improvement in skin glossiness and elasticity
  • Reduction in UV-induced fine lines.

What are the Stacking Dosages Used in Studies?

For rials with results published after 2024, the stacking is the following:

• To align with circadian NAD+ peaks, take 300 to 1,000 mg of NR in the morning
• Since EGT is relatively stable, take 5 to 25 mg any time during the day.