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I. Core physiological functions
1. Participation in energy metabolism
When sugars, fats, and proteins are broken down for energy, NAD⁺ receives hydrogen and is converted into NADH, which is then used in mitochondria to generate ATP (cellular energy).
Without NAD⁺, cells cannot produce energy and will lose their activity directly.
2. Activate the longevity protein Sirtuins
The Sirtuins family proteins must rely on NAD⁺ to be activated:
- Repair damaged DNA
- Regulate cellular aging and slow down cellular aging
- Improve mitochondrial function and reduce oxidative stress
- Regulate inflammation and maintain metabolic homeostasis
3. DNA Damage Repair
PARP (a DNA repair enzyme) works highly dependent on NAD⁺.
When cells are exposed to radiation or oxidative stress and suffer DNA damage, PARP consumes NAD⁺ to repair the genes; when NAD⁺ is insufficient, the damage accumulates, accelerating aging and increasing the risk of diseases.
4. Regulating apoptosis and maintaining cellular homeostasis
Balancing cell survival and programmed cell death, eliminating damaged and senescent cells; maintaining the normal cell cycle.
5. Immune and Inflammation Regulation
It participates in the energy supply of immune cells and regulates inflammatory factors; low NAD⁺ is prone to cause chronic low-level inflammation (aging-related inflammation).
6. Neurological protection
- Supports the energy supply of neurons
- Maintains synaptic functions, improves cognitive and memory-related mechanisms

Hong Kong Biopetide Research Limited is a high-tech enterprise specializing in the research, development, production, and sales of peptide products. The company boasts advanced laboratories and a rigorous quality control system, with its products having obtained multiple international certifications, ensuring safety and efficacy.
Its customers are spread across Europe, the United States, Southeast Asia, the Middle East, and other regions.
Biotechnology Co., Ltd. is a high-tech enterprise specializing in the research, development, production, and sales of peptide products. With advanced laboratories and a rigorous quality control system, our products have obtained international certification, ensuring safety and efficacy.
As a global trading company, we provide customized solutions to customers across Europe, the United States, Southeast Asia, the Middle East, and many other regions. Upholding the philosophy of "technology leading health," we are committed to innovation, striving to deliver high-quality health products to consumers worldwide. Our business principles focus on establishing a strong domestic market presence, increasing R&D investment, manufacturing premium products, and leveraging technology to promote environmental protection and sustainable development. At the same time, we actively expand into international markets, serve society with sincerity, and aim to become a modern, eco-friendly, and technologically advanced enterprise that meets global standards. Contact Us

Our products have been exported to 130 countries and regions. We are committed to building stable, strategic, and long-term partnerships with suppliers and customers both domestically and internationally, working together to create a brighter future.

1. We are the source factory of raw materials, offering high-quality and high-purity raw materials at wholesale prices.
2. We can provide global delivery services and have an exclusive delivery team to ensure safety and speed.
3. You can contact us to inquire about any products. Our product range is extensive and we support customization to meet your needs as much as possible.
4. We support various payment methods and all details can be negotiated.
5. If you have any questions, please feel free to contact me. I will do my best to answer your questions for you.
6. Firstly, we guarantee the quality of the products; secondly, we guarantee the efficiency of transportation and the clearance rate; thirdly, we will provide you with the best service in all aspects.

You get what you pay for. If you have any questions, I will answer them all.

We mainly adopt dedicated logistics and FedEx transportation methods, which can ensure timely shipment, quick delivery, stable logistics tracking, and safe and punctual delivery.