1. How do I know the expiry date?
The expiry date is printed on the bottom of each bottle of your product. We recommend that you store the product in a cool place, out of direct sunlight.


2. When will I see results after taking NMN? What are the effects?
The specific effects of NMN will manifest themselves in different ways in different individuals. People experiencing health problems or worries may start to feel improvements as early as 7-10 days and the effects of NMN may be reflected by a gradual improvement in sleep quality. People without health problems or worries usually feel an improvement in metabolism and daily energy levels within about 2-3 weeks. With long-term use, the gradual improvement in body function will become more and more apparent.


3. What is the recommended duration of NMN? How many capsules should I take?
icellsbio recommends that users take 1 to 2 capsules each morning on an empty stomach (1 capsule for those under 40 years of age and 2 capsules for those over 40 years of age, or as recommended by a health practitioner).


Shipping and Returns

1. What should I do if the package I receive is damaged?
Please feel free to contact us at or Whatsapp us at +852 6096 9409 and we are more than happy to do an exchange for you.


2. Do icells ship worldwide as well?
Yes, however, there may be additional shipping fees that will be included after you input the address and click check out.



1. What is the difference between NAD+ and NMN?
NAD+ is a coenzyme found in all living cells. NAD+ works in concert with the cell and is an essential process that supports the cell, enabling DNA optimisation, sleep pattern regulation and energy formation. NMN works synergistically at the cellular level to optimize mitochondrial function and restore NAD+ levels in youth.


2. What does the NMN actually do?

  • Maintain and improve health and skin condition
  • Improve cardiovascular health
  • Anti-aging
  • Improve stress and sleeping problems
  • Enhance concentration and memory
  • Improve mental and physical health comprehensively
  • Improve immune and digestive system
  • Improve mood.


3. What other scientific facts are behind NAD+ and NMN?
We have a wide range of research and authoritative information available to you, please visit the 'Research News' section of our website for more information.



1. Does NMN have any side effects? Am I suitable to take it?
There have been no adverse side effects associated with NMN supplementation in any studies, NAD+ is a coenzyme that is present in every cell in our body. Taking NMN is only to replace our original NAD+, it does not produce other chemicals. Of course, if you are pregnant, breastfeeding or undergoing cancer treatment, please consult your family doctor before use.


2. Is icellsbio NMN approved by the FDA?
As the supplement is not a drug, it is not FDA approved. However, icellsbio NMN and other products are manufactured in FDA - approved facilities and have been tested by multiple third - party laboratories.

The above statements have not been evaluated by the FDA. The products are not intended to diagnose, treat, cure or prevent any disease.


3. Are there any side effects or withdrawal symptoms when I stop taking NMN?
No. There is no evidence that you have experienced any side effects or withdrawal after stopping NMN. However, please remember that it is necessary to continue using our NMN to enjoy the full benefits of the premium NAD+ level.


4. How much should I take?
Taking into account the effectiveness and safety of human and animal studies and calculating the optimal dose of NMN, the recommended dose for adults aged 30 to 60 years is 500 mg per day. 750 mg per day can be safely taken by people aged 65 years and over to maximize the benefits of NMN.