When it comes to taking Wonderfeel NMN, age is a factor to consider. If you are under the age of 30, we do not recommend that you take any dose of Youngr NMN. This is because your body already produces high levels of NAD. Typically at this age the production of NAD begins to slow down, with changes that may not be noticeable for several years. For people over 30, it is safe to take Youngr NMN at the recommended dose of 900mg. Gender does not appear to have a significant effect on nicotinamide mononucleotide (NMN) dosage requirements based on current evidence. Currently, NMN studies in humans do not adjust dosing based on body weight. If you are concerned about NMN dosing, it is advisable to consult a healthcare professional who can assess your specific needs and make appropriate dosing recommendations.