What is Tru Niagen Immune and who is it for?
Tru Niagen Immune is a daily capsule combining 100mg of patented Niagen® nicotinamide riboside (NR) with four immune-essential nutrients: Vitamin D3, Vitamin C, zinc (in two bioavailable forms), and selenium. It’s designed for adults who want year-round cellular and immune wellness support, not just a seasonal high-dose intervention when something has already gone wrong.
You might consider this if you’re already taking or interested in NAD+ precursors and want a formulation that pairs that cellular foundation with research-aligned doses of key immune nutrients. It’s also designed to be used alongside regular Tru Niagen 300mg rather than as a standalone replacement, making it a practical addition to an existing NAD+ protocol rather than a first-step product.
Fairfield Nutrition Thoughts
NAD+ depletion during periods of immune stress is a genuinely interesting area of cellular biology. The idea that immune cell activation is energetically expensive, and that NAD+ availability may become a limiting factor during that process, is mechanistically plausible and supported by preclinical data. What makes Tru Niagen Immune worth considering is that it addresses this from two directions at once: the NAD+ substrate side via Niagen® NR, and the co-nutrient side via D3, C, zinc, and selenium.
Why This Formulation / How It Works
Most immune supplements focus entirely on vitamins and minerals without addressing the cellular energy demands that immune activity places on the body. Tru Niagen Immune takes a different approach by pairing Niagen® NR with four established immune nutrients. The 100mg Niagen® dose is lower than the standalone Tru Niagen 300mg product, which is why the manufacturer positions this as a complement to rather than a replacement for the standard formula.
The zinc formulation is worth noting: using both gluconate and citrate forms rather than a single salt is a practical approach to absorption, as different zinc forms may be absorbed via slightly different mechanisms. Vitamin D3 is included rather than D2, which research consistently shows raises serum 25-hydroxyvitamin D more effectively. Selenium rounds out the mineral side as a cofactor in glutathione peroxidase activity.
Niagen® NR as an NAD+ Precursor
Nicotinamide riboside enters cells and is phosphorylated to NMN, then to NAD+. NAD+ functions as a coenzyme in hundreds of redox reactions, including those central to cellular energy metabolism in the mitochondrial electron transport chain. Immune cells, particularly lymphocytes and macrophages, are metabolically active and draw heavily on NAD+ during activation. Research shows NAD+ levels can be substantially reduced during periods of immune stress.
Antioxidant Activity via Vitamin C and Selenium
Vitamin C provides antioxidant activity in aqueous cellular compartments and is a cofactor in several enzymatic reactions. Selenium is incorporated into selenoproteins, including glutathione peroxidases, which are involved in managing reactive oxygen species in cellular membranes. Both nutrients are involved in normal immune cell function at the biochemical level.
When to Consider This
This formulation provides nutritional support for immune wellness. It makes sense if you’re:
- Already using Tru Niagen 300mg and want to add targeted immune nutrient support alongside your NAD+ foundation.
- In a life stage or season where immune wellness is a higher priority, such as winter months, periods of increased physical or work demands, or travel.
- An adult over 40 where both NAD+ levels and Vitamin D status are areas commonly flagged by practitioners as worth attending to.
- Working with a practitioner on a broader cellular wellness protocol and looking for a daily-use immune nutrient formula with research-aligned doses.
Supplement strategy: Tru Niagen Immune is designed to be used alongside Tru Niagen 300mg, not as a standalone NAD+ supplement. Many people introduce this once they’ve established a baseline NAD+ protocol and want to layer in consistent immune nutrient support. It’s formulated for daily ongoing use rather than short-term acute loading.
⚠️ Not suitable for: Children under 18, pregnant or breastfeeding women without healthcare professional guidance, individuals with known hypersensitivity to any listed ingredient.
How to Use
Adults take one capsule daily with food, or as recommended by your healthcare professional. Each capsule provides 100mg of Niagen® NR alongside 350 IU Vitamin D3, 180mg Vitamin C, 15mg zinc (as gluconate and citrate), and 90mcg selenium.
Tru Niagen recommends using this alongside their standard Tru Niagen 300mg formula for a more complete NAD+ protocol, though Tru Niagen Immune can be used independently. If combining both products, taking them at the same time with food is straightforward.
Ingredients
Per capsule (1 capsule serving):
Niagen® (Nicotinamide Riboside) | 100mg
Vitamin C (Ascorbic Acid) | 180mg
Zinc (as Gluconate and Citrate) | 15mg
Selenium | 90mcg
Vitamin D3 (Cholecalciferol) | 350 IU
Other ingredients: Acacia, Ascorbic Acid, Calcium Hydrogen Phosphate Dihydrate, D-alpha-tocopherol, Hypromellose (capsule shell), Magnesium Stearate, Medium Chain Triglycerides, Microcrystalline Cellulose, Tapioca Starch, Tricalcium Phosphate.
Allergen information: Free from common allergens. Capsule shell is Hypromellose (vegetarian-suitable).
Common Questions
Can I take this instead of my regular Tru Niagen 300mg?
Tru Niagen Immune contains 100mg of Niagen® NR, whereas the standard Tru Niagen provides 300mg. The manufacturer designs these to be used together rather than as substitutes. If budget or capsule count is a consideration, that’s worth discussing with your practitioner.
Why does this only have 100mg of Niagen® when the standard product has 300mg?
The lower Niagen® dose reflects that this product is formulated as a complement to the standard Tru Niagen, not a replacement. The remaining capsule space is used for the immune nutrient blend. If you’re using both products together, your total daily Niagen® NR intake would be 400mg.
Why are there two forms of zinc in this formula?
Zinc gluconate and zinc citrate are both well-absorbed organic zinc forms. Using two forms may offer absorption across slightly different pathways and is generally gentler on the digestive system than zinc oxide, which is common in lower-cost formulations.
How quickly does Niagen® NR raise NAD+ levels?
Clinical studies show measurable increases in blood NAD+ levels within hours of a first dose, with significant elevations observed within two weeks of consistent daily use. Cellular changes take time to accumulate, so daily consistency matters more than any single dose.
Warnings & Storage
Do not use if: You are pregnant or breastfeeding without first consulting your healthcare professional. Not recommended for children under 18.
Cautions: Consult your healthcare professional before use if you have any pre-existing health conditions, are taking medications (particularly immunosuppressants or anticoagulants), or are scheduled for surgery. Selenium intake from all sources should be monitored; excessive selenium intake over time is not advisable.
Storage: Store in a cool, dry place away from direct sunlight. Keep out of reach of children.
Always consult your healthcare professional before use if you have any pre-existing conditions or are taking medications.




