Tru Niagen is a capsule brand built around one ingredient, NIAGEN (nicotinamide riboside). NAD+ is the molecule itself, the one that supplement makers and clinics say they raise. So you are really choosing between a daily product with a labelled dose and a wider category that includes IV and injection clinics. Here is how the two compare on what they are, what they cost, side effects, refunds and research, so you can decide with the facts in front of you.
The table gives the side-by-side view. Each row is explained in the sections that follow.
| Point | Tru Niagen 300mg | NAD+ |
|---|---|---|
| What it is | Capsules; the brand says its key ingredient is NIAGEN (nicotinamide riboside) | The coenzyme nicotinamide adenine dinucleotide, sold as supplements and IV infusions |
| Who sells it | Niagen Bioscience | Clinics and supplement sellers |
| Amount per serving | 300mg NIAGEN per one-capsule serving, per the Supplement Facts panel | Set by each product or clinic |
| Price | $49.00 one-time for 30 capsules; $39.20 a month on subscription (prices as of October 21, 2026) | Set by each seller; ask for the full total before you book |
| Cost per day | About $1.63 on a one-time bottle; about $1.31 on the monthly subscription | Ask for the cost per visit and per month in writing |
| Refund | Items in original condition with packaging intact, returned within 30 days of purchase | Set by each seller; get the policy in writing |
| Side effects in research | Bloating, upset stomach or flushing were the most common mild effects in NR trials at 1,000 to 2,000mg | Nausea, fatigue, headache or flushing, per Atria's NAD+ article |
| Best fit | A daily capsule with a labelled amount and a monthly cost you can plan for | Someone who has talked it over with a clinician and has the terms in writing |
What each one is and who sells it
Tru Niagen is the brand name for capsules that contain NIAGEN, a patented form of nicotinamide riboside (NR). The product page calls NIAGEN its ‘key ingredient' and says the product is ‘Made in the U.S. with globally sourced components.' The site's terms name ChromaDex, Inc., a subsidiary of Niagen Bioscience, Inc., as the operator of the site. The contact page lists customer care contacts and a returns portal.
NAD+ is the short name for nicotinamide adenine dinucleotide. Innerbody's Tru Niagen review, last updated December 2023, explains that despite its name, nicotinamide is unrelated to nicotine. Your cells use NAD+ as a helper molecule for energy production and repair, and Atria's NAD+ article notes that NAD+ levels naturally decline as we age. You will see NAD+ sold as capsules and as IV infusions, and Atria argues that the science is more cautious than the marketing around both.
Is Niagen the same as NAD?
No. Niagen is a brand name for nicotinamide riboside, which is a precursor. Your body converts it into NAD+. The 2023 review of NR in humans describes nicotinamide riboside as ‘a precursor to the important cofactor nicotinamide adenine dinucleotide.'
Is it better to take NAD+ or nicotinamide?
Most orally taken NR does not circulate unchanged. The same 2023 review explains that most orally taken NR is converted in the gut to nicotinamide, and that the NAD+ precursors circulating after a dose are mainly nicotinic acid and nicotinamide. The 2023 review does not compare forms of NAD+ precursors. It concludes that oral NR ‘has displayed few clinically relevant effects,' and it warns that the literature tends to exaggerate reported effects.
What is in each one
The Supplement Facts panel for Tru Niagen 300mg lists ‘NIAGEN® 300mg (nicotinamide riboside chloride)' per one vegetarian capsule, with the note ‘Daily Value Not Established.' The product page says to take ‘1 capsule per day for optimal NAD+ support.' It also says each batch is verified by third-party labs and that a certificate of analysis is available on its Quality page. The same questions apply when you read one, and our nmn certificate of analysis guide walks through what to look for.
The label also prints the words ‘Clinically proven.' To test a label claim like that against the research, start with reading supplement claims against the research.
NAD+ products and clinic infusions do not share one formula or dose. The amount depends on the product or clinic, so ask for the exact ingredient and amount in writing before you start.
What the research on NR shows
The most useful summary is the 2023 review of 25 published human NR studies. Its conclusion is that oral NR ‘has displayed few clinically relevant effects,' and that NR ‘may play a role in the reduction of inflammatory states.' It also says the putative clinical potential ‘remains to be understood.'
The Tru Niagen product page says the 300mg daily serving ‘is clinically shown to increase NAD+ levels by over 50% in most individuals.' Innerbody's review puts the same figure at eight weeks on the Tru Niagen dose. Raising NAD+ in the blood is a different question from whether it changes health outcomes, and the research on that second question is still limited.
The product page lists ten clinical trials by year, starting in 2016. One registered study is worth knowing about. The ClinicalTrials.gov registration for the Tru Niagen study describes a double-blind crossover trial of 300 mg/d and 1000 mg/d of TRU NIAGEN against placebo, on cognitive function, mood and sleep in people over 55. It lists the status as completed and 40 participants planned or enrolled. A registration describes a study; it is not a result, so read the published report before you rely on it.
Side effects, interactions and who should ask a clinician first
In the NR trials Innerbody reviewed, which used 1,000 to 2,000mg, side effects were ‘rare and mild.' The most common were bloating, upset stomach or flushing, and the review's list also includes nausea, headache, indigestion and diarrhea. Most of these trials ran for 12 weeks or less.
Long-term use is the open question. A 2022 review of NAD+ boosting strategies points to ‘the lack of long-term safety studies' and calls for more trials to set the proper dose and duration.
Cancer is an open safety question in the research: Atria's article says experts urge caution and that people with active cancer or at high risk should avoid NAD+ boosters until more is known. Atria's article cites an animal study in which high doses of NR appeared to increase the risk of aggressive breast cancer in mice. Innerbody advises anyone with a cancer risk to talk with a physician before taking NAD-boosting supplements.
Blood pressure has come up in this research too. In a 2018 trial of 24 middle-aged and elderly volunteers taking 1000 mg of NR daily for six weeks, the reviewed report noted that NR reduced blood pressure and arterial stiffness, and it adds that ‘these findings have not been supported by other reports.' In the largest trial, which ran eight weeks, blood pressure and heart rate ‘remained unaltered.' If blood pressure is your concern, the CDC guide to managing high blood pressure lists these healthy lifestyle habits: get regular physical activity, eat healthy foods, maintain a healthy weight and do not smoke. For daily food habits that fit this plan, see Nutrition and Everyday Wellness.
On interactions, the CDC says: ‘Some over-the-counter medicines, such as nasal decongestants, can raise blood pressure or interact with blood pressure medicines. Tell your health care team about any prescription medicines, over-the-counter medicines, vitamins, or supplements you take.' The MedlinePlus guide to preventing high blood pressure also lists NSAID pain relievers and decongestants among medicines that can raise blood pressure. Tru Niagen's FAQ page lists questions on alcohol, multivitamins and NSAIDs, so read those answers on the page.
For NAD+ clinic infusions, Atria's article notes that more than 70 published studies suggest NAD+ supplements are generally well tolerated, with typical side effects of nausea, fatigue, headache or flushing. Its authors also say experts urge caution, especially for long-term use.
Our tip for today: write down every medicine, vitamin and supplement you take, and take that list to your pharmacist before you start either one. Do not stop any prescribed medicine without talking to your health care team first.
Price per bottle and per day
These prices are from the Tru Niagen product page as of October 21, 2026. Prices and bundles change, so check the checkout for today's price.
- One-time purchase: $49.00 for 30 capsules, $1.63 each. At one capsule a day, that is about $1.63 a day.
- 1-month subscription: $39.20, $1.31 each, with 20% off recurring orders. That is about $1.31 a day.
- 3-month subscription: $101.60, $1.13 each, with 30% off recurring orders.
- 6-month subscription: $195.20, $1.08 each, with 33% off recurring orders.
The page says you can pause, skip or cancel the subscription anytime, and the site offers 10% off a first order when you join its email list. NAD+ prices are set by each seller, so ask for the full total per visit and per month before you book.
Refund, guarantee and shipping
The Tru Niagen returns section says: ‘Items must be returned within 30 days from the date of purchase. Items must be in their original condition with packaging intact.' Returns start through the seller's returns portal, linked from its contact page. The product page says ‘Free U.S. shipping on every order, always.'
That is the main difference a careful buyer should weigh: a one-month plan is hard to undo once the bottle is open. For NAD+, refund terms are set by each seller, so get them in writing before you pay.
What buyers see in reviews
As of October 21, 2026, the Tru Niagen product page shows 4.5 out of 5 stars from 622 reviews: 447 five-star, 70 four-star, 71 three-star, 19 two-star and 15 one-star. These are the seller's own figures, not a quality rating.
Another reported an inaccurate arrival date and ordered a second bottle elsewhere so they would not run out.
Who each one suits
Tru Niagen suits someone who wants a daily capsule with a labelled 300mg amount, a monthly cost they can plan for, and who will check the 30-day return rule before ordering. A NAD+ clinic option suits someone who has already talked it over with a clinician and has the total price and refund terms in writing.
Before you order: questions to settle
If you have cancer or a history of it, or you take blood pressure medicine or other daily medicines, talk with your provider before you start either option.
- Do you want a capsule you take at home, or a clinic visit? That choice shapes everything else.
- Does your clinician or pharmacist see a problem with any medicine, vitamin or supplement you take?
- Can you keep the cost going for a year? On the monthly plan it is about $1.31 a day.
- Can you keep the bottle in its original condition with the packaging intact if you may want to return it within 30 days?
- Call Tru Niagen customer care at (888) 642-4361, Monday to Friday, 7am to 5pm PT, or email customercare@truniagen.com. Ask for the current return steps and for the certificate of analysis for your bottle.
- For a clinic, ask for the total price and the refund terms in writing before you pay.
By the Senior Safety Desk Editorial Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.