Most NAD+ protocols fall into a fairly narrow range: 250–1,000 mg per week, typically split across two to three subcutaneous or intramuscular injections, or delivered as one to two weekly IV infusions. Clinics generally start patients on a short loading phase at the higher end of that range, then taper to a lower maintenance dose once energy and cognitive benefits stabilize. The right NAD+ dosage and timing for you depends on your delivery method, your goals, and how your body responds over the first few weeks — which is why “how much” and “how often” are really two separate questions.
How Much NAD+ Should You Take?
NAD+ dosing is typically described in milligrams per week rather than per dose, since most patients split their weekly total across multiple sessions. Clinical protocols vary by delivery route, so the numbers below are general ranges rather than a fixed prescription — your provider should adjust based on your labs, symptoms, and how you tolerate the first few doses.
Injection Dosing Ranges
Subcutaneous or intramuscular NAD+ injections commonly range from 50–100 mg per injection, given two to three times per week for a weekly total of roughly 100–300 mg. Some higher-intensity protocols run closer to 500 mg per week for patients specifically targeting fatigue or cellular aging support, though evidence at the higher end is thinner than for lower, more conservative dosing.
IV Infusion Dosing Ranges
IV infusions deliver NAD+ directly into the bloodstream, which allows for larger single doses than injections typically permit. A single infusion may range from 250–1,000 mg, depending on infusion speed and the clinic’s protocol, with slower infusions generally better tolerated. Because IV sessions require more time and clinical oversight, most patients space these out to once weekly or every other week rather than the multiple-times-per-week schedule used for injections.
How Often Should You Take NAD+?
Frequency depends heavily on delivery method and where you are in treatment. Injections are generally dosed more frequently (two to three times weekly) because each dose is smaller; IV infusions are dosed less frequently (weekly or biweekly) because each session delivers a larger amount at once.
Loading Phase vs. Maintenance Phase
Many NAD+ protocols use a two-phase structure. During an initial loading phase — often the first two to four weeks — dosing frequency and/or amount sits at the higher end of the range to help replenish cellular NAD+ levels more quickly. Once patients report stable improvements in energy, sleep, or mental clarity, providers commonly taper to a lower-frequency maintenance schedule, such as once weekly injections or a monthly IV infusion, to sustain results without over-dosing.
Some patients report needing longer at the loading dose before benefits appear, while others notice changes within the first one to two weeks. Clinical studies suggest individual response varies based on baseline NAD+ levels, age, and overall metabolic health, which is part of why a fixed, one-size-fits-all schedule doesn’t work well for this therapy.
Best Time of Day to Take NAD+
NAD+ is generally associated with increased alertness and energy, so most protocols recommend morning or early-afternoon dosing rather than evening administration, particularly for patients who report a mild stimulating effect. That said, the research on optimal timing is limited, and some patients — including those adjusting to irregular schedules — find that dosing timing matters less than dosing consistency. If you work rotating or overnight shifts, timing your dose to the start of your “day” (whenever that falls) rather than the clock is a reasonable approach; our guide on NAD+ for fatigue and cellular aging covers this in more detail for shift-based schedules.
Signs Your NAD+ Dose or Schedule Needs Adjusting
Because NAD+ dosing isn’t one-size-fits-all, it’s worth tracking how you respond over the first several sessions. A few signals worth flagging to your provider:
- No noticeable change in energy or focus after 3–4 weeks at your current dose or frequency
- Mild nausea, flushing, or lightheadedness during infusions, which may resolve with a slower infusion rate rather than a lower dose
- Sleep disruption when dosing later in the day
- Diminishing returns after an initial period of improvement, which may indicate it’s time to shift from loading to maintenance dosing (or vice versa)
For a full breakdown of what NAD+ does at the cellular level — which helps explain why dosing and timing affect people differently — see our guide to how NAD+ works.
Frequently Asked Questions
How much NAD+ should I take per week?
Most patients use a weekly total between 100–1,000 mg, depending on delivery method (injection vs. IV) and whether they’re in an initial loading phase or ongoing maintenance. Your provider should set your specific target based on your goals and how you respond to the first few doses.
Can you take NAD+ too often?
Dosing more frequently than your protocol recommends doesn’t necessarily speed up results and may increase the likelihood of side effects like nausea or flushing, particularly with IV infusions given too quickly. Sticking to a consistent, provider-guided schedule is generally more effective than increasing frequency on your own.
Should I take NAD+ in the morning or at night?
Morning or early-afternoon dosing is the more common recommendation, since some patients report a mild energizing effect that can interfere with sleep if dosed too late in the day. Consistency in timing matters more than the exact hour you choose.
Getting NAD+ dosing and timing right is easier with provider guidance tailored to your goals and how your body responds. Explore RespondWell’s treatment options to find a protocol — and a schedule — that fits.