You have been running on empty for so long that fatigue stopped feeling like a symptom and started feeling like your personality. Before you spend money on the wellness trend of the moment, it is worth asking a plainer question: what does your bloodwork actually say?
The tiredness that sleep no longer touches
There is a specific kind of exhaustion that shows up when you are the person everyone leans on. It is not the tiredness a good night fixes. It is a bone-deep drag that greets you before your feet hit the floor. Whether you are managing a parent's medications after a full workday or trying to think clearly at your desk eight weeks into fragmented newborn sleep, the instinct is the same: find the thing that gives energy back.
NAD+ (nicotinamide adenine dinucleotide) and its precursors get marketed hard for exactly this feeling. NAD+ is a real and important coenzyme involved in energy metabolism and cellular repair, and its biology is under active study [1]. But here is the part the marketing skips: fatigue is one of the least specific symptoms in medicine. Several common, correctable, and inexpensive-to-measure conditions produce the exact same drained feeling. Reaching for a supplement before you have looked at those is like buying a new car battery without checking whether you left the lights on.
This article is educational and is not medical advice. What follows is the panel an independent provider commonly reviews when someone reports persistent fatigue, and what each marker can reveal.
Source: [2] Iron-Deficiency Anemia (NHLBI, NIH), [4] Hypothyroidism (Underactive Thyroid) (NIDDK, NIH), [5] Vitamin B12 Fact Sheet for Health Professionals (NIH Office of Dietary Supplements), [6] Vitamin D Fact Sheet for Health Professionals (NIH Office of Dietary Supplements)
Iron and ferritin: the storage tank, not just the tank gauge
A standard blood count can look "normal" while your iron stores are running low. Ferritin is the marker that reflects stored iron, and it can fall before full anemia develops. Iron deficiency, with or without anemia, is a well-documented cause of fatigue, and it is especially common in menstruating and recently pregnant women [2][3].
This matters for two of the most overloaded groups imaginable: women in midlife still menstruating while carrying a caregiving load, and women in the months after giving birth, when iron stores are often depleted by pregnancy and delivery [3]. A provider looks at ferritin alongside a complete blood count precisely because the storage tank can be low while the surface reading still looks fine.
Thyroid: the thermostat for your metabolism
Your thyroid sets the pace of your metabolism, and when it slows down (hypothyroidism), fatigue, cold intolerance, and low mood are classic features. The screening test is TSH (thyroid-stimulating hormone), sometimes paired with free T4 [4]. Hypothyroidism is more common in women and its likelihood rises with age, which is one reason a thyroid check is standard when fatigue is the complaint [4].
Postpartum thyroid changes deserve their own mention. Thyroid dysfunction can appear in the months after delivery and can be mistaken for "just new-parent exhaustion," which is exactly the dismissal so many people describe [4]. A number on a lab report is harder to wave away than a symptom.
Vitamin B12: the fog you can sometimes measure
B12 (cobalamin) is required for healthy red blood cells and nerve function, and deficiency can cause fatigue, weakness, and cognitive fog [5]. Risk climbs with age because stomach acid needed to absorb B12 declines, and it climbs with certain medications and dietary patterns [5]. If you are the person managing someone else's pill organizer, note that some commonly prescribed medications can lower B12 over time, which is worth a conversation with a provider who can see the full picture [5].
For anyone whose job depends on sharp thinking, the cognitive symptoms are the frustrating part, and they are one reason a provider may check B12 rather than assume brain fog is permanent.
Vitamin D: common, and easy to overlook
Vitamin D insufficiency is widespread, and low levels have been associated with fatigue and muscle weakness [6]. It is measured with a 25-hydroxyvitamin D blood test [6]. Vitamin D alone is rarely the whole story, but because deficiency is common and simple to identify, it frequently earns a place on a fatigue workup.
nmol/L · marker = Adequacy threshold
Source: [6] Vitamin D Fact Sheet for Health Professionals (NIH Office of Dietary Supplements)
Why a coordinated look comes first
Here is the thread connecting all four markers: they overlap. Low iron, an underactive thyroid, low B12, and low vitamin D can each cause fatigue, and more than one can be present at once. Testing one in isolation can miss the others. That is the argument for a single coordinated panel reviewed together by an independent, licensed provider rather than a guess made alone at midnight on your phone.
It is also the honest case for pumping the brakes on NAD+ as a first move. NAD+ biology is genuinely interesting and actively researched [1]. But if the actual driver is a low ferritin or an underactive thyroid, a supplement is not addressing the cause, and you have spent money and hope on the wrong target. A review of the fundamentals first is not the boring option. It is the efficient one, which matters when you have zero margin in your week.
A note on compounded products, since they come up in longevity marketing: compounded medications are not reviewed or approved by the FDA for safety, effectiveness, or quality. Compounded products are not equivalent to or interchangeable with any FDA-approved brand-name drug. Availability varies by state. A prescription is never guaranteed and is decided by an independent licensed provider.
What to actually ask for
If you take one thing from this, make it a short list to bring to a provider or a coordinated telehealth review:
- Ferritin plus a complete blood count (iron stores and anemia) [2][3]
- TSH, with free T4 if indicated (thyroid function) [4]
- Vitamin B12 (and folate if suggested by your history) [5]
- 25-hydroxyvitamin D (vitamin D status) [6]
None of these are exotic or expensive. All of them can be drawn from a single blood sample. And every one of them can turn "I'm just tired all the time" into something specific enough to act on.
You are not too ordinary for this, and you are not too far gone. Being tired for everyone else does not disqualify you from getting your own baseline looked at. It is arguably the strongest reason to.
Source: [2] Iron-Deficiency Anemia (NHLBI, NIH), [4] Hypothyroidism (Underactive Thyroid) (NIDDK, NIH), [5] Vitamin B12 Fact Sheet for Health Professionals (NIH Office of Dietary Supplements), [6] Vitamin D Fact Sheet for Health Professionals (NIH Office of Dietary Supplements)
Where Velri fits
Velri is a technology and coordination company, not a medical provider. Velri does not practice medicine. What Velri can do is coordinate the logistics that usually stand between you and answers: help arrange lab work, connect you with an independent, physician-led Provider Group for a visit that reviews your results and your history, and, if a provider decides a prescription is appropriate, coordinate with an independent, licensed pharmacy. Care is provided by independent Provider Groups; medications are dispensed by independent, licensed pharmacies. Coverage currently starts in Nevada, with more states rolling out.
Whether or not any treatment follows is a decision made by an independent licensed provider, never a promise. The goal of the Velri clinical review process is simple: get a real look under the hood, on a schedule that respects the fact that you are already carrying more than enough.
*This article is educational and is not medical advice. Talk with a licensed provider about your individual situation.*
