Ingredient 1 of 8
Glucosamine Sulfate in Nervecept: 500 mg, the Evidence and the Cautions
Glucosamine sulfate is the first and largest line on the Nervecept panel at 500 mg a capsule, 71.5% of the 699 mg printed. It is an amino sugar found in cartilage, sold for joint comfort. NCCIH says it is still uncertain whether it helps knee osteoarthritis. The label prints a shellfish warning, and MSK and Mayo list cautions for diabetes and warfarin.
Written by the Nervecept label deskUpdated
The name on the bottle01
What is glucosamine sulfate in Nervecept?
Glucosamine sulfate is an amino sugar that the body uses in cartilage. In Nervecept it is the first line on the Supplement Facts panel, at 500 mg.
The label prints it as "Glucosamine Sulfate 500mg". Supplements are typically made from shellfish shells, or produced in a lab 1. That is why the Nervecept label carries the line CONTAINS: Shellfish (Crayfish).
It is the oldest and best-known name in the formula. Most of what is known about it comes from studies in knee osteoarthritis, a joint condition. None of the sources we read tests it for numbness, tingling or nerve pain.
| Name on the label | Glucosamine Sulfate |
|---|---|
| What it is | An amino sugar found in cartilage; supplements are typically made from shellfish shells or in a lab |
| Place on the panel | 1 of 8, in label order |
| Amount per capsule | 500 mg per capsule on the Supplement Facts panel (71.5% of the 699 mg printed) |
| Amount in sources | No dose source was fetched |
| Strength of evidence | Uncertain for knee osteoarthritis (NCCIH); guidelines disagree |
| Marketed or traditional use | Sold for joint comfort |
| Main caution | The label says CONTAINS: Shellfish (Crayfish). Mayo and MSK raise shellfish allergy; MSK says it could worsen insulin resistance; MSK, Mayo and NCCIH link it to warfarin. |
The amount02
How much glucosamine sulfate is in a Nervecept capsule?
500 mg per capsule is 71.5% of the 699 mg printed, the biggest share by far. That is more than the other seven lines together.
| Measure | Figure | Where it comes from |
|---|---|---|
| Glucosamine sulfate in one capsule | 500 mg | Label panel |
| Share of the 699 mg printed | 71.5% | Our math: 500 divided by 699 |
| Seven other lines together | 199 mg | Our sum |
| Studied dose | Not fetched | No dose source was read |
We did not fetch a dose source for glucosamine, so we make no comparison with trial amounts. A big share of the capsule weight is not a measure of effect, and it is not evidence that the capsule helps.
699 mgthe eight printed amounts added up; the panel prints no total
8 lines · 500 + 67 + 50 + 50 + 8 + 8 + 8 + 8 mg- Glucosamine Sulfate500 mg · 71.5%
- Indian Frankincense67 mg · 9.6%
- Chondroitin Sulfate50 mg · 7.2%
- Turmeric50 mg · 7.2%
- Quercetin8 mg · 1.1%
- Methionine8 mg · 1.1%
- Methylsulfonylmethane8 mg · 1.1%
- Bromelain8 mg · 1.1%
Bars show each printed amount as a share of the 699 mg we added up. It illustrates the numbers on the panel; it does not measure what any line does.
The research03
What do health sources say about glucosamine sulfate?
The pattern is uncertain benefit and a fairly mild safety profile in the amounts studied. NCCIH adds that no major safety problems have been identified in large studies 2.
NCCIH
"It's still uncertain whether glucosamine and chondroitin are helpful for knee osteoarthritis symptoms." A 2019 guideline strongly recommends against both for knee osteoarthritis; a 2021 guideline lists them as possibly helpful for mild-to-moderate cases 2.
MSK
Osteoarthritis evidence is inconsistent, and the American College of Rheumatology conditionally recommends that patients avoid glucosamine for osteoarthritis 3.
Mayo Clinic
"When taken in appropriate amounts, glucosamine sulfate appears to be safe." Common side effects are nausea, heartburn, diarrhea and constipation 1.
None of these pages tested Nervecept. The capsule has never been studied as a product, so no one can say how this line behaves inside it.
In the formula04
How does the glucosamine sulfate line fit the rest of the Nervecept formula?
It is line 1 of 8 on the panel. It leads the panel with 500 mg, more than the other seven lines together, so most of what the capsule weighs is glucosamine.
Eight ingredients in one capsule means eight sets of cautions in one swallow. If any one of them is a problem for you, the capsule is a problem for you, however small that line is. That is the practical reason to read all eight pages before you order, and to show the whole panel to a pharmacist.
The label sets the amounts, and the order on the panel follows weight. The first four lines make up 95.6% of the 699 mg we print. The last four share 4.4%. That does not tell you which line matters most for any effect, because no study of the capsule exists. See how Nervecept works for the whole picture.
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See packsNerves05
Is glucosamine sulfate studied for numbness or tingling?
Not in any source we read. We make no claim that it helps nerve symptoms.
We found no page that studies glucosamine for numbness, tingling or nerve pain, so we make no claim. Numbness and tingling need a diagnosis, because diabetes, low B12, medicines and spine problems each have their own care 4. Notably, glucosamine itself carries a caution for people with diabetes, the most common cause of neuropathy.
Numbness, tingling or pain in the hands or feet deserves a medical visit 5. Keep taking prescribed medicine. Sudden weakness or numbness on one side, a drooping face or trouble speaking means call 911 6. See when to see a doctor for numbness.
Cautions06
Who should be careful with glucosamine sulfate?
Anyone on medicines, with a medical condition, pregnant or nursing, or planning surgery should ask a clinician first.
- Shellfish allergy: the label prints CONTAINS: Shellfish (Crayfish). MSK and Mayo say people with shellfish allergy should consult a provider first 3 1.
- Diabetes: MSK says glucosamine could worsen insulin resistance, and NCCIH says it may raise blood sugar in some people 3 2.
- Warfarin: MSK says glucosamine-chondroitin may potentiate warfarin and raise INR; Mayo says it might increase warfarin's effects 3 1.
- Asthma and glaucoma: Mayo says glucosamine might worsen asthma; MSK urges caution with glaucoma 1 3.
- Pregnancy and breastfeeding: NCCIH says safety is poorly understood 2.
The whole formula is covered on the side effects page and in supplements and blood thinners.
Before you order07
What is the honest summary of the glucosamine sulfate line?
The pattern is uncertain benefit and a fairly mild safety profile in the amounts studied. NCCIH adds that no major safety problems have been identified in large studies 2. This line is 500 mg of a 699 mg capsule, and no study tested the capsule.
In its favor
- Printed amount, 500 mg, with no hidden blend
- A long-known supplement name
- Mild side effects in the amounts studied 1
Against it
- Uncertain benefit even for knee osteoarthritis 2
- No source linked here tests it for nerves
- Shellfish, diabetes, asthma and warfarin cautions
Compare it with the other seven lines on the ingredients page, and see the whole panel on the supplement facts page.
FAQ08
Questions about glucosamine sulfate in Nervecept
What does glucosamine sulfate do?
It is an amino sugar used in cartilage and sold for joint comfort. NCCIH says it is still uncertain whether it helps knee osteoarthritis 2.
Is the glucosamine in Nervecept made from shellfish?
Glucosamine supplements are typically made from shellfish shells or in a lab 1. The label prints CONTAINS: Shellfish (Crayfish), so assume shellfish.
How much glucosamine is in Nervecept?
500 mg per capsule on the Supplement Facts panel, 71.5% of the 699 mg printed by our sum.
Can glucosamine help nerve pain or numbness?
We found no source that says so. Numbness and tingling need a doctor to find the cause 4.
Is glucosamine safe with diabetes?
Ask first. MSK says it could worsen insulin resistance and urges caution with diabetes 3.
Who wrote this09
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a USA Authorized Nervecept Retailer. It is not the manufacturer or the distributor named on the label. We earn money when you buy through our order links.
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