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How to Read a Supplement Study: RCT, Placebo and NNT in Plain Words

Quick answer

How to read a supplement study: find the type, the people, the dose, the comparison and the result size. An RCT with a placebo group is the strongest single design. A study of an ingredient is not a study of a finished product such as SciatiEase.

Written by the SciatiEase label deskUpdated · 4 min read

An illustration of the sciatic nerve drawn as a transit line
An illustration made for this site.

How to read a supplement study: what do RCT, placebo and NNT mean?

How to read a supplement study starts with the RCT, a randomized controlled trial: people are assigned by chance to the supplement or a placebo. A placebo holds no active ingredient.

NNT is the number needed to treat for one extra person to improve.

Reading the terms
TermPlain meaning
RCTChance decides who gets what
PlaceboLook-alike with nothing active
NNTLower is better; 1 is perfect

What does a real supplement trial look like?

A good example is the PEA sciatica trial: 636 adults took 300 or 600 mg a day for 3 weeks. Pain fell from 7.1 to 2.1 on 600 mg, against 6.6 to 4.6 on placebo (Keppel Hesselink, J Pain Res 2015).

A reanalysis put the NNT at 1.7 (Cruccu et al., PEA sciatica 2019). The trial used micronized PEA, and the SciatiEase label does not say which form it uses.

  • PEA

    167% of the low end at 4 capsules
    2 capsules (sales-page morning dose)250 mg
    4 capsules (label serving)500 mg
    300-600 mg a day in a sciatica trial300-600 mg

    Printed on the panel: 500 mg per 4 capsules. (Keppel Hesselink, J Pain Res 2015)

  • R-alpha lipoic acid

    42% of the low end at 4 capsules
    2 capsules (sales-page morning dose)125 mg
    4 capsules (label serving)250 mg
    600-1,800 mg a day in neuropathy trials600-1,800 mg

    Printed on the panel: 250 mg per 4 capsules. (Cochrane, Alpha-lipoic acid 2024)

  • Acetyl-L-carnitine

    17% of the low end at 4 capsules
    2 capsules (sales-page morning dose)125 mg
    4 capsules (label serving)250 mg
    1,500-3,000 mg a day in neuropathy trials1,500-3,000 mg

    Printed on the panel: 250 mg per 4 capsules. (Cochrane, Acetyl-L-carnitine 2019)

  • Benfotiamine

    67% of the low end at 4 capsules
    2 capsules (sales-page morning dose)100 mg
    4 capsules (label serving)200 mg
    300-600 mg a day in neuropathy trials300-600 mg

    Printed on the panel: 200 mg per 4 capsules. (BENDIP trial, benfotiamine 2008)

Coral bars: what 2 or 4 capsules hold, from the Supplement Facts panel. Green bars: daily amounts of that ingredient alone in studies; the light extension shows a range. Studies tested single ingredients, mostly in diabetic neuropathy or back pain, not SciatiEase.

What can a study not tell you?

A study cannot tell you about a product it did not test. No trial of SciatiEase exists.

Alpha-lipoic acid probably has little effect on symptoms at 6 months (Cochrane, Alpha-lipoic acid 2024).

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What should you check in every study?

Check the dose, the length and who paid.

Fair summary

PEA at 500 mg is in the studied range; most other doses are below it.

Keep taking prescribed medicine. See the benefits page.

What are the order options?

Packs are 3 bottles for $177 or 6 for $294, with a 180-day guarantee.

3 bottles$177$59 a bottle · free US shippingBest value6 bottles$294$49 a bottle · free US shipping

FAQ01

Questions about reading studies

What makes a supplement study reliable?

Look for random assignment, a placebo group, a clear dose, enough people and a published plan. One small study is a hint, not an answer.

Does a significant result mean a supplement works well?

No. Significant means the gap was unlikely to be chance, not that it was large. Check the size of the change, not just the label.

What is a Cochrane review in plain words?

It is a systematic summary of all good trials on one question, using fixed rules. It often finds weaker evidence than single studies.

Who wrote this02

Written and reviewed by

Written byThe SciatiEase label deskGosciatiease, SciatiEase authorized U.S. retailer

Pages built from the label, the official site, the sales page and linked NIH, FDA, FTC and peer-reviewed sources.

Medically reviewed byDr. Julia Buchfuhrer, MD, PhysicianRole: Medical reviewerReview date: October 19, 2026

Last updated . Read our editorial standards and how we check reviews. This website is run by a SciatiEase authorized U.S. retailer, not by the manufacturer. We are paid a commission when you buy through our order links.

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