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Sleep Guard Capsules

product on market Capsule Perque Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 57% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

L-tryptophan and B-vitamins like B-6 and riboflavin are supported by moderate evidence for their roles in serotonin synthesis and sleep regulation. Silica and croscarmellose serve as excipients rather than active therapeutic agents. Overall, the evidence coverage for this specific ingredient combination is limited.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Sleep Guard Capsules
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Vegetable Capsule(s)
Serving Size
180
Servings
Other Combinations
Product Type
57%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

3 mg (170% DV)
2.3× RDA — within safe limits 114 studies (A:3, B:35)
3 mg (130% DV)
2.3× RDA — within safe limits 13 studies (A:0, B:1)
500 mg
Market median: 500.0mg (70 products)
4 mg
Market median: 108.0mg (8 products) 9 studies (A:0, B:4)
Croscarmellose
3 mg
5 mg
Market median: 500.0mg (1 products) 316 studies (A:8, B:159)
Vegetable Capsule
120 mg

Other Ingredients

None
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: One capsule daily about 30 min before bedtime, or as recommended by a health care professional.

Warnings & Precautions

Keep out of reach of children.

Do not use product if the tamper-resistant shrink band around the cap or the inner seal beneath the cap appears to have been tampered with or is missing.

Warning: Pregnant and nursing mothers need to check with their health professional before taking supplements.

Formulation Notes

Uniquely Perque 100% active 100% natural 100% verified

Does not contain: Citrus, MSG, wheat, gluten, corn, starch, sugar, soy, yeast, zein, sulfates, phosphates (other than coenzymes), preservatives, casein or other milk derivatives. NO GMO's; NO toxic minerals or metals

Support healthy restorative sleep

Full disclosure label (no hidden or inactive ingredients)

V (Vegetarian)

Additional Information

Must be stored with cap on tightly in a cool, dry place.

Metadata

Product Details

DSLD Entry Date2021-01-22
Product TypeOther Combinations
FormCapsule
BrandPerque
DSLD ID241006
Data Updated2026-04-11
Research

Research Evidence

29
Research Sources
48
Avg Quality
19
Rct
5
Meta Analysis
3
Systematic Review
2
Clinical Trial
B Prebiotic and probiotic supplementation and the tryptophan-kynurenine pathway: A systematic review and meta analysis
Meta Analysis Neuroscience and biobehavioral reviews 2021 PubMed DOI
B Tryptophan and 5-hydroxytryptophan for depression
Systematic Review The Cochrane database of systematic reviews 2001 PubMed
B Tryptophan and 5-hydroxytryptophan for depression
Systematic Review The Cochrane database of systematic reviews 2002 PubMed
B The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression
Meta Analysis Nutrition reviews 2022 PubMed DOI
B No effects of acute tryptophan depletion on anxiety or mood in weight-recovered female patients with anorexia nervosa
Rct European archives of psychiatry and clinical neuroscience 2023 PubMed DOI
C The association between tryptophan levels and postpartum mood disorders: a systematic review and meta-analysis
Meta Analysis BMC psychiatry 2022 PubMed DOI
C A systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning
Systematic Review Journal of dietary supplements 2021 PubMed DOI
C Comparison between Acupuncture and Nutraceutical Treatment with Migratens® in Patients with Fibromyalgia Syndrome: A Prospective Randomized Clinical Trial.
Rct Nutrients PubMed DOI
C Intake of Lactiplantibacillus plantarum HEAL9 Improves Cognition in Moderately Stressed Subjects: A Randomized Controlled Study.
Rct Nutrients PubMed DOI
C Are tryptophan and 5-hydroxytryptophan effective treatments for depression? A meta-analysis
Meta Analysis The Australian and New Zealand journal of psychiatry 2002 PubMed
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.