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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, riboflavin, and vitamin B-6 are associated with the synthesis of serotonin and melatonin to support sleep regulation. Research providing a basis for these ingredients is generally moderate, though the overall evidence coverage for this specific profile is limited. The formulation maintains a high safety profile with no significant concerns noted.

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
90
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

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

Supports 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.

Uniquely Perque 100% active 100% natural 100% verified

Metadata

Product Details

DSLD Entry Date2020-12-26
Product TypeOther Combinations
FormCapsule
BrandPerque
DSLD ID241000
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.