🟢 90/100

This product looks safe

  • Contains proprietary blend — exact ingredient amounts not disclosed
  • 33% of ingredients have research evidence
A Label Compliance Grade

Product Label

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Safety Alerts

ℹ️ Contains proprietary blend — exact ingredient amounts not disclosed

Label Data

2 Capsule(s) Serving Size
30 Servings
Botanical Product Type
33% Evidence Coverage

Supplement Facts — Evidence Check

DL-Phenylalanine
30 mg (190% DV)
30 mg (196% DV)
✅ 2.1× RDA — within safe limits 📚 193 studies (Tier A: 5, B: 63)
RDA 14mg This product: 30mg UL 35mg
Proprietary Herbal Blend (Herb/Botanical)
1300 mg

Other Ingredients

certified organic Brown Rice Vegetarian Capsule

Label Claims — Verification

All Other
Structure/Function
All Other (97% of products) Structure/Function (86% of products) Nutrient (36% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Directions: Take 2 capsules, twice daily for 1-2 months. Then, 2 capsules daily as needed for maintenance.

⚠️ Warnings & Precautions

Note: Do not use if the tamper proof seal is damaged.

Products containing Kava Kava Root are not recommended for use by persons under the age of 18.

If pregnant, nursing, or taking a prescription drug, consult a health care practitioner prior to use.

Do not exceed recommended dose.

Excessive consumption may impair ability to drive or operate heavy equipment. Not recommended for consumption with alcoholic beverages.

Keep out of reach of children.

🧪 Formulation Notes

Wood Betony Leaf support craving reduction Gotu Kola promotes calm nerves Valerian encourages restful sleep St John's Wort encourages mood enhancement

Gluten free

Additional Information

For over 35 years, it has been my goal to help you feel better safely & naturally. Formulated by myself. Crystal Star products are the best choice. Linda Page, Ph.D, Traditional Naturopath

Plants rule

GMP Quality Assured This product has been manufactured at a GMP registered facility certified by the NSF (The Public Health and Safety Company)

100% satisfaction guaranteed

Store in a cool dry place (59 - 86(0) F)

Encourages the relief of symptoms like cravings, moodiness, nervous tension, head and backache.

Since 1978

Gluten free

Prod #4330 REV 6/17

Product Details

UPC / SKU 7 47889 04330 7
DSLD Entry Date 2018-05-24
Product Type Botanical
Form Capsule
Brand Crystal Star
DSLD ID 173723
Data Updated 2026-04-11

Research Evidence

241 Research Sources
55 Avg Quality Score
113 Meta Analysis
75 Systematic Review
32 Rct
11 Clinical Trial
3 Other
3 Regulatory Source
1 Cochrane Review
1 Narrative Review
1 Openfda Safety
A Niacin for primary and secondary prevention of cardiovascular events
Meta Analysis The Cochrane database of systematic reviews 2017
A Use of high potency statins and rates of admission for acute kidney injury: multicenter, retrospective observational analysis of administrative databases
Meta Analysis BMJ (Clinical research ed.) 2013
A Effect on cardiovascular risk of high density lipoprotein targeted drug treatments niacin, fibrates, and CETP inhibitors: meta-analysis of randomised controlled trials including 117,411 patients
Meta Analysis BMJ (Clinical research ed.) 2014
A A terminal metabolite of niacin promotes vascular inflammation and contributes to cardiovascular disease risk
Meta Analysis Nature medicine 2024
A Meta-analysis and imputation refines the association of 15q25 with smoking quantity
Meta Analysis Nature genetics 2010
A Genome-wide meta-analyses identify multiple loci associated with smoking behavior
Meta Analysis Nature genetics 2010
A Antidepressants for smoking cessation
Meta Analysis The Cochrane database of systematic reviews 2014
A Topical azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and fruit acid (alpha-hydroxy acid) for acne
Meta Analysis The Cochrane database of systematic reviews 2020
B Assessment of the Role of Niacin in Managing Cardiovascular Disease Outcomes: A Systematic Review and Meta-analysis
Meta Analysis JAMA network open 2019
B Association Between Lowering LDL-C and Cardiovascular Risk Reduction Among Different Therapeutic Interventions: A Systematic Review and Meta-analysis
Meta Analysis JAMA 2016
View all evidence for Niacin →

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