Stress-Relax Suntheanine L-Theanine 100 mg Review

Natural Factors Stress-Relax Suntheanine L-Theanine 100 mg received a product quality score of 95/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 5 active ingredients with 60 servings per container. All 8 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Natural Factors, holds a brand trust score of 100/100.

Natural Factors Stress-Relax Suntheanine L-Theanine 100 mg contains 5 active ingredients: Calories (15), Total Carbohydrate (4 g), Total Sugars (3 g), Includes 3 g Added Sugars, Suntheanine®L-Theanine (200 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

GoodSupp reviewed the inactive-ingredient data available for Natural Factors Stress-Relax Suntheanine L-Theanine 100 mg. All 8 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Natural Factors receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1950 and headquartered in Coquitlam, British Columbia, Canada, the company offers 832 products in their lineup. Note: Natural Factors has 5 historical regulatory incidents on record, which are factored into the trust score.