Stress B-Complex
Scored by the Formulate Research Team · Last reviewed July 2026
Overview: Thorne Stress B-Complex
Manage stress naturally with a complete complex of B vitamins, plus extra B5 for adrenal support* Stress B-Complex contains an optimal balance of essential B vitamins, with extra vitamin B5 to support healthy adrenal and immune function.*
Score Breakdown
Formulate scores every product across six weighted dimensions. Each dimension is graded independently — hover or tap to see what drove each component.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| Folate200 mcg as L-5-Methyltetrahydrofolate from L-5-Methyltetrahydrofolic Acid, Glucosamine Salt249 systematic reviews · 697 randomised trials | 1002 mcg |
| Riboflavin25 mg as Riboflavin and 3.6 mg as Riboflavin 5'-Phosphate Sodium9 systematic reviews · 14 randomised trials | 85.8 mg |
| Vitamin B625 mg as Pyridoxine HCl and 3.4 mg as Pyridoxal 5'-Phosphate62 systematic reviews · 142 randomised trials | 85.2 mg |
| CholineCholine Citrate25 systematic reviews · 186 randomised trials | 42 mg |
| ThiaminThiamin HCl20 systematic reviews · 43 randomised trials | 150 mg |
| Vitamin B12Methylcobalamin141 systematic reviews · 337 randomised trials | 300 mcg |
| NiacinNiacinamide22 systematic reviews · 99 randomised trials | 240 mg |
| Pantothenic AcidCalcium Pantothenate3 systematic reviews · 27 randomised trials | 750 mg |
| Biotin10 systematic reviews · 32 randomised trials | 240 mcg |
Certifications & Testing
Other Ingredients
Calcium Laurate, Hypromellose (derived from cellulose) capsule, Microcrystalline Cellulose, Silicon Dioxide
Recommended Use
Take 1 capsule one to three times daily or as recommended by your health-care practitioner.
Warnings
ALLERGY WARNING: This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients. PREGNANCY: If pregnant, consult your health-care practitioner before using this product. INTERACTIONS: 5-methyltetrahydrofolate (5-MTHF) supplementation is not recommended concurrent with methotrexate cancer therapy, as it can interfere with methotrexate's anti-neoplastic
Frequently Asked Questions
What is Thorne Stress B-Complex's Formulate score?
Thorne Stress B-Complex scores 85 out of 100 (grade A-) on Formulate's ingredient-level rubric, which weighs evidence quality, dose accuracy, bioavailability, transparency, safety, and manufacturing practices.
Is Thorne Stress B-Complex worth it?
Thorne Stress B-Complex scores 85/100 (grade A-). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Thorne Stress B-Complex?
Each serving contains Folate (1002 mcg), Riboflavin (85.8 mg), Vitamin B6 (85.2 mg), Choline (42 mg), and more. Serving size: 1 Capsule. 60 servings per container.
How do I take stress b-complex?
Take 1 capsule one to three times daily or as recommended by your health-care practitioner.
Who makes Stress B-Complex?
Stress B-Complex is made by Thorne. See Formulate's full grade and product lineup for Thorne on its brand page.
Is Thorne Stress B-Complex third-party tested?
Thorne lists the following certifications and testing for this product: Third-Party Tested.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.