L-Proline
Scored by the Formulate Research Team · Last reviewed July 2026
Score Breakdown
Three factors carry this score; three more are checked separately and can only take points away. Hover or tap to see what drove each one.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| L-Proline | 1 g |
Certifications & Testing
Other Ingredients
Cellulose, Stearic Acid, Silica
Recommended Use
Suggested Usage: Take 2 capsules 1 to 2 times daily, preferably on an empty stomach.
Warnings
Caution: For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. Keep out of reach of children. Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens. Do Not Eat Freshness Packet. Keep in Bottle.
Frequently Asked Questions
What is NOW Foods L-Proline's Formulate score?
NOW Foods L-Proline scores 84 out of 100 (grade A-) on Formulate's ingredient-level rubric: clinical evidence, dose accuracy and bioavailability carry the score, while manufacturing, transparency and safety are checked separately and can only deduct.
Is NOW Foods L-Proline worth it?
NOW Foods L-Proline scores 84/100 (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 NOW Foods L-Proline?
Each serving contains L-Proline (1 g). Serving size: 2 Veg Capsule(s). 60 servings per container.
How do I take l-proline?
Suggested Usage: Take 2 capsules 1 to 2 times daily, preferably on an empty stomach.
Who makes L-Proline?
L-Proline is made by NOW Foods. See Formulate's full grade and product lineup for NOW Foods on its brand page.
Is NOW Foods L-Proline third-party tested?
NOW Foods lists the following certifications and testing for this product: Vegan, Vegetarian, Gluten-Free, Dairy-Free.
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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.