4.8 Avg Rating | 65,000+ Lives made healthier
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Professional-grade nutrition,
designed by Parsley clinicians.
SHOP BY HEALTH GOAL
Find what your body needs
why we’re different
Not all supplements are created equal
At Parsley, "professional grade" means every supplement is third-party tested for quality and purity, and manufactured in NSF/USP-certified, cGMP-compliant U.S. facilities that meet FDA standards.
Our clinicians know which supplements actually move the needle — and which don't. Every formula is selected for clinical evidence, optimal bioavailability, and meaningful dosing. Not what's cheapest to manufacture. What actually works.
| Parsley Supplements | Standard Supplements | |
|---|---|---|
| Physician-Formulated | ||
| Third-Party Tested | ||
| Clinically Dosed | ||
| USA-Made | ||
| Most Bioavailable Forms |
"Many of us don’t get the nutrient density we need from our food, even if we eat healthy diets. That includes me, which is why there are certain supplements I take every day."
Dr. Robin Berzin, MD
Founder and Clinician
the parsley difference
Not your ordinary supplements
Our professional grade supplements are uniquely designed by Parsley clinicians who are rigorously trained in functional medicine. They are experts in using supplements as a tool to treat root cause issues.
Board-certified clinicians
All Parsley clinicians are MDs, DOs, NPs, or PAs trained at top hospitals and universities in fields like internal medicine and family medicine.
Functional medicine fellowship
Each clinician completes Parsley’s intensive, evidence-based fellowship, plus advanced coursework through the Institute for Functional Medicine.
Conventional + functional care
We combine whole-body functional medicine with the ability to prescribe conventional medications when appropriate, no tradeoffs required.
QUALITY STANDARDS
Three reasons our formulas actually work
Bioavailable ingredients
Absorption is everything. We select ingredient forms based on clinical evidence, not cost. That's the difference between a supplement that works and one that doesn't.
Third-party tested
We don't ask you to take our word for it. Every formula is independently tested for purity, potency, and label accuracy by a third-party lab so you know exactly what you're getting.
Made in USA
Manufactured in the USA at NSF- or USP-certified, cGMP-compliant facilities. These are the same standards required for pharmaceutical production.
Designed to support your health—
the way I’d recommend to my own patients.
MEMBER REVIEWS
Hundreds of 5-star reviews
4.8 average rating450+ reviews
Mega Omega 3 Fish Oil
"Based on what I see for sale online, this has some of the highest quantity mgs of ingredients for the best possible price. Since my doc recommends this brand, I'm doubly sold."
Andrea A.Verified Customer
Vitamin D3 + K2 Drops
"This product is amazing. My doctor keeps asking me again and again to remind her how my D level is so perfect . Put my husband on it too with the same results. Thank you Parsley!"
Fredda G.Verified Customer
Rebuild Clean Protein Powder
"My body started to crave this product. With battling malnourishment and malabsorption, this is a super helpful product to buy! Glad my doctor recommended it."
Mary K.W.Verified Customer
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