Thorne vs Pure Encapsulations: Labels, Testing & Certifications

Quick Answer: Both brands use forms such as methylfolate and chelated minerals. On the labels we reviewed, Thorne Basic Nutrients 2/Day is a 2-capsule multi with vitamin D 50 mcg, B12 600 mcg, folate 667 mcg DFE (as Quatrefolic methylfolate), zinc 15 mg and selenium 200 mcg, and its label carries the NSF Certified for Sport mark. Pure Encapsulations O.N.E. Multivitamin is a 1-capsule multi with vitamin D 50 mcg, B12 500 mcg, folate 667 mcg DFE (as Metafolin), zinc 25 mg, plus CoQ10 50 mg, alpha-lipoic acid 50 mg, lutein and zeaxanthin. In the NSF Certified for Sport directory on October 24, 2026, we found dozens of Thorne listings and one Pure Encapsulations listing (a Canadian creatine). Pure Encapsulations emphasizes hypoallergenic formulas. Neither multi contains iron.

Thorne vs Pure Encapsulations at a Glance

Label detail	Thorne Basic Nutrients 2/Day	Pure Encapsulations O.N.E. Multivitamin
Serving	2 capsules	1 capsule (with a meal)
Vitamin D	50 mcg	50 mcg
Vitamin B12	600 mcg	500 mcg
Folate	667 mcg DFE (L-5-MTHF, Quatrefolic)	667 mcg DFE (Metafolin)
Zinc	15 mg	25 mg
Selenium	200 mcg	70 mcg
Vitamin K	400 mcg	Not listed
Iron	None	None
Extras	Lutein 140 mcg, gamma-tocopherol	CoQ10 50 mg, alpha-lipoic acid 50 mg, lutein 3 mg, zeaxanthin, lycopene
Label certification marks	NSF Certified for Sport; gluten free	Gluten free (certified)
NSF Certified for Sport listings (Oct 24, 2026)	Dozens of products	1 product (Creatine, Canada)

Label details are from the NIH Dietary Supplement Label Database (DSLD) entries listed in Sources; products are reformulated over time, so check the label on the bottle you buy. FormulaCompare does not rank brands or name a winner.

Two Brands With a Similar Pitch

Thorne and Pure Encapsulations are often grouped as “practitioner-grade” brands, meaning they are widely sold through doctors, dietitians and other clinicians as well as online. That phrase is a marketing term, not a regulatory category: FDA has no “practitioner grade” standard, and all supplements fall under the same dietary supplement rules. What you can compare are the labels and independent certifications.

Multivitamins Side by Side

We compared Thorne Basic Nutrients 2/Day and Pure Encapsulations O.N.E. Multivitamin using current NIH DSLD label entries.

Dose and serving

O.N.E. is one capsule a day taken with a meal; Basic Nutrients is two capsules. Both provide vitamin D at 50 mcg (2,000 IU), within the 100 mcg adult upper limit cited by NIH ODS, and folate at 667 mcg DFE as methylfolate.

Where the labels differ

Selenium: Thorne provides 200 mcg; Pure Encapsulations 70 mcg. The adult RDA is 55 mcg and the upper limit is 400 mcg from all sources, per NIH ODS. If you eat selenium-rich foods (such as Brazil nuts) or take other products with selenium, add it up.
Zinc: Pure Encapsulations 25 mg; Thorne 15 mg. The adult upper limit is 40 mg; long-term high zinc can lower copper. Thorne includes 750 mcg copper; the O.N.E. label we reviewed does not list copper.
Vitamin K: Thorne includes 400 mcg; O.N.E. doesn’t list vitamin K. People taking warfarin need consistent vitamin K intake and should check with their clinician before starting or switching.
B vitamins: Thorne uses larger amounts of several B vitamins (for example thiamin 50 mg, niacin 80 mg, B6 20 mg). The adult upper limit for supplemental niacin is 35 mg because of flushing; niacin in some forms (such as niacinamide) causes less flushing. B6 has an upper limit of 100 mg, and long-term high B6 can cause nerve problems; both labels are below that.
Extras: O.N.E. adds CoQ10, alpha-lipoic acid, lutein, zeaxanthin and lycopene. These are not essential nutrients; evidence for adding them to a daily multi in healthy people is limited.
Iron: neither contains iron, which suits most men and postmenopausal women but may not suit people who menstruate heavily or have low iron.

Magnesium Glycinate

Both brands sell magnesium bound to glycine. Pure Encapsulations Magnesium (Glycinate) provides 120 mg of magnesium per capsule, with directions of 1 to 4 capsules daily with food, according to its DSLD label. Thorne Magnesium Bisglycinate appears in the NSF Certified for Sport directory. Remember the 350 mg per day adult upper limit for supplemental magnesium from NIH ODS; at the top of Pure Encapsulations’ range (4 capsules, 480 mg), you would exceed it, so follow a clinician’s advice for higher doses.

Allergens and “Hypoallergenic” Claims

Pure Encapsulations’ labels reference its hypoallergenic positioning and certified gluten-free status; the O.N.E. label lists cellulose, water, plant fiber, ascorbyl palmitate and potato starch as other ingredients. Thorne’s Basic Nutrients label lists hypromellose (the capsule), dicalcium phosphate and calcium laurate, and is labeled gluten free. “Hypoallergenic” has no FDA definition for supplements, so check the full other-ingredients list against your own allergies.

Third-Party Testing: What We Checked

Dietary supplements are not approved by FDA for safety or effectiveness before they are sold; manufacturers are responsible for making sure their products are safe and labeled accurately, and FDA acts mainly after problems arise. Independent certification programs fill part of that gap:

USP Verified checks that a supplement contains the listed ingredients in the declared amounts, doesn’t contain harmful levels of specified contaminants, will break down and release into the body in a set time, and was made under good manufacturing practices.
NSF/ANSI 173 certifies that contents match the label and screens for contaminants.
NSF Certified for Sport adds screening for more than 280 substances banned in sport and is accepted by many professional leagues.
Informed Sport / Informed Choice are banned-substance testing programs run by LGC.

On October 24, 2026, we searched the NSF Certified for Sport directory. It listed dozens of Thorne products (including Basic Nutrients 2/Day, Magnesium Bisglycinate, Creatine and others) and one Pure Encapsulations product, a creatine sold in Canada. The Thorne Basic Nutrients 2/Day label in DSLD also displays the NSF Certified Sport mark. This matters most for athletes subject to drug testing. For everyone else, NSF Sport listing is one signal of quality control, not proof that a product is more effective. We could not access USP’s directory to check USP Verified status for either brand.

Who Might Prefer Which Label

Competitive athletes who are drug tested: choose products individually listed in the NSF Certified for Sport (or Informed Sport) directory. More Thorne products were listed when we checked.
One capsule a day: O.N.E. is a single capsule; Basic Nutrients is two.
Taking warfarin: note Thorne’s multi contains vitamin K; talk to your clinician either way.
Watching selenium or zinc: add up all sources; the two multis differ.
Multiple food allergies: compare the other-ingredients lists directly.

On value: compare cost per daily serving, since one is 1 capsule and the other 2. A food-first diet covers most nutrient needs; NIH ODS notes supplements can help fill specific gaps but can’t replace a healthy diet. General multivitamins are typically not HSA/FSA-eligible unless prescribed for a diagnosed condition.

Ingredient Forms

Both brands use similar “premium” forms. Per the labels, Thorne uses Quatrefolic (a glucosamine salt of L-5-methyltetrahydrofolate) and Albion TRAACS chelated minerals such as magnesium and calcium bisglycinate; Pure Encapsulations uses Metafolin (another L-methylfolate) and also lists TRAACS minerals. Chelated minerals are bound to amino acids and are often promoted as better absorbed and gentler on the stomach. NIH ODS notes that absorption differs by form for some minerals, but for most healthy people, the difference between well-made forms is small compared with taking the product consistently.

When to Talk to Your Doctor or Pharmacist

Check with a clinician or pharmacist before starting a multivitamin if you take warfarin or other prescription drugs, are pregnant or planning pregnancy, have kidney disease, or are scheduled for blood work (biotin can interfere with some lab tests). Report numbness or tingling (possible high B6 effects) or persistent GI upset.

Frequently Asked Questions

Is Thorne or Pure Encapsulations better?

FormulaCompare doesn’t name a winner. Their multis differ in serving size, selenium, zinc, vitamin K and extras like CoQ10. Thorne had far more NSF Certified for Sport listings when we checked.

Is Thorne NSF Certified for Sport?

Many Thorne products were listed in the NSF Certified for Sport directory on October 24, 2026, including Basic Nutrients 2/Day. Certification is product-specific, so check the exact product.

Is Pure Encapsulations third-party tested?

In the NSF Certified for Sport directory we found one Pure Encapsulations product (a Canadian creatine). The brand describes its own testing. We could not verify USP status.

Do these multivitamins contain iron?

Neither Thorne Basic Nutrients 2/Day nor Pure Encapsulations O.N.E. lists iron on the labels we reviewed.

What does practitioner-grade mean?

It’s a marketing term for brands sold through clinicians. FDA has no practitioner-grade standard; independent certifications are more meaningful.

Which magnesium glycinate dose is safe?

NIH ODS sets the adult upper limit for supplemental magnesium at 350 mg per day. Pure Encapsulations’ capsules provide 120 mg each; check with a clinician before taking more than the upper limit.

Sources

Medical disclaimer: This article is for educational purposes and does not replace medical advice. Consult a licensed healthcare provider before starting any supplement, medication, or treatment — particularly if you are pregnant, breastfeeding, taking other medications, or have a diagnosed medical condition.