Brand investigation Published Sep 28, 2025

Kirkman (Kirkman®/Kirkman Laboratories)

Kirkman: Testing powerhouse with a checkered past—and a noticeable transparency upgrade

Overall grade

61 /100 Mixed

Kirkman publicly posts lot-specific Certificates of Analysis (COAs) for its new P2i prenatal—rare in the supplement world—backed by an 'Ultra Tested' protocol that uses ISO 17025 labs and parts-per-billion methods. Yet the brand also carries a regulatory paper trail: a 2016 FDA warning letter (fluoride drugs) and recalls tied to contaminated inputs, including antimony-tainted stevia in 2009.

Transparency

68 /100

Mixed

Scandal-Free

50 /100

Poor

Innovation

55 /100

Poor

Satisfaction

62 /100

Mixed

Value

70 /100

Adequate

The investigation

We mapped Kirkman's supplement-specific quality claims against hard evidence: site-posted testing protocols, COAs, GMP statements, FDA records (warning letters, recalls), ownership filings, independent coverage, and user patterns (Glassdoor/Indeed/Reddit). We then priced flagship items against market norms and weighed value, innovation, and transparency to build a plain-English verdict for supplement buyers.

Key findings

What our investigation surfaced

01

Kirkman's 'Ultra Tested' program is unusually detailed for supplements: identity testing plus microbials, pesticides, and extensive heavy metal panels at ppb levels through ISO-17025 labs. Translation: they test more, and more sensitively, than the minimum rules require. ¹²
02

A real transparency step: Kirkman publicly posts batch-specific COAs on its P2i prenatal product page (multiple lot links visible). Most brands don't publish lot COAs. ⁴
03

Documented issues exist: a 2016 FDA warning letter (fluoride 'supplements' marketed as unapproved drugs) and two separate recall eras—2009 (antimony from stevia) and 2013 (chloramphenicol risk in a supplier raw material). These don't implicate current lots but establish historical risk patterns. ⁹¹¹¹⁰
04

Ownership has shifted (Hemptown acquisition; later brand transfer to Functional Brands). Such changes can affect priorities and resourcing, so watch continuity of quality practices. ⁵⁶⁷
05

Pricing/value looks mixed-to-good: example—Magnesium Bisglycinate 180-count at $22.50 and 250-count at $45.50 are competitive for an 'unbuffered/bisglycinate' position; premium items like chewable CoQ10 land on the higher side. ¹⁸

Company profile

Who they actually are

Ownership

Kirkman's operating assets were acquired by Hemptown Organics (2019). SEC filings indicate the Kirkman brand was transferred to Functional Brands Inc. in May 2023 within a structure originally tied to Hemptown; Functional Brands disclosed its Kirkman brand interest in subsequent S-1/A filings. ⁵⁶⁷

Founded

Founded in 1949 in Seattle; moved to Oregon in 1967. ¹⁶

Headquarters

Lake Oswego, Oregon; owns/operates a nutraceutical facility described as FDA-registered and cGMP-certified (25,000 sq ft). ⁵⁶

Market position

Historically focused on hypoallergenic formulas and support for sensitive populations (e.g., autism community), now promoting heightened purity claims and a new prenatal line with public COAs. ¹⁴¹⁶

Regulatory record

Notable items: (1) FDA warning letter (Jan 13, 2016) to Kirkman Laboratories regarding unapproved prescription fluoride drug products; (2) 2013 Class II recalls tied to chloramphenicol contamination risk in a supplier raw material; (3) 2009 voluntary recalls after antimony contamination traced to stevia lots used in flavored products. ⁹¹⁰¹¹

Certifications

Company states it is cGMP certified; facility FDA-registered. ³⁵
Ultra Tested protocol executed via independent ISO 17025–certified labs. ²

Active controversies

Past contaminant-related recalls and an FDA warning letter (fluoride drugs) contrast with present-day testing claims and a public COA pilot, creating a brand narrative of improvement rather than a spotless record. ⁹¹⁰¹¹

P2i Prenatal Multivitamin & Multimineral

Prenatal · $34.95/120 ct (30-day supply) at time of review

Strength

Public lot-level COAs; claims testing for 24 heavy metals, 120 pesticides/chemicals, 9 allergens; straightforward formula with choline and methylfolate.

Weakness

COAs currently published for this line only; we did not find public COAs for the broader catalog.

Evidence

Product page lists and links COAs for specific lots; Kirkman testing pages describe ISO-17025 lab use and protocol scope. ⁴²

Transparency standout for pregnancy use—rare COA access earns trust. Confirm your lot's COA and discuss iron/choline needs with your clinician.

Super Nu-Thera (hypoallergenic, no A & D)

Multivitamin/mineral (high-B6) · $67.00/300 caps

Strength

Longstanding niche multivitamin for sensitive users; hypoallergenic excipient profile.

Weakness

No public lot COAs; relies on brand testing assurances.

Evidence

Product page with specifications and historical context; company testing pages. ¹²¹²

Solid legacy option for those needing minimal additives; would benefit from posted COAs like the prenatal.

Magnesium Bisglycinate (caps/powder)

Mineral · $22.50/180 caps (100 mg Mg each); $45.50/250 caps; $24.50/4 oz powder

Strength

Gentle glycinate form; competitive pricing versus many practitioner brands; hypoallergenic positioning.

Weakness

Community reports of capsule fill variability exist (occasional manufacturing variance).

Evidence

Kirkman product pages (price/strength); Reddit thread noting variability experience. ¹⁸¹⁴ ]

Good value per mg for a clean bisglycinate; if you notice inconsistent fills, contact support for replacement.

Approach with caution

Products with issues

Historical flavored liquids/powders (2009)—multi SKUs

Legacy recall context · N/A (historic)

Issue

2009 voluntary recall tied to antimony contamination traced to stevia lots; a serious quality lapse for a sensitive-user brand.

Past event; not indicative of current lots but part of the brand's true history.

Biofilm Defense & certain enzyme SKUs (2013)

Recall context · N/A (historic)

Issue

Chloramphenicol-related supplier risk triggered Class II recalls in multiple lots.

Another supplier-origin risk that reinforces why today's lot-level COAs matter.

Men's Multivitamin & Mineral (contains DHEA)

General multivitamin · Varies on site

Issue

Includes DHEA—an adrenal hormone not appropriate for many users unless medically indicated; potential regulatory/sport testing implications.

Not a routine 'one-size-fits-all' multi—consult your clinician, especially if drug-tested or with hormone-sensitive conditions.

Red flags

Concerning patterns we found

Regulatory trail (unapproved fluoride drugs; recalls)

FDA company list shows a Jan 13, 2016 warning letter; recall databases show 2013 Class II events; reporting documented 2009 stevia/antimony recall. ⁹¹⁰¹¹

FrequencyMultiple discrete events over 2009–2016 (closed/terminated).

ResponseCompany later emphasized expanded contaminant testing ('Ultra Tested'), ISO-17025 labs, and tighter QA/QC. [^1][^2][^3]

What customers say

Patterns across the reviews

Transparency praise around testing, with isolated quality-control complaints

Light but consistent mentions across forums/reviews

They test for hazardous substances very rigorously. Is this a brand you can trust? [Reddit user] ¹³

"It is a good environment, but can be stressful because of workload and lack of personnel." [Indeed review] ⁸

Shoppers value rigorous testing but still want predictable capsule fills and broad COA access.

Workplace reviews are mixed (culture/management variability)

Small sample size, divergent views

Toxic environment... nepotism. [Glassdoor review] ⁸

"Quality counts... collaborative, quality-focused." [Indeed review] ⁸

Culture shifts during ownership transitions can affect consistency; continue to watch execution quality.

Value analysis

What you actually pay for

Pricing strategy

Value-to-mid premium. Staples like magnesium bisglycinate price well against practitioner lines; specialized items (e.g., chewable CoQ10) skew premium. ¹⁸¹²

Ingredient cost

Glycinate minerals (Albion-style chelates) and hypoallergenic excipients typically cost more than commodity blends; testing overhead raises COGS.

Markup

Where public COAs are provided (P2i), the transparency premium feels justified; where COAs aren't posted, shoppers are comparing against NOW/Doctor's Best/KAL price anchors highlighted by community threads. ¹⁵

Above-average value when you specifically need hypoallergenic formats plus tighter contaminant testing; otherwise, mainstream value brands may be cheaper for basic nutrients.

Alternatives

Other brands worth considering

NOW Foods

Aggressive in-house and third-party testing; ISO-accredited labs; strong value pricing.

Price

Often lower cost per mg than practitioner brands.

Choose when

Budget-sensitive shoppers who still want heavy testing and broad retail access. ¹⁵

Pure Encapsulations

NSF-GMP registered manufacturing; extensive contaminant testing; hypoallergenic positioning similar to Kirkman.

Price

Typically higher than mass-market brands.

Choose when

Clinician-guided protocols where NSF-GMP registration and consistent formulations are priorities. ¹⁹²⁰

Verdict matrix

Who should buy, who should skip

Ideal for

Parents and clinicians who need hypoallergenic formulas with extra contaminant testing
Prenatal buyers who want to see their lot's COA
Users sensitive to excipients (colors/flavors/preservatives)

Avoid if

You want every product's COA publicly posted (only some lots/products show COAs today)
You prefer rock-bottom pricing for basics (magnesium, single-vitamins)
You must avoid hormone-related actives (e.g., DHEA in some multis)

Best products

P2i Prenatal Multivitamin & Multimineral (public COAs)
Magnesium Bisglycinate (value for a clean glycinate)
Super Nu-Thera (hypoallergenic legacy multi)

Skip these

General multis with DHEA unless medically indicated
Legacy flavored liquids/powders from 2009 recall era (historical note)

The bottom line

Comprehensive analysis shows a genuinely mixed picture. On one hand, Kirkman's Ultra Tested protocol, use of ISO-17025 labs, and the decision to post lot-specific COAs on P2i set a higher-than-average bar for supplement purity and transparency. On the other, the brand's file includes a 2016 FDA warning letter (fluoride drugs) and two recall clusters tied to supplier contamination (2009 antimony via stevia; 2013 chloramphenicol raw-material risk). Taken together, Kirkman looks like a specialized manufacturer that learned from past lapses and has invested in more rigorous testing—especially for sensitive populations—but still hasn't extended public COAs across the catalog. For consumers, that translates to: strong pick when you need hypoallergenic formulations and want more contaminant testing than usual—just verify the COA where available and keep an eye on formulations (e.g., DHEA in certain multis). ¹²³⁴⁹¹⁰¹¹

What to watch for

FDA has initiated steps to remove ingestible fluoride drug products for children from the market (targeting late-2025 actions). While this doesn't affect supplements like vitamins/minerals, it underscores the agency's renewed posture on unapproved drug products—a relevant backdrop given Kirkman's 2016 letter. ²¹

Frequently asked

Common questions

Does Kirkman publish COAs for all products?

Not today. We found public lot COAs for the P2i prenatal line; other items rely on internal testing claims without posted lot PDFs. Always ask support for your lot's COA. ⁴

Is Kirkman cGMP certified?

The company states it is cGMP-certified and FDA-registered; certifying body isn't named on site pages we reviewed. ³⁵

How does 'ISO 17025' help me as a consumer?

It means the third-party labs performing Kirkman's tests are accredited to a standard courts accept—think 'crime-lab-level methods' for supplements. ²

Should the 2009/2013 recalls worry me today?

They're history, but they prove why COAs and rigorous supplier testing matter. Use brands that show their work—Kirkman is starting to with P2i. ¹⁰¹¹

What's with DHEA in a multivitamin?

DHEA is a hormone; some multis include it for niche goals, but it's not broadly appropriate. Check with your clinician—especially if drug-tested in sport. ¹⁷

How we investigated

Document review of FDA databases (warning letters/recalls), SEC filings, company quality pages and product COAs, third-party recognition, business directories, employee and consumer sentiment (Glassdoor/Indeed/Reddit), and price checks on Kirkman product pages. Focus remained strictly on supplement manufacturing, testing, transparency, value, and consumer relevance.

Sources

1. Kirkman Ultra Tested program page (2025)
2. State-of-the-Art Testing (ISO-17025 labs, methods) (2025)
3. Quality Control & Assurance (cGMP statement) (2025)
4. P2i Prenatal product page with COA downloads (lot links) (2025)
5. Hemptown USA announces acquisition of the Kirkman Group (2019) (2019)
6. Functional Brands S-1/A excerpt noting Kirkman brand transfer (2023–2025 filings) (2025)
7. Hemptown: Kirkman named Top Supplement Manufacturing Company 2023 (Newsfile) (2023)
8. Employee reviews—Indeed & Glassdoor snapshots (2024)
9. FDA—Actions to Remove Unapproved Drugs by Company: Kirkman Laboratories (warning letter Jan 13, 2016) (2024)
10. FDA Recall Tracker (2013 Class II recalls—chloramphenicol risk) (2014)
11. Spokesman-Review reporting on 2009 Kirkman antimony/stevia recall and subsequent expanded testing claims (2012)
12. Super Nu-Thera product page (price/spec) (2025)
13. Reddit—user asking about Kirkman testing reputation (2024)
14. Reddit—capsule fill variability observation on Kirkman magnesium (2024)
15. NOW Foods—Comprehensive Testing (ISO-accredited labs, 31,000+ tests/month) (2025)
16. Kirkman History (founded 1949; Oregon move; Rimland collaboration) (2025)
17. Kirkman Men's Multivitamin & Mineral (includes DHEA) (2025)
18. Kirkman Magnesium Bisglycinate (caps/powder) pricing (2025)
19. Pure Encapsulations—Quality at Our Core (NSF-GMP registration) (2025)
20. Pure Encapsulations—Quality Assurance page (testing scope; NSF-GMP) (2025)
21. HHS/FDA—Initiating action to remove ingestible fluoride drug products for children (May 13, 2025) (2025)

Investigation date 2025-09-28 · 21 sources