Drugs

Calroy Health Sciences, LLC

FDA issued a warning letter to Calroy Health Sciences, LLC (Scottsdale, AZ, United States) on Nov 14, 2022, citing 21 CFR 201.5. Subject: New Drug, Misbranded.

From the letter: “Your Arterosil product is not generally recognized as safe and effective for the above referenced uses and, therefore, Arterosil is a “new drug” under section 201(p) of the Act [21 U.S.C. 321(p)].”

Scottsdale, AZ, United StatesIssued Nov 14, 2022Posted Nov 17, 2022Close-out Jul 21, 2023

FDA published a close-out letter on Jul 21, 2023. The findings below are from the original warning letter.

At a glance

What a reviewer notes before reading: findings, citations, the response deadline and what the letter warns of.

Violations
2 findings · 2 issue types
Response due
15 working days after receipt of this letter
FDA asks for
4 actions
Named as possible actions
Seizure, injunction
Issued by
Center for Food Safety and Applied Nutrition
Published status
Close-out Jul 21, 2023

AI assisted findings

Model-assisted reading of each issue. Open one to see the FDA text it comes from, and check it against the full letter.

01Registration, listing & premarketThe product is an unapproved new drug because it is intended to treat diseases without FDA approval.
Your Arterosil product is not generally recognized as safe and effective for the above referenced uses and, therefore, Arterosil is a “new drug” under section 201(p) of the Act [21 U.S.C. 321(p)].
02Labeling, claims & marketing · 21 CFR 201.5The product is misbranded because it lacks adequate directions for lay use for its intended disease treatments.
Accordingly, Arterosil fails to bear adequate directions for its intended use and, therefore, Arterosil is misbranded under section 502(f)(1) of the Act [21 U.S.C. 352(f)(1)].

What FDA requested

  • Notify FDA in writing of specific steps taken to address the violations.
  • Explain each step to prevent recurrence and provide related documentation.
  • If unable to complete corrections in 15 days, state reason and timeline.
  • If product believed compliant, provide reasoning and supporting information.

FDA Warning Letter

24 paragraphs · 2 sections

Text as published on FDA.gov, retrieved Oct 18, 2026. Layout added for reading; the wording is FDA’s. View on FDA.gov (opens in a new tab)

DatedNovember 14, 2022
Sent toRE: 636311
AddressedDear Mr. Chen and Mr. Hoyt

1Introduction

6 paragraphs

This letter is to advise you that the U.S. Food and Drug Administration (FDA) reviewed your website at www.arterosil.com in October 2022 and has determined that you take orders there for your Arterosil product. The claims on your website establish that Arterosil is a drug under section 201(g)(1)(B) of the Federal Food, Drug, and Cosmetic Act (the Act) [21 U.S.C. 321(g)(1)(B)] because it is intended for use in the cure, mitigation, treatment, or prevention of disease. As explained further below, introducing or delivering this product for introduction into interstate commerce for such uses violates the Act. You can find the Act and FDA regulations through links on FDA’s home page at www.fda.gov.

Examples of some of the website claims that provide evidence that Arterosil is intended for use as a drug include the following:

On your Arterosil product page at www.arterosil.com:

"Arterosil® - the only glycocalyx regenerating product patented to stabilize and regress vulnerable plaque…"

“The primary contributors to breakdown of the endothelial glycocalyx are high blood glucose, oxidative stress and inflammation. Pathologies associated with impaired endothelial glycocalyx include: Coronary heart disease, Hyperglycemia, Diabetes, Renal diseases, Lacunar stroke, Severe trauma…”

"Leukocyte Adhesion Study….Finding: Arterosil prevents the increase of leukocyte adhesion and inhibits endothelium-mediated inflammation"

2Under the “Patient Education” Tab

11 paragraphs

"What you need to remember is that LDL can only cause problems if it lodges in the artery wall. A healthy glycocalyx can slow or stop that from happening."

"MRI Carotid Plaque Regression Study….Finding: Arterosil caused a significant reduction of lipid-rich necrotic core (LRNC) of carotid atherosclerotic plaque"

"Plaque Reduction Retrospective Case Study….Finding: Arterosil caused a significant reduction of artherosclerotic [sic] plaque."

"Hypertension Study….Finding: Arterosil significantly lowered diastolic blood pressure"

"Diabetic Neuropathy Study….Finding: Arterosil improved objective and subjective measures of neuropathy."

Your Arterosil product is not generally recognized as safe and effective for the above referenced uses and, therefore, Arterosil is a “new drug” under section 201(p) of the Act [21 U.S.C. 321(p)]. With certain exceptions not applicable here, new drugs may not be legally introduced or delivered for introduction into interstate commerce without prior approval from FDA, as described in sections 301(d) and 505(a) of the Act [21 U.S.C. 331(d), 355(a)]. FDA approves a new drug on the basis of scientific data and information demonstrating that the drug is safe and effective.

A drug is misbranded under section 502(f)(1) of the Act [21 U.S.C. 352(f)(1)] if the drug fails to bear adequate directions for its intended use(s). “Adequate directions for use” means directions under which a layperson can use a drug safely and for the purposes for which it is intended (21 CFR 201.5). Prescription drugs, as defined in section 503(b)(1)(A) of the Act [21 U.S.C. 353(b)(1)(A)], can only be used safely at the direction, and under the supervision, of a licensed practitioner.

Your product Arterosil is intended for treatment of one or more diseases that are not amenable to self-diagnosis or treatment without the supervision of a licensed practitioner. Therefore, it is impossible to write adequate directions for a layperson to use your product safely for its intended purposes. Accordingly, Arterosil fails to bear adequate directions for its intended use and, therefore, Arterosil is misbranded under section 502(f)(1) of the Act [21 U.S.C. 352(f)(1)]. The introduction or delivery for introduction into interstate commerce of this misbranded drug violates section 301(a) of the Act [21 U.S.C. 331(a)].

This letter is not intended to be an all-inclusive statement of violations that may exist in connection with your product. You are responsible for investigating and determining the causes of any violations and for preventing their recurrence or the occurrence of other violations. It is your responsibility to ensure that your firm complies with all requirements of federal law, including FDA regulations. This letter notifies you of our concerns and provides you an opportunity to address them. Failure to adequately address these matters may result in legal action including, without limitation, seizure and injunction.

Within fifteen working days of receipt of this letter, please notify this office in writing of the specific steps you have taken to address these matters. Include an explanation of each step being taken to prevent the recurrence of violations, as well as copies of related documentation. If you cannot complete corrective action within fifteen working days, state the reason for the delay and the time within which you will complete the correction. If you believe that your product is not in violation of the Act, include your reasoning and any supporting information for our consideration.

Your written reply should be directed to Dr. Aaron Dotson, Compliance Officer, United States Food and Drug Administration, Center for Food Safety and Applied Nutrition, 5001 Campus Drive, Office of Compliance (HFS-608), Division of Enforcement, College Park, Maryland 20740-3835 or via email at CFSANResponse@fda.hhs.gov. If you have any questions, you may also email at CFSANResponse@fda.hhs.gov.

Sincerely, /S/

Ann M. Oxenham Director Office of Compliance Center for Food Safety and Applied Nutrition Food and Drug Administration

Citations and trends

Each 21 CFR section, ISO 13485 clause and issue type in this letter, how often it appears across all letters, and its trend by the year FDA issued the letters. 2026 runs to Nov 3, 2026, compared with the same dates last year. Select a row or a bar to see those letters in Letters. As cited in this historical letter, not a statement of current requirements.

Regulations

Issue types

Record details

Issuing center
Center for Food Safety and Applied Nutrition
Issuing office
Center for Food Safety and Applied Nutrition
Location
Scottsdale, AZ, United States
Letter posted date
Nov 17, 2022
Letter issue date
Nov 14, 2022
Addressed to
Not recorded
Inspection dates
Not recorded
Response window
15 working days after receipt of this letter
Read the source clause
Within fifteen working days of receipt of this letter, please notify this office in writing of the specific steps you have taken to address these matters.
Record length
835 words · 2 recorded redactions
Published status
Close-out published Jul 21, 2023
Original letter
View on FDA.gov (opens in a new tab)
Dataset last checked
Nov 11, 2026 · How this is built

A response window is not a calculated due date. Source excerpts are selected passages. Finding interpretations and categories are model-assisted. Verify the original letter before relying on a finding.

See the pattern across 1,707 lettersFind letters like this →
Keep exploring

More drug letters

Recent records for the same product type. Your previous filters remain available when you return.

Keep exploring

Find letters like this →
For regulated teams

Put this kind of reading to
work on your own records.

Botable builds and runs a custom AI layer around the software you already use, so your team can do the job you hired them for.

Every letter by dateHow this database is built

FDA Warning Letter Alerts

Share this view

Send the same filters, search and view to a colleague.

You choose what to post or send. Sharing a link does not change access to this site.