Integrative Therapeutics Supplements: A Practitioner-Grade Brand Guide

Integrative Therapeutics is one of the most respected names in the professional supplement channel, and also one of the least explained. Most pages that rank for the brand either list its products in a grid or answer a single question about testing. This guide does the opposite: who owns the company, what "practitioner-grade" actually means, how the quality program works, and which formulas are worth your attention depending on what you are trying to support.

Who Owns Integrative Therapeutics?

The short answer: Schwabe North America, a German-owned group that also owns Nature's Way. That ownership detail comes from trade and press coverage, not from Integrative Therapeutics' own company pages, which do not name a parent company on their "who we are" page.

The longer answer is more interesting, because the brand is really four brands wearing one label.

Four companies, one merger

Each founding company was started by a practicing clinician or formulator, and each kept its own identity for decades:

• Vitaline, founded in 1975 by Jed Meese, PhD
• NF Formulas, founded in 1978 by Bruce Canvasser, ND
• PhytoPharmica, founded in 1981 by Terry Lemerond
• Tyler Encapsulations, founded in 1987 by Corey Resnick, ND

In 2000, the four combined under the Integrative Therapeutics name. The practical result is a catalog with unusual depth in three areas: botanical formulation, enzyme and digestive support, and clinical-dose micronutrients.

Why this matters when you are choosing: heritage is not proof of quality. But four decades of formulation history, and a flagship that survived the merger in Vitaline CoQ10, is at least evidence that these formulas were built by people who used them in practice rather than assembled for a shelf.

Is Practitioner-Grade a Wall?

This is the question that stops most people. Search the brand name and you will see the phrase practitioner-grade on nearly every page, followed by no explanation of whether you are allowed to buy it.

Here is the plain answer: no prescription, no appointment, and no practitioner is required. Integrative Therapeutics sells through authorized web sellers and retailers. You can order it today. Agape Nutrition carries the line and sells it direct to consumers.

So what does practitioner-grade actually mean? It is a channel description more than a legal category.

• It describes who the formulas were built for. Clinical dosing, shorter ingredient lists, and formats designed to be recommended alongside a care plan.
• It describes where the brand sold first. The professional channel: practitioners' offices, dispensaries, and practitioner-facing retailers.
• It does not describe a restricted product. Nothing in the line is a controlled substance or a prescription drug.

Some manufacturers enforce a practitioner gate by hiding prices from retail sites or requiring an account. Integrative Therapeutics does not. That is why you will find it on ordinary retail shelves next to mass-market vitamins, at several times the price.

That price gap is the real decision. You are paying for the quality system below, not for access.

Inside the Quality Infrastructure

This is where the brand separates itself from a store-brand bottle, and where most competing pages stop at "third-party tested" and move on.

Third-party GMP certification

Integrative Therapeutics holds third-party GMP certification. An outside auditor, not the company itself, verifies that the facility and its processes meet good manufacturing practice standards. For the retailer-side version of this same question, see how Agape vets professional-grade quality.

An ISO 17025 accredited in-house lab

The company's on-site testing laboratory earned ISO 17025 accreditation in 2021. Integrative Therapeutics states it was one of the first internal labs in the dietary supplement industry to earn that accreditation.

ISO 17025 is the standard used to judge whether a testing lab is competent to produce valid results. It is routine in food and pharmaceutical testing and uncommon in supplements. An accredited internal lab means finished-product testing happens in a controlled, audited environment instead of being sent out on trust.

Four tests on every batch

The company's scientists run four categories of testing on both raw materials and finished goods:

1. Identity confirms the material is what the label says it is.
2. Potency confirms the amount present matches the label claim.
3. Microbiological screens for contaminants such as bacteria and mold.
4. Purity checks for heavy metals, pesticides, aflatoxins, and other unwanted material.

Vendors get vetted too

Raw materials do not arrive unexamined. Suppliers must pass a formal vendor quality evaluation covering regulatory standing, ingredient origins, and stability data before their material goes into production.

One caveat, stated plainly: Integrative Therapeutics' FAQ page describes the site as following "Drug Good Manufacturing Practices," while its quality page describes "dietary supplement GMP regulations." Those are different standards. We flag the discrepancy because you will see the drug-GMP phrasing repeated by third-party directories, and it is worth knowing it traces back to the company's own FAQ rather than to an independent verification.

The Catalog, Grouped by Clinical Goal

Most retailers sort this brand alphabetically, which is useless if you arrived with a goal. Here is the same catalog sorted by what people are usually trying to support. Products are grouped by a formula's traditional use, not by a treatment claim.

Digestive and GI support

The deepest bench in the line.

• Similase family (Similase, Similase BV, Similase GFCF, Similase Lipo, Similase Sensitive Stomach): a set of digestive enzyme formulas built for different needs.
• Physicians' Elemental Diet and Physicians' Elemental Diet Dextrose Free: the flagship formulas, built around predigested nutrition.
• Betaine HCl, Heartburn Advantage, Enterogenic Intensive 100, Motility Activator, Glutamine Forte, Zinc-Carnosine, and D-Limonene cover other digestive comfort goals.

If digestion is your focus, our digestion and gut health guide covers the wider category in more depth.

Mitochondrial and energy support

• K-PAX MitoNutrients: a high-dose micronutrient formula built around mitochondrial support.
• Vitaline CoQ10: the oldest surviving flagship in the catalog and, by the brand's own account, a category leader.
• UBQH, CoQ10 100 mg, Acetyl-L-Carnitine, Riboflavin, and Active B-Complex round out the group.

Cellular energy and cognitive support overlap heavily, so our brain and memory resources are a useful companion read here.

Stress and sleep support

• Cortisol Manager and Cortisol Manager Allergen Free: the brand's best-known stress formulas.
• Lavela WS 1265: the lavender oil softgel with the clinical file detailed below.
• HPA Adapt, Pro-Som Sleep, L-Theanine, GABA, and 5-HTP complete the group.

Curcumin and botanical absorption

• Theracurmin HP in 120-count and 60-count capsules: the flagship curcumin.
• Curcumax Pro and Resveratrol Ultra HP: broader botanical support.

Our curcumin benefits guide goes deeper on the wider research picture.

Immune and cellular defense

• Glutathione Cell Defense, V Clear EPs 7630, Pro-Flora Immune, Cellular Forte with IP-6, Vitamin C with Quercetin, and Esberitox.

Vitamin C and quercetin also appear in cardiovascular and cellular-defense formulas across the wider catalog.

Detox and liver support

• Detoxication Factors, Super Milk Thistle X, Lipotropic Complex, Calcium D-Glucarate, Activated Charcoal, and Fiber Formula.

For the wider category, see our detox and methylation pillar.

Hormone and women's and men's health

• Indolplex, Vitex Extract, Testosterone Formula, DHEA-5 and DHEA-25, and Pro-Flora Women's Probiotic.

Foundational daily formulas

• Multiplex-1 Without Iron, Clinical Nutrients HP, ProThrivers Wellness Multivitamin, the magnesium range (Magnesium Glycinate Plus, Magnesium Malate, Tri-Magnesium, Krebs Magnesium-Potassium), and Vitamin D3 chewables.

The Two Ingredients With Real Human Data

Most supplement brands cannot point to a published human trial behind a branded ingredient in their line. Integrative Therapeutics can point to two, though both are licensed branded ingredients rather than its own, and both were studied in manufacturer-funded trials.

Theracurmin HP: absorption measured, not assumed

Plain curcumin is poorly absorbed, which is why so much of the curcumin market is really a delivery-technology market. Theracurmin is a particle-size technology. In a 2021 randomized, three-treatment crossover study in 24 healthy adults, researchers compared it against standard curcumin powder and reported:

• Peak blood level (Cmax) 18.4 to 20.5 times higher
• Total exposure (AUC) 35.9 to 42.6 times higher
• Median time to peak 1.5 to 3 hours, versus 8 hours for unformulated curcumin

Those figures describe absorption, not outcomes. A separate 2025 randomized, double-blind, placebo-controlled trial in 71 healthy adults found significant decreases in total oxidant status and an oxidative stress index after 8 weeks. Two markers in that same trial, MDA and 8-OHdG, did not change significantly. Both results belong in the story.

One important distinction: that trial used Theracurmin Super, a different SKU generation from Theracurmin HP. The two should not be treated as interchangeable.

Lavela WS 1265: the lavender oil with a clinical file

Lavela WS 1265 uses the same standardized lavender oil preparation studied in the literature under the name silexan. A 2025 narrative review of six clinical trials reported that:

• The trials enrolled adults with subthreshold and generalized anxiety disorders, and the review describes results in that population as favorable over 10 weeks of daily use
• Adverse events were limited to eructation and mild, transient digestive complaints, with no sedation, dependence, abuse potential, sexual dysfunction, weight gain, or withdrawal reported

A 2026 real-world analysis of 67,340 adults found that long-term users did not show higher rates of complaints compatible with known adverse effects during therapy than before it.

What this is and is not: these are published findings about a studied preparation, reported with attribution to the researchers. Much of that published file, including the review cited above, was funded by or authored by researchers with disclosed financial ties to the manufacturer of the silexan preparation, which is also the parent company of this brand. They are not claims that this product treats any condition.

Where the Evidence Is Thin

We would rather tell you where the file is empty than let you assume it is full. Three honest gaps.

1. The controlled trial evidence for elemental diet formulas in inflammatory bowel disease is small, old, and weaker than the marketing suggests. Two small randomized trials from the 1980s reported remission in active Crohn's disease with an elemental diet, and later Cochrane reviews found only very low quality evidence, concluding that enteral nutrition may be less effective than corticosteroids in adults and possibly more effective in children. This is the biggest gap, and it matters because elemental formulas are the flagship category. Here is what actually exists:

• A 2026 web-based survey of 150 patients with inflammatory bowel disease found that 31% of those with Crohn's disease were currently using elemental diets, most at 300 to 900 calories per day, with some reporting symptom improvement. A survey records what people do. It cannot show that a formula caused an outcome.
• A 2026 retrospective study of 39 children combined partial enteral nutrition with a drug and reported complete mucosal healing in 7 of 21 versus 1 of 18 on partial enteral nutrition alone. That is a drug plus nutrition combination, not an elemental diet on its own.
• A 2026 review of dietary therapy in eosinophilic esophagitis notes that elemental diets remain "the most effective but are often impractical." That is a statement about a whole diet pattern in one specific condition, not about a supplement.

If you see a page claiming elemental diet formulas are clinically proven to induce remission as a routine treatment, that claim overstates an evidence base that is thin, dated, and inferior to standard drug therapy in adults. Our own elemental diet guide walks through the same evidence in more detail.

2. No human trial data was found on the brand's CoQ10, K-PAX, Cortisol Manager, or Probiotic Pearls formulas specifically. These are well-built products with solid ingredient-level rationale. Ingredient rationale is not the same thing as formula-level proof.

3. Independent verification of the line is thin. ConsumerLab has tested exactly one Integrative Therapeutics product, and the full result sits behind a paywall. Only the fact that one product was tested and reviewed is public; the approval result itself is not. The quality infrastructure described above rests largely on the company's own disclosures plus its GMP and ISO accreditations.

How to Choose Your First Product

If you are new to the brand, the shortest path looks like this:

1. Start with one goal, not a stack. Pick the single group above that matches what you are actually trying to support.
2. Match the format to your routine. Capsules and softgels for daily use, powders for the elemental products.
3. Buy the smallest size first. Theracurmin HP, Cortisol Manager, and Lavela all come in smaller counts for a trial run.
4. Check the label against anything you already take. Clinical-dose formulas mean real amounts of real ingredients. That is a reason for care, not a reason to avoid.
5. Ask before you guess. If you take prescription medication or manage a health condition, review the formula with your clinician before you start.

The Agape Nutrition team carries this line direct, with no practitioner gate and no account required. You can see the full Integrative Therapeutics range at Agape in one place.

If you would rather start with a short list than the full catalog, these are the four formulas this guide points to: the two with dedicated evidence sections, plus one standout from the digestive group and one from the mitochondrial group.

What We Recommend

References

1. Chung H, Yoon SH, Cho JY, Yeo HK, Shin D, Park JY. Comparative pharmacokinetics of Theracurmin, a highly bioavailable curcumin, in healthy adult subjects. International Journal of Clinical Pharmacology and Therapeutics, 2021.
2. Li X, Kim DY, Sung Y, Kim D, Ahn S, et al. Effects of 8-week Theracurmin Super supplementation on exercise-induced oxidative stress. Integrative Medicine Research, 2025.
3. Kasper S, Eckert T. Silexan in anxiety, depression, and related disorders: pharmacological background and clinical data. European Archives of Psychiatry and Clinical Neuroscience, 2025.
4. Volz HP, Rosemann T, Burkart M, Reineke T, Kostev K. Silexan is well-tolerated for long-term use in adults and for treatment of adolescents: a real-world data analysis. European Archives of Psychiatry and Clinical Neuroscience, 2026.
5. Esaki M, Matsumoto T, Hirai F, Suzuki T, Hosoi Y, Oota A, Higashikawa M, Umeyama M, Ueno M. Nutrition management and self-perceived relapse triggers in patients with inflammatory bowel disease: results from the 3R web-based survey. Crohn's & Colitis 360, 2026.
6. Kaji E, Yoden A, Namba T, Nishimoto S, Otani M, Okuhira T, Inoue K, Aomatsu T, Nishioka D, Ashida A. Combining thiopurine with partial enteral nutrition promotes complete mucosal healing in pediatric Crohn's disease. Pediatrics International, 2026.
7. Perananthan V, Snyder DL. Dietary Therapy in Eosinophilic Esophagitis (EoE): A Practical Approach to Elimination. Current Gastroenterology Reports, 2026.
8. O'Morain C, Segal AW, Levi AJ. Elemental diet as primary treatment of acute Crohn's disease: a controlled trial. British Medical Journal (Clinical Research Ed.), 1984;288(6434):1859-1862.
9. Narula N, Dhillon A, Zhang D, Sherlock ME, Tondeur M, Zachos M. Enteral nutritional therapy for induction of remission in Crohn's disease. Cochrane Database of Systematic Reviews, 2018.

Frequently Asked Questions