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title: CASI.org | Evidence-based Wellness Education Publication of Designs for Health
---

An **educational publication of Designs for Health**

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Featured · Research & Education

# When the Labs Come Back *Normal*

Conventional panels are built to identify a condition, not to explain why symptoms persist without one. Functional testing reads the metabolites and byproducts around those pathways instead — and is meant to sit alongside standard labs rather than replace them.

Quick Take · 30-second read

- Conventional labs ask what condition is present; functional testing asks why the symptoms are there, reading patterns across metabolites rather than markers one at a time
- Four tests cover distinct ground — GI microbial, organic acids, genomic analysis and urinary hormone — and most are non-invasive enough to collect at home
- Results need a qualified practitioner to read them: the risk of unguided testing is misinterpretation and cost, not a wrong number

JM Jesse Martin, MS Apr 28, 2026 6 min read 5 references

[Read the article →](https://www.casi.org/articles/functional-testing-clinical-insight?hsLang=en)

![Beyond Standard Labs: How Functional Testing Enhances Clinical Insight](https://www.casi.org/hs-fs/hubfs/Image%209-14-26%20at%202.53%20PM.png?width=960)

 Practice Guide

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Cited Studies

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## Latest in each section

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### [Science Update A Case Series on an Allulose-Containing Gummy in Healthy Adults Monitored by Continuous Glucose Monitoring **5 min** Sep 09](https://www.casi.org/articles/a-case-series-on-an-allulose-containing-gummy-in-healthy-adults-monitored-by-continuous-glucose-monitoring?hsLang=en)

### [Research & Education Hydrolyzed Whey Protein for Athletes: Enhanced Digestibility, Absorption, and Recovery **5 min** Jun 30](https://www.casi.org/articles/hydrolyzed-whey-protein-for-athletes-enhanced-digestibility-absorption-and-recovery?hsLang=en)

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## Recent articles

### [![A Case Series on an Allulose-Containing Gummy in Healthy Adults Monitored by Continuous Glucose Monitoring](https://www.casi.org/hs-fs/hubfs/Sept-CASI-Allulose%20%281%29.jpeg?width=960) Science Update A Case Series on an Allulose-Containing Gummy in Healthy Adults Monitored by Continuous Glucose Monitoring Explore a CGM-monitored case series on how an allulose gummy may help reduce postprandial glucose spikes and glycemic variability in healthy adults. Sep 09, 2026 Read →](https://www.casi.org/articles/a-case-series-on-an-allulose-containing-gummy-in-healthy-adults-monitored-by-continuous-glucose-monitoring?hsLang=en)

### [![A Case Report on Vitamin C Supplementation in a 67-Year-Old Male with Leukopenia](https://www.casi.org/hs-fs/hubfs/July-21_Leukopenia-vita-c_460547506.jpeg?width=960) Science Update A Case Report on Vitamin C Supplementation in a 67-Year-Old Male with Leukopenia Explore a case report on oral vitamin C supplementation and changes in white blood cell and neutrophil counts in a 67-year-old man with chronic leukopenia. Jul 21, 2026 Read →](https://www.casi.org/articles/a-case-report-on-vitamin-c-supplementation-in-a-67-year-old-male-with-leukopenia?hsLang=en)

### [![Hydrolyzed Whey Protein for Athletes: Enhanced Digestibility, Absorption, and Recovery](https://www.casi.org/hs-fs/hubfs/June-30-Hydrolyzed-Whey-Protein-for-Athletes.jpeg?width=960) Research & Education Hydrolyzed Whey Protein for Athletes: Enhanced Digestibility, Absorption, and Recovery Discover the benefits of hydrolyzed whey protein for athletes, including faster absorption, easier digestion, muscle growth, and post-workout recovery. Jun 30, 2026 Read →](https://www.casi.org/articles/hydrolyzed-whey-protein-for-athletes-enhanced-digestibility-absorption-and-recovery?hsLang=en)

### [![B Vitamins 101: Functions, Food Sources, and Daily Requirements](https://www.casi.org/hs-fs/hubfs/June-25-B-Vitamins-101.jpeg?width=960) Research & Education B Vitamins 101: Functions, Food Sources, and Daily Requirements Explore all eight B vitamins, their functions, best food sources, daily requirements, deficiency risks, and preferred supplement forms for optimal health. Jun 25, 2026 Read →](https://www.casi.org/articles/b-vitamins-101-functions-food-sources-and-daily-requirements?hsLang=en)

### [![A Clinical Trial on Geranylgeraniol Supplementation for Testosterone Support in Middle-Aged Adults](https://www.casi.org/hs-fs/hubfs/casi/archive/june16-gg-testosterone.jpg?width=960) Science Update A Clinical Trial on Geranylgeraniol Supplementation for Testosterone Support in Middle-Aged Adults Geranylgeraniol did not raise testosterone overall, but a trial found men with lower baseline levels saw about a 28 ng/dL increase after supplementation. Jun 17, 2026 Read →](https://www.casi.org/articles/geranylgeraniol-supplementation-testosterone-support?hsLang=en)

### [![PCOS Is Now PMOS: Understanding the New Terminology and Its Metabolic Implications](https://www.casi.org/hs-fs/hubfs/June-11-PCOS-is-Now-PMOS.jpeg?width=960) Research & Education PCOS Is Now PMOS: Understanding the New Terminology and Its Metabolic Implications PCOS is now PMOS. Learn what polyendocrine metabolic ovarian syndrome means and how insulin resistance influences symptoms and long-term metabolic health. Jun 11, 2026 Read →](https://www.casi.org/articles/pcos-is-now-pmos-understanding-the-new-terminology-and-its-metabolic-implications?hsLang=en)

### [![Magnesium Supplementation 101: Choosing the Best Form for Your Patient’s Needs](https://www.casi.org/hs-fs/hubfs/June-2-Magnesium-Supplementation-101.jpeg?width=960) Research & Education Magnesium Supplementation 101: Choosing the Best Form for Your Patient’s Needs Compare types of magnesium supplements, including glycinate, malate, L-threonate, and citrate, to choose the best form for sleep, energy, and digestion. Jun 02, 2026 Read →](https://www.casi.org/articles/magnesium-supplementation-101-choosing-the-best-form-for-your-patients-needs?hsLang=en)

[All Articles](https://www.casi.org/articles?hsLang=en)

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Most read this month

1. 01
   
   [Taurine and Glycine: The Benefits of Combining These Two Amino Acids](https://www.casi.org/articles/taurine-and-glycine-benefits-combining-amino-acids?hsLang=en)
   
   Research & Education
2. 02
   
   [Magnesium Glycinate Chelate Buffered: A Smart Approach to Magnesium Supplementation](https://www.casi.org/articles/magnesium-glycinate-chelate-buffered-a-smart-approach-to-magnesium-supplementation?hsLang=en)
   
   Research & Education
3. 03
   
   [Ubiquinone vs. Ubiquinol: Does the Form of CoQ10 Matter – Or Is Delivery the Real Key?](https://www.casi.org/articles/ubiquinone-ubiquinol-coq10-delivery?hsLang=en)
   
   Research & Education
4. 04
   
   [B Vitamins 101: Functions, Food Sources, and Daily Requirements](https://www.casi.org/articles/b-vitamins-101-functions-food-sources-and-daily-requirements?hsLang=en)
   
   Research & Education
5. 05
   
   [The Latest Clinical Research on Zeolite and Heavy Metal Detoxification](https://www.casi.org/articles/latest-clinical-research-zeolite-heavy-metal-detoxification?hsLang=en)
   
   Research & Education
6. 06
   
   [Allulose: A Rare Sugar That Supports Postprandial Glycemic Control and Metabolic Flexibility](https://www.casi.org/articles/allulose-postprandial-glycemic-control-metabolic-flexibility?hsLang=en)
   
   Research & Education
7. 07
   
   [Lactium®: A Milk-Derived Bioactive Peptide for Supporting Stress Resilience and Emotional Well-Being](https://www.casi.org/articles/lactium-bioactive-peptide-stress-resilience?hsLang=en)
   
   Research & Education
8. 08
   
   [Magnesium Supplementation 101: Choosing the Best Form for Your Patient’s Needs](https://www.casi.org/articles/magnesium-supplementation-101-choosing-the-best-form-for-your-patients-needs?hsLang=en)
   
   Research & Education

30+

Years of practitioner-grade nutrition science via Designs for Health

423

Articles, fully referenced to peer-reviewed primary literature

100%

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## Continue your research

#### [Research & Education How Akkermansia Supports GLP-1 Production and Metabolic Function May 27, 2026](https://www.casi.org/articles/akkermansia-supports-glp-1-production-metabolic-function?hsLang=en)

#### [Research & Education Magnesium Glycinate Chelate Buffered: A Smart Approach to Magnesium Supplementation May 21, 2026](https://www.casi.org/articles/magnesium-glycinate-chelate-buffered-a-smart-approach-to-magnesium-supplementation?hsLang=en)

#### [Research & Education Overcoming the Anaerobic Barrier: A New Approach to Probiotic Manufacturing May 12, 2026](https://www.casi.org/articles/overcoming-the-anaerobic-barrier-a-new-approach-to-probiotic-manufacturing?hsLang=en)

#### [Science Update A Case Report on a Functional GI Testing Protocol in a 35-Year-Old Female with Gastrointestinal and Joint Discomfort May 07, 2026](https://www.casi.org/articles/a-case-report-on-a-functional-gi-testing-protocol-in-a-35-year-old-female-with-gastrointestinal-and-joint-discomfort?hsLang=en)

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