Living with Multiple Chemical Sensitivity (MCS)

Introduction:

Living with Multiple Chemical Sensitivity (MCS) can turn the safety of home into a constant source of illness. Everyday exposures—paints, cleaners, fragrances, or mold—can trigger severe reactions like migraines, fatigue, or breathing difficulties. This article explores what MCS is, how mold exposure often worsens it, and the safe, non-toxic tools available to help restore a healthy indoor environment.

Key Takeaways:

• For The Mold Sensitive, Non-Toxic Approach to Safer Indoor Air
• What Is Multiple Chemical Sensitivity (MCS)?
• How Mold Exposure Triggers or Worsens MCS
• Why These Can Be Harmful
• Fogging or Misting Chemical Solutions Can Make Things Worse
• HavenFog™ is an Excellent DIY product for People with MCS and Mold Illness
• What Kind of Residue Does Propylene Glycol Leave?
• The “HEPA Sandwich” Method for Deep Cleaning Before or After Fogging
• How Safe is Propylene Glycol for MCS?
• When to Use HavenFog™ vs HavenMist™
• The DIY Advantage with BioBalance
• Breathe Without Fear
• FAQs: Multiple Chemical Sensitivity & HavenFog

For The Mold Sensitive, Non-Toxic Approach to Safer Indoor Air

For all people, home should be a place of peace and recovery. But for those with Multiple Chemical Sensitivity (MCS), especially those who have lived in mold-contaminated environments, the home itself becomes the cause of illness.

New homes, manufactured building materials, paint, varnish, carpets, flame retardants on furniture, etc. can release Volatile Organic Compounds (“VOCs”) into the air. Formaldehyde is almost ubiquitous as a common ingredient for manufactured building products and commercial goods. Even a whiff of perfume, bleach, air freshener, petroleum products, cooking food, or other chemical fragrance can trigger violent reactions: migraines, brain fog, nausea, shortness of breath, dizziness, or worse. MCS is often misunderstood by medical professionals and dismissed by others, but for those suffering, it’s profoundly disabling.

Over the years working with mold-sensitive individuals and helping families recover their homes after mold exposure, I’ve witnessed the discomfort and the trauma of chemical sensitivity. Many people develop MCS after mold illness. And once the immune system has been sensitized, even the smallest exposures can set off a chain of reactions that feel like an ‘being poisoned.’  MCS is also considered a diagnosis of exclusion.  Physicians diagnose MCS when the symptoms do not lead to a clear medical diagnosis.  Symptoms can have similarities to those from Chronic Fatigue Syndrome, Fibromyalgia, electromagnetic hypersensitivity, and Lyme disease.

I should also remind you that our noses are exquisitely sensitive, capable of detecting some odors at parts per billion, so for individuals with Multiple Chemical Sensitivity, even faint exposures can feel overwhelming. This heightened perception, the brains ‘fight or flight’ response prior to information processing, combined with repeated toxic or distressing encounters, can create a form of environmental PTSD, where smells alone trigger fear, anxiety, and physical symptoms.

This article aims to provide a considerate, technically grounded, and actionable plan to understanding MCS, its connection to mold exposure, and how safe tools like HavenFog™ can play a central role in restoring the home environment, without causing more harm.

What Is Multiple Chemical Sensitivity (MCS)?

MCS is a chronic, acquired condition with symptoms characterized by adverse reactions to low-level chemical exposures that do not affect the general population. These chemicals include:

• Cleaning agents and disinfectants
• Fragrances, perfumes, scented products
• Laundry detergents and fabric softeners
• Paints, glues, solvents, and off-gassing from plastics
• Air fresheners and scented candles
• Pesticides, herbicides, and some “natural” essential oils

Common MCS Symptoms:

• Brain fog, confusion, memory issues
• Shortness of breath, wheezing, asthma flares
• Headaches and migraines
• Fatigue, joint pain, muscle weakness
• Nausea, stomach upset
• Skin irritation, hives, or rashes
• Anxiety or mood instability

While the condition is still considered controversial in some mainstream medical circles, MCS is increasingly recognized under the umbrella of Idiopathic Environmental Intolerance (IEI) by researchers and is acknowledged in clinical guidelines from the WHO, Canadian Human Rights Commission, and others.

How Mold Exposure Triggers or Worsens MCS

Many people with MCS report the onset of symptoms after living in a water-damaged building or moldy home. MCS can also be triggered after a person reaches their body’s lifetime limit for toxins or  “Toxic Load”. Here’s why mold and MCS are closely linked:

1. Immune System Sensitization

Mold exposures include secondary metabolites, mycotoxins, mold volatile organic compounds (mVOCs), and particulate fragments that can overstimulate the immune system. Over time, this causes cross-sensitization, making the body react to other, unrelated chemicals.

2. Inflammatory Overload

Mold can create systemic inflammation, affecting the brain, nervous system, and mitochondria. People exposed to mold in water damaged homes may feel chronically ill, fatigued, or foggy, similar to what is seen in MCS flares.

3. Chemical Cleaners Used on Mold May Worsen Symptoms

Ironically, most remediation involves the use of harsh disinfectants like chlorine dioxide, chemical biocides, chemical fungicides, or quaternary ammonium compounds – substances that can be extremely reactive for MCS patients.

Why These Can Be Harmful

• Volatile Organic Compounds (VOCs) – Many mold remediation chemicals off-gas VOCs that linger in the air and worsen symptoms in sensitive individuals.
• MCS Reactions – Those with mold illness often develop chemical intolerance, meaning these treatments can worsen illness even if mold is remediated.
• Incomplete Remediation – Killing mold doesn’t remove dead spores, mycotoxins, or fragments, which still provoke immune reactions and must be physically removed.
• Hazardous Mixing – Some chemicals can produce toxic byproducts if used near other substances (e.g., mixing bleach with acids can create chlorine gas).
• Environmental Residue – Persistent residue on surfaces, fabrics, or HVAC systems can cause ongoing exposure.

HavenFog™ is an Excellent DIY product for People with MCS and Mold Illness

HavenFog uses USP-grade propylene glycol, a food-grade carrier used in asthma inhalers, IV meds, and even baby wipes. It’s infused with a proprietary blend of citrus seed extract blend designed to neutralize and remove indoor mold loads through agglomeration and Dust and Small Particulate Clean-up Instructions.  The dense fog causes small airborne particles and mold spores to agglomerate, increasing their mass so they fall to surfaces and can be HEPA vacuumed or cleaned using microfiber cloths.  See BioBalance HavenFog Fogging Instruction Sheet.

“The fog acts like a gravitational net, pulling mold and chemical particles out of the air so they can be removed by hand.”

What Kind of Residue Does Propylene Glycol Leave?

• Light, invisible coating: After fogging, propylene glycol may leave a very thin, slightly tacky film on surfaces. This is not always perceptible to the touch.  
• Non-toxic and non-corrosive: This residue is safe for humans, pets, and most surfaces (including electronics and fabrics).
• Easily removed: It can be wiped away with a microfiber cloth or vacuumed using a HEPA vacuum as part of the HEPA sandwich cleaning protocol.
• No off-gassing: Once settled, propylene glycol does not emit VOCs or fumes, making it very safe for chemically sensitive individuals. It typically dissipates within 24 hours.

The “HEPA Sandwich” Method for Deep Cleaning Before or After Fogging

To completely remove mold particulates after fogging with HavenFog, use the HEPA sandwich method:

1. Pre-remediation Fogging of Entire Home including crawlspace and attics  

For mold sensitive people who cannot leave their home and need to buy time for scheduling various remediation contractors 

1. • For mold sensitive people who want to reduce the mold load in the home while performing DIY mold remediation and clearance.
   • Let settle 12+ hours

2. Pre-Clean Moldy Surfaces that are part of home foundation (Frame, floor, joists)

1. • Spray 12% hydrogen peroxide to break biofilms and loosen spores
   • Let it work for 15 minutes
   • See BioBalance Hydrogen Peroxide Instruction Sheet

3. HEPA Vacuum All Surfaces

1. • Use certified HEPA vacuum (e.g., Nilfisk, Atrix, Meile, or Elsea)
   • Vacuum floors, upholstery, vents, mattresses, and furniture

4. Microfiber Wipe Down

1. • Wipe all horizontal and high-touch surfaces with microfiber

5. (Optional) Fogging of Entire Home Again

How Safe is Propylene Glycol for MCS?

Extensive studies and regulatory data confirm that propylene glycol is GRAS (Generally Recognized As Safe) by the FDA, and safe for use in inhaled therapies, food, cosmetics, and medicine.

Key Points:

• Low Volatility (doesn’t significantly off-gas)
• No known carcinogenicity
• Safe for use in nebulizers and asthma meds
• Minimal to no reactivity in MCS individuals (Decades of experience, anecdotal and clinical data)

Anderson et al. (1996) found no adverse respiratory effects in rats or mice exposed to propylene glycol (PG) fog, confirming its safety in inhaled forms.  Short and long term safety studies have not been conducted for PG use in vaping. Low dose, intermittent exposure to PG fog when following instructions is orders of magnitude less exposure than direct dosage into the lungs multiple times daily over lengthy periods, (previously years and now decades.)

The DIY Advantage with BioBalance

For chemically sensitive individuals, professional mold remediation often brings more harm than healing. BioBalance’s suite of products offers a full DIY-friendly, non-toxic, system:

• HavenFog™ – Botanical fog
• Hydrogen Peroxide 12% – Surface cleaner
• ImmunoLytics Mold Test Plates – Air + swab testing
• BioBalance HEPA-Safe Protocols + Free Consultations

This empowers homeowners to remediate, maintain, and monitor their indoor air without exposing themselves to harmful chemicals or invasive contractors.  

“BioBalance DIY suite of products can empower mold sensitive patients to safely fog and clean up debris systemically saving thousands of dollars without the chemical safety concerns”.

Breathe Without Fear

Living with MCS isn’t just about avoiding perfume or switching detergents. It’s about reclaiming your home, your health, and your peace of mind. Vigilance coupled with tools like HavenFog are more than mold solutions, they’re part of a new paradigm of safe, accessible healing for people who’ve long been dismissed.

FAQs: Multiple Chemical Sensitivity & HavenFog

References

1. Miller CS. Mechanisms of Multiple Chemical Sensitivity. Toxicol Ind Health. 2001;17(3):124-131.
2. U.S. Food & Drug Administration. GRAS Notices: Propylene Glycol. FDA.gov
3. Anderson RC, et al. Propylene Glycol Aerosol Inhalation Toxicity in Rats and Mice. Inhalation Toxicology.1996;8(8):783–800.
4. Hope J. A Review of Mold and Mycotoxin Illness. ScientificWorldJournal. 2013;2013:767482.
5. Wisnewski AV, et al. Occupational Exposure to Quats. Ann Allergy Asthma Immunol. 2005;95(6):517–525.
6. Lax SF. Airborne chemical exposure in indoor environments. Clin Rev Allergy Immunol. 2020;58:180–193.

Related Articles

1. The Science and Care of Salvaging your Home From Mold
2. Severity of Toxic Mold Symptoms
3. The Power Behind Propylene Glycol Technology