The pungent compound in mustard, horseradish, and wasabi. At food-level amounts it gently activates the body's own cleanup and antioxidant defenses and fights bacteria and fungi. Cancer-protective and anti-inflammatory hints rest mostly on lab and animal work. Concentrated amounts irritate and burn; the safety margin is wide at food levels, but human evidence is thin. (Full Review)

Protocol

Primary Approach

Whole foods

AITC is delivered through mustard, horseradish, wasabi, and ~1 cup/day of cruciferous vegetables rather than the isolated compound

Preparation

Raw or lightly prepared

Foods are eaten raw, or a raw myrosinase source (mustard powder) is added to cooked cruciferous foods, since prolonged heat destroys the enzyme that forms AITC

Dosing

Divided, with meals

Intake is spread across the day and paired with meals to sustain pathway activation and buffer gastrointestinal irritation

Time to effect

Enzyme Induction

Hours–days

Phase II detoxification-enzyme activity is measurable within hours to a few days of exposure

Cancer / Longevity Benefit

Years

Any cancer-preventive or longevity benefit is a long-term, cumulative proposition from sustained dietary pattern

Benefits

Medium: Carcinogen detoxification via phase II enzyme induction; broad-spectrum antimicrobial activity

Low: Cancer-risk reduction; anti-inflammatory effects; antioxidant and cellular stress resistance

Speculative: Metabolic and anti-obesity effects; direct anti-tumor / pro-apoptotic activity; cardiovascular and endothelial support

Contraindications

Pregnancy and breastfeeding

Active peptic ulcer disease or acute gastrointestinal inflammation

Poorly controlled reactive airway disease

Iodine-deficient thyroid disease

Key Interactions

Cytochrome P450–metabolized drugs (e.g., acetaminophen, CYP1A2 substrates)

Topical counterirritants and rubefacients

Anticoagulant and antiplatelet agents (e.g., warfarin, aspirin, clopidogrel)

Other Nrf2-activating isothiocyanate supplements (e.g., sulforaphane)

Iodine and thyroid-support supplements

Glutathione-depleting stress (heavy alcohol, acetaminophen overdose risk)

Risk & Side Effects

High: Gastrointestinal and oral mucosal irritation; skin irritation and allergic contact dermatitis

Medium: High-dose genotoxicity and rodent bladder carcinogenicity; respiratory and airway irritation

Low: Drug-metabolizing enzyme interactions; pro-oxidant effects at high concentrations

Speculative: Goitrogenic / thyroid effects; reproductive and developmental concerns

Monitoring

Marker	Target	Why
TSH	0.5–2.5 mIU/L	Screens for thyroid suppression from high isothiocyanate intake
Free T4	1.0–1.5 ng/dL	Confirms adequate thyroid output alongside TSH
Free T3	3.0–4.0 pg/mL	Detects reduced conversion or thyroid output
Urinary iodine	100–200 µg/L	Confirms iodine adequacy that offsets goitrogenic risk
Urinary isothiocyanate	Higher reflects greater intake (research marker)	Objective marker of actual isothiocyanate exposure

Cadence: Baseline, follow-up at ~3 months, then every 6–12 months

Qualitative Assessment

Digestive tolerance: no mouth, throat, or stomach burning after intake
Energy and general well-being: stable energy without new fatigue
Skin and airway comfort: no new dermatitis or airway irritation

AITC for Health & Longevity

Protocol

Benefits

Risk & Side Effects

Monitoring

Qualitative Assessment