Autism Spectrum Disorder

Basic First Steps

The information provided is not intended to be a substitute for medical advice from a licensed physician or other qualified healthcare professional.


1. Eat a healthy diet

  • ensure sufficient protein, fats, and cholesterol
  • eat a variety of colourful vegetables and fruit
  • avoid sugar and starches

2. Supplement basic nutrients for support for ASD:

Reason:  broad spectrum nutrient support
Typical dosing: 1–2x day


B-complex (supports brain function, blood sugar control)
Reason: full spectrum of B-vitamins, supports methylation cycle function
Typical dosing: B50 2–4/day

Vitamin C
Reason: antioxidant, anti-inflammatory, supports neurotransmitter production
Typical dosing: 1000–6000 mg/day

Vitamin D
Reason: regulates serotonin production, protects against neuronal oxidative stress
Typical dosing: 1000–5000 IU

Reason: help restore and maintain healthy digestive tract flora
Typical dosing: 10–25 billion bacteria/day

Reason: calms neurotransmission, anti-stress, serotonin and dopamine production, supports action of vitamin B6
Typical dosing: 300–600 mg/day

Fish oil
Reason: anti-inflammatory, brain supportive
Typical dosing: 1000–4000 mg (of fish oil)

3. Identify and remove sources of environmental toxins


1. Consider a trial of GFCF diet

  • Gluten-free, casein-free diet
    • this is the most often recommended diet with ASD
    • allow at least 2 months to assess benefits
    • See “GFCF diet” on this page for more information

2. Continue with basic nutrients for support for ASD, consider including additional nutrients shown to be beneficial with ASD:

Vitamin B6 (in pyridoxal-5-phosphate (P5P) form)
Reason: neurotransmitter metabolism, supports action of magnesium
Typical dosing: 50–100 mg/day

Vitamin B12 (methylcobalamin form)
Reason: neurotransmitter synthesis, brain cell preservation, supports methylation cycle
Typical dosing: 1000–5000 mcg/day

Reason: antioxidant support, neurotransmitter regulation
Typical dosing: 30–50 mg/day

3. Ensure good sleep

Consider supplementing melatonin 1–3 mg if required.

Further information on improving sleep:

4. Work with a health professional who is trained in nutrition and integrative medicine approaches

Trained health professionals can help with:

  • testing for nutrient deficiencies and metabolic contributors to ASD
  • providing custom dietary and supplement protocols