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Condition

Fragile X Syndrome

Fragile X syndrome is the most common inherited cause of intellectual disability and autism, arising when a change in the FMR1 gene on the X chromosome stops the body from making FMRP, a protein the developing brain needs. Little research on supplements for it has been reviewed here so far, so there are no trial findings to report yet. Omega-3 fatty acids and melatonin have the most support in related areas, but that is not the same as evidence in people with Fragile X.

Supplements studied
1
Graded outcomes
0
Trials
1
People studied
56

Evidence by supplement

  • Strong
  • Moderate
  • Limited
  • Very limited

1 supplement

L-Carnitine: outcomes studied for Fragile X Syndrome
GradeOutcomeEffectSizeStudiesPeopleStudies list
ADHD SymptomsImproves (the measure goes down)4 studies56 people

The Fragile X Syndrome Supportive Care protocol

2 primary supplements · 7 supporting supplements

  • Omega-3 Fatty Acids1–2 g EPA+DHA daily (adjust for age/weight in children)
  • Vitamin D1,000–2,000 IU daily (children); 2,000–4,000 IU daily (adults)

See the full protocol

Studies cited

4 studies from PubMed

  1. A double-blind, parallel, multicenter comparison of L-acetylcarnitine with placebo on the attention deficit hyperactivity disorder in fragile X syndrome boysAm J Med Genet A · PMID 18286595
  2. Efficacy of carnitine in the treatment of children with attention-deficit hyperactivity disorderProstaglandins Leukot Essent Fatty Acids · PMID 12213433
  3. Acetyl-L-carnitine as an adjunctive therapy in the treatment of attention-deficit/hyperactivity disorder in children and adolescents: a placebo-controlled trialChild Psychiatry Hum Dev · PMID 21336630
  4. Acetyl-L-carnitine (ALC) in attention-deficit/hyperactivity disorder: a multi-site, placebo-controlled pilot trialJ Child Adolesc Psychopharmacol · PMID 18315451