Here's what the research data shows regarding Lactobacillus rhamnosus GG (LGG) and quality of life in children with ADHD.

Quality of Life

According to Pillser's research database, L. rhamnosus GG has been studied for improved health-related quality of life with the following findings¹²:

• Low evidence with a small beneficial effect
• Across 3 studies, 2 reported beneficial effects on health-related quality of life, with one showing a moderate effect size and the other a small effect; the third study found a neutral effect
• Notably, the beneficial effects were observed specifically in children with ADHD, while the neutral trial involved adults with mild-to-moderate ulcerative colitis
• Effects were noted at longer follow-up (3 months) in one trial
• Study durations were generally short (median of 28 days)

Physical Functioning

There is no specific research in Pillser's database directly addressing L. rhamnosus GG's effect on physical functioning in children with ADHD.

Summary

There is limited but promising evidence that Lactobacillus rhamnosus GG may help improve health-related quality of life in children with ADHD, with 2 out of 3 studies showing beneficial effects. However, the evidence is considered low and effect sizes are small. No specific data was found on physical functioning outcomes.

As with any supplement for ADHD, it's important to consult with a healthcare professional before starting, especially for children.

Footnotes

1. Pillser research database, Lactobacillus rhamnosus GG — Improved Health-related Quality of Life ↩

2. Pillser research database, Lactobacillus rhamnosus GG overview ↩