Probiotics and increased focus and concentration

Lactobacillus reuteri consumption increased testosterone levels.

References:

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0084877

http://www.ncbi.nlm.nih.gov/pubmed/24392159

I consumed probiotic capsule from 21st Century for 10 days (1 capsule a day in the morning after breakfast)

21st Century Probiotics contains 8 billion “friendly bacteria”, of four types :
 
Lactobacillus Acidophilus - 2 billion cfu/100mg
Lactobacillus Salivarius - 2 billion cfu/100mg
Bifidobacterium Bifidum - 2 billion cfu/100mg
Streptococcus Thermophilus - 2 billion cfu/100mg


The positive effects:

1. Increased and sustained focus and concentration
2. Increase in working memory

Negative effects
1. Decreased speed while walking
2. Decreased libido
3. Slightly worsened stuttering