Life Start contains Bifidobacterium infantis NLS and Align contains Bifidobacterium infantis 35624. These are two different strains of the same bacteria. Only Align has undergone clinical testing to establish efficacy and dosage.
Align cost about $1.10 per doses and it does not have to be kept cool. A 1.25 oz bottle of Life Start used for infants costs about $20 and it must be kept cool. It contains about 70 doses (1/4 teaspoon = 1/2 gram = 1 billion CFUs). The cost per dose is about $0.28. It is also available in a 4.5 oz bottle for about $32 giving a cost per dose of about $0.13.
It will be a while before I try it. I have a number of important things I have to get out of the way before I am going to risk destablizing myself Eventually I will give it a try now that I know it is locally available.
-------------------- STABLE: ♂, IBS-D 50+ years - Science of IBS