I searched on Vitacost for a kosher and vegan probiotic and UP4 turned up. UP4 is a company founded in 1979 that focuses on probiotics. They have a few different products that are tailored to your specific needs, including one for children, one for women (the one I tried), one for seniors, etc, so they get points for having a nice selection.
All of the supplements aid in digestion, some just have some extra perks thrown in to the mix. The women's supplement has organic cranberry in it to help with urinary tract infections. I personally don't suffer from these and thought I made a mistake by ordering this one first but after emailing the company, I was reassured that this would serve my digestive needs just as well. I think the packaging is well designed-- I like the color they chose, and while this might seem strange to say about a bottle of pills, I felt like it was kind of down-to-earth and inviting, not like the typical blah, sterile looking bottle of pills. I also think the tagline they chose (A Happier Inside) is spot on!
A box of this probiotic contains a jar with a one month supply of capsules, meant to be taken twice a day, before meals or with food. Once opened, it needs to be refrigerated. Thankfully, the pills aren't horse pills (in my opinion), and I had no problem getting them down with food.
On the very first day of taking them, I had the slightest, barely even detectable discomfort, so perhaps that's just me. But the effects of the probiotics were immediate. Not almost immediate but immediate. Even after eating potatoes, the amount of flatulence and the nature of it was much different. A lot more tolerable, I'd say. I was pretty much sold on these right off the bat and continued to enjoy their benefits throughout the month. I haven't gone through the whole bottle yet, but I made sure to order another bottle to have around when it's finished so that I don't get stuck without. A I mentioned above, their tagline is pretty on the nose-- these really do make for a happier inside! That said, I think I have pinpointed the nightshades to be problematic for me so I am trying to cut back.
In any case, I highly highly recommend this company/brand of probiotics. If you're looking for one, this might be the way to go for you and they are often on sale, at the Vitacost site at least.
