bifidobacterium

It mimics what happens to the gut as people age (PMC4990546) and increasing bifidobacterium, in research, improves dementia symptoms.

Foods rich in good probiotic bacteria, such as strains of lactobacillus and bifidobacterium are a good place to start.

Moreover, plant-based proteins like pea proteins have been shown to increase gut-commensal Bifidobacterium and Lactobacillus while decreasing pathogenic Bacteroides fragilis.

In the guts of people with allergies, ibs, asthma, and cystic fibrosis there are decreased amounts of certain strains of bifidobacterium.

Greek yogurt with active cultures and sour milk with lactobacillus acidophilus and bifidobacterium lactis.

* However, just because you have more Bifidobacterium doesn't necessarily mean it's beneficial, it could mean that your body isn't digesting lactose properly.

However, most of beneficial bacteria as Enterococcus faecalis, Enterococcus faecium, Bacillus badius, Bifidobacterium adolescentis and Lactobacillus spp.

The two strains I see are Lactobacillus helveticus Rosell-52 and Bifidobacterium longum Rosell-175 (there may be others I'm unaware of).

While bifidobacterium is usually dominant on the lactate-producing side, the same function can be (and is) fulfilled by other primary colonisers, such as Staphylococcus.

Supplementation with Bifidobacterium adolescentis, a species that is markedly associated with the alleviation of obesity in the study participants, protects male mice from diet-induced obesity.

From the little research I've done, it looks like the bifidobacterium genus, in particular certain strains of bifidobacterium longum [0,1] and infantis [2], have favorable effects on IBS and anxiety.

Human infant intestines in the ancestral environment are natively colonized by bifidobacterium infantis, which completely metabolizes oligosaccarides present in human breast milk and outputs highly acidic byproducts.

I posted some studies above about two probiotic strains that have specifically been studied for mood enhancement aka "psychobiotics": Lactobacillus helveticus Rosell-52 and Bifidobacterium longum Rosell-175.

Most have lactobacillus (which is technically a firmicutes, but considered a "good firmicutes" I guess, and is used to make yoghurt) or bifidobacterium (like Align) which is in a completely separate family (Actinobacteria).

Bifidobacterium infantis 35624 also looks interesting.

Things like inulin or resistant starch are very important to avoid having too many Bacteroides and too few Bifidobacterium, which is one of the big differences in westernized human guts vs more traditional ones.