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Bifidobacterium longum
Eat the fibre first. This capsule only earns its money in a gut that hurts.
Bifidobacterium lactis
Buy it by the strain name, take it for regularity, ignore the rest of the box.
Bifidobacterium infantis
Buy the 35624 strain for a gut that plays up. Ignore the rest of the box.
Beta-Sitosterol
Take it if you're up twice a night, but it won't shrink the prostate.
Beta-Glucans
Get it from oats for your cholesterol. Skip the yeast immune capsules.
Beta-Alanine
Take beta-alanine for efforts that burn. It won't change how you look.
Berberine
Take berberine if your glucose or LDL is high. Skip it for weight loss.