Bottom line Cymbiotika’s liposomal vitamin C and glutathione work, but you are paying a steep premium for a packet, a flavor, and branding. For most people, a cheaper Amazon liposomal capsule from Codeage or NOW does the same job for a fraction of the price. Best for: People who genuinely prefer a flavored gel pouch

Bottom line MaryRuth’s Organic Liquid Probiotic is a genuinely gentle, well-certified daily probiotic that works for kids and sensitive adults, but at “up to” 2 billion CFU it is one of the lowest-dose options you can buy. For a specific gut complaint, a higher-CFU capsule does more for less money. Best for: kids age 4

Bottom line BioGaia Protectis is the probiotic with the most colic research behind it, and that research is genuinely encouraging for breastfed babies. It is reasonable to try with your pediatrician’s input, but it is not a guaranteed fix and the evidence is weakest for formula-fed infants. Best for: breastfed, otherwise-healthy infants with colic whose

Bottom line Florastor is a genuinely useful niche probiotic, not an everyday one. Its yeast, Saccharomyces boulardii, keeps working through a course of antibiotics that would wipe out bacterial probiotics – so it earns its spot during antibiotics and for travel, and is overkill for routine gut maintenance. Best for: anyone starting a course of

Bottom line For most people, Garden of Life Dr. Formulated is the better buy – a 50 billion CFU, 15-to-16 strain shelf-stable capsule for under a dollar a day. Seed DS-01 is worth its premium only if you specifically want its 24 named, study-matched strains and capsule-in-capsule prebiotic delivery. Best for: Garden of Life for