Gut Health

Classic psyllium fiber with some of the strongest evidence in the aisle for regularity and LDL cholesterol, at about 19 cents a teaspoon. Contains aspartame and dye.

One capsule of 10 billion CFU Lactobacillus rhamnosus GG plus 200 mg inulin, with potency guaranteed to expiration, for about 60 cents a day.

A 24-strain probiotic plus pomegranate prebiotic backed by its own 350-person trial on bloating and gas. Strong science, premium price.

NSF Certified for Sport greens drink with a full multivitamin and 10 billion viable cells of five named probiotics, but over $3 a scoop with two proprietary blends.

Amazon's mega-seller: 60 billion CFU from 10 species plus prebiotic fiber, third-party tested and cheap. But it names no strains, so it can't be matched to research.

A tasty plant-based shake with 25 g protein, 6 g fiber and 26 vitamins and minerals, but at about $4.66 a serving its long superfood list is mostly undosed.

A '10 types of collagen' blend with vitamin C and a probiotic; heavily marketed, but the collagen sources sit in an undisclosed blend and it costs more per gram.

Two of the best-studied probiotic strains (LGG, BB-12) at 11B CFU guaranteed to expiration, plus a phage prebiotic and tributyrin. Top testing, premium price.

A cheap, single-ingredient konjac fiber (1,725 mg per serving) taken before meals for fullness. Honest and GMP-made, but the average weight effect in trials is small.

A certified-organic, unsweetened juiced-greens powder with 40 whole-food ingredients and no stevia; clean and affordable, but earthy tasting and dosed in blends.

One of the longest-selling greens powders: 5.4 g of grasses and greens plus a studied probiotic for under $1 a scoop, with plain-grassy taste and a Prop 65 lead warning.

A viral daily pack of greens gummies that delivers a real multivitamin and 6 g of fiber, but the 'superfoods' sit in one 8.7 g blend and the original has 8 g added sugar.

A doctor-recommended single strain with IBS research behind it, but only 10 million CFU is guaranteed by the best-by date, and trial results are mixed.

The TikTok-famous 'debloat' greens drink: sweet, cheap per scoop and easy to mix, but built on seven proprietary blends with no probiotic CFU count.

A cheaper AG1 alternative with 7.3 g of organic greens and 5 billion CFU of named probiotics, but a January 2026 Class I Salmonella recall weighs heavily on trust.

A smooth, low-caffeine (48 mg) organic mushroom coffee that went viral, but its 2 g six-mushroom blend is far below doses used in research.

Social media's favorite debloat capsule: ginger plus a proprietary herb and bromelain blend. Clean and tested, but the evidence is thin and it costs about $1.70 a dose.

A novel Akkermansia, C. butyricum and B. infantis probiotic sold on the GLP-1 buzz. It contains no GLP-1, has no human appetite trial and costs $64–89 a month.