Guides
Buyer's research, written straight
Plain-English explainers on how these ingredients work, what the doses mean, and how to choose. No hype.
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Sweetener ScienceWhat Artificial Sweeteners Do to Your Gut Bacteria: The New Research
Sucralose, saccharin, aspartame and ace-K were sold as inert. A decade of microbiome research says otherwise, except for the trials that found nothing at all. Here's what's actually established.
Jul 27, 2026 -
Ingredient ScienceThe Science of Chromium for Cravings: One Real Signal, a Lot of Overreach
Chromium picolinate is the classic 'stop sugar cravings' pill. The reputation traces to one specific study in an unexpected place. Here's what the human evidence actually supports, and where the marketing runs way past it.
Jul 24, 2026 -
Ingredient ScienceThe Science of Akkermansia Muciniphila: The Mucus-Eating Gut Bug With a GLP-1 Angle
Akkermansia muciniphila is the hyped gut bacterium behind half the 'metabolic health' probiotics on the shelf. Here's what the human data actually shows, where the GLP-1 story comes from, and the twist most labels leave off.
Jul 23, 2026 -
Ingredient ScienceThe Science of Amarasate (Bitter Hops Extract): A Real Mechanism With a Replication Problem
Amarasate is a New Zealand bitter hops extract sold as a 'bitter brake' on appetite. Three human trials say it cuts hunger and food intake. One independent trial found nothing. Here's what the evidence actually supports.
Jul 21, 2026 -
Ingredient ScienceThe Science of African Mango (Irvingia): A Fat-Burner Built on Two Small Trials
African mango (Irvingia gabonensis, dika nut) powered a decade of fat-burner ads. Here's what the human trials actually show, why one lab produced most of them, and what happened when an independent team tried to replicate the weight loss.
Jul 20, 2026 -
Ingredient ScienceThe Science of Chicory Inulin: The Prebiotic Fiber in Half Your 'Gut Health' Cart
Chicory inulin is the quiet prebiotic fiber hiding in gut-health powders, protein bars, and 'natural GLP-1' drinks. Here's what the human trials actually show for your microbiome, appetite, and blood sugar, and the dose where it stops being friendly.
Jul 17, 2026 -
Ingredient ScienceThe Science of Psyllium Husk: The Boring Fiber With All the Receipts
Psyllium is the plain, decades-old fiber in the tub your grandparents kept in the cupboard. It's also the one with the deepest human evidence for blood sugar, cholesterol, and fullness. Here's what the trials actually show, and the one safety rule you can't skip.
Jul 16, 2026 -
Ingredient ScienceButyrate and GLP-1: A Real Mechanism With a Delivery Problem
Your gut bacteria make butyrate from fiber, and it genuinely talks to the cells that release GLP-1. Whether swallowing butyrate in a capsule does the same thing is a separate question, and the human trials have been humbling.
Jul 15, 2026 -
Gut-Brain ScienceWhat Is the Gut-Brain Axis, and Why Does It Decide What You Crave?
The gut-brain axis is the two-way communication network between your digestive tract and your brain, running on nerves, hormones, microbial metabolites, and immune signals. Here's what it actually does, why hunger is a signal rather than a character flaw, and which popular claims about it don't hold up.
Jul 15, 2026 -
Ingredient ScienceAllulose, Honestly: The Rare Sugar That Tastes Like Sugar and Barely Acts Like One
Allulose tastes like table sugar, has almost no calories, and the FDA lets it off the sugar line entirely. Here's what the human trials actually show for blood sugar, appetite, and body fat, plus the gut and bone caveats nobody puts on the label.
Jul 13, 2026 -
Ingredient ScienceBerberine, Honestly: What the Evidence Says About Blood Sugar, Cravings, and "Nature's Ozempic"
Berberine is the yellow alkaloid the internet keeps calling nature's Ozempic. Here's what the human trials actually show for blood sugar and cravings, the absorption problem nobody mentions, and where the hype outruns the data.
Jul 9, 2026 -
Ingredient ScienceThe Science of Glucomannan: What Konjac Fiber Really Does for Hunger
Glucomannan is the fiber behind half the 'feel full, eat less' supplements and those squeaky zero-calorie noodles. Here's what the human trials actually show, where the hype outruns the data, and the one safety rule you can't skip.
Jul 8, 2026 -
GLP-1 ScienceIs a 'Natural GLP-1 Booster' a Real Thing? Native GLP-1 vs. the Drugs
Your own GLP-1 lasts about 2 minutes before your body chops it up. The injectable drugs are engineered to last a week. Here's the honest read on what 'boosting your own GLP-1' can and can't do about that gap.
Jul 7, 2026 -
Craving ToolkitCaffeine for Craving Control: The Cheapest Tool, and Its Hidden Costs
Caffeine is the appetite suppressant you already own. It can take the edge off daytime hunger for pennies, but its effect on sleep makes it the wrong tool for the late-night cravings that trip most people up. Here's the evidence, and the timing that matters.
Jul 6, 2026 -
Nutrition TrendsIs Fiber the Next Protein? The Hype vs. the Reality
Fiber is having a protein moment: front-of-box claims, fiber water, TikTok trends. Some of it is riding real science, a lot of it is borrowed hype. Here's how to tell them apart.
Jul 4, 2026 -
Supplement Safety5-HTP and Saffron for Cravings: The Serotonin Risk If You're on an SSRI
Two of the trendiest "natural" appetite ingredients both nudge serotonin. If you take an SSRI or SNRI, that overlap is worth understanding before you add either one.
Jul 2, 2026 -
Do "Natural GLP-1" Supplements Actually Work?
What "natural GLP-1" supplements really are, how the main ingredients (butyrate, prebiotic fiber, bitter compounds, probiotics) claim to work, and how to read the evidence.
Jun 30, 2026 -
When to Take a Craving Supplement — and Why Caffeine Fails After Dinner
Most snacking happens in the evening, which is exactly when caffeine-based suppressants stop being an option. Here is how timing should drive your pick.
Jun 30, 2026 -
Cheap vs. Capable: How We Rate Value in Craving Supplements
Our Value Index explained — efficacy per dollar, why "best value" is not "best product," and the Metamucil-vs-Ozzi worked example.
Jun 30, 2026 -
Snack ScienceThe Low-Sugar Candy Trap: Why ‘Healthier’ High-Fiber Gummies Are Wrecking Stomachs
Trader Joe’s sugar-free gummies sent shoppers running to the bathroom. The real reason isn’t the sweetener — it’s a big hit of fiber, plus sugar alcohols like erythritol. Here’s what’s going on, in plain English.
Jun 30, 2026