The No-BS Guide to Weight Loss Supplements: What 40+ Bottles Taught a Portland Label-Snob

Forty-Plus Weight Loss Supplements Later, Here's the Checklist I Actually Trust

A bottle that lists "Proprietary Blend" as one line item can legally bury six or seven separate ingredients behind a single milligram number. That fact is the entire reason this guide exists. After testing more than forty weight loss supplements — most of them bought at Zupan's Markets on West Burnside, which fits neatly into a Portland lifestyle built around reading every label obsessively — I settled on four things worth checking before any bottle earns real ingredient transparency credit, plus a good reason to stop trusting supplement reviews that don't show their math.

The exact mechanics of how a proprietary blend legally dodges disclosure rules deserve their own deep dive, and I've already written that one elsewhere, so I won't repeat the full argument here. For this checklist, it's enough to know that big promises paired with zero individual numbers should end the conversation on its own.

None of the four criteria below require a chemistry background, which is a relief, since I fell asleep in college chemistry more than once. They require reading past the marketing language and into the actual supplement facts panel most people skip entirely. That pile of empty bottles, what I've started calling the supplement graveyard, is proof that most of my early mistakes came from trusting the front of a label instead of the back.

Does the Label Show Milligrams, or Just a Cool Name?

Dosage transparency is the first filter, and it's non-negotiable. Reading a proprietary blend is a lot like being handed a recipe card that just says "seasonings" instead of naming the spices. You have no idea if you're getting cumin or cinnamon, and the same logic applies to a fat burner claiming a mystery mix of herbs.

Mitch Adeyemi, someone I first argued with on a supplement forum long before he passed through Portland for work, put it better than I ever have. He won't touch anything with a celebrity's name attached to it, on principle, and after enough bottles I've come around to his side of that argument. If a product needs a famous face to sell it instead of a dosage number, that's the tell.

The second filter is whether herbal extracts list a standardization percentage — a defined share of the active compound — instead of just a plant name on its own. That habit traces back to years spent drinking traditional remedies while traveling through Southeast Asia, though that part of the story belongs on its own page rather than this one. A full line-by-line teardown of one specific label lives elsewhere too, since that kind of deep dive doesn't fit inside a general checklist.

Checking Caffeine and Fillers Before Anything Else Matters

Caffeine content comes right after dosage transparency on the list. Some "natural" fat burners pack in as much caffeine as three cups of coffee without saying so anywhere on the front of the bottle, and that's how people end up wired at midnight wondering why sleep won't come.

A generic bottle of Hydroxycut is the clearest example I've got — enough stimulant to make my hands shake within the hour, with no per-ingredient breakdown anywhere to explain why. Not a great way to spend an afternoon. One thermogenic fat burner built on a proprietary blend went further and sent my heart rate high enough that I sat on the edge of my bed for twenty minutes just waiting for it to settle. Neither bottle earns a place back on the shelf, no matter how many five-star reviews it has.

Staying sharp through a long afternoon meeting with zero coffee in my system tells me more about whether a product works than any bathroom scale does. Fillers matter too — magnesium stearate and titanium dioxide show up constantly, and their presence is usually a sign a company is bulking out capsules instead of paying for active ingredients.

Third-Party Testing Beats Any Marketing Claim

Third-party testing is the filter that catches everything else. Sites that verify whether what's on the label is actually in the pill matter more than any five-star review section, since a company can write whatever it wants on a bottle with zero consequences.

At my desk in the Pearl District, I keep a small kitchen scale within reach for exactly this reason. When a label claims a serving is one scoop, I weigh the scoop instead of trusting the marketing copy, and more than once the actual weight has come in noticeably lighter than what the serving-size math implied.

Sumit Bhattacharya, a guy from an online group where a few of us compare notes on supplement testing, told me flatly that he's never once made an exception for a proprietary blend, no matter how convincing the marketing looked. I used to think that was a little extreme. After enough disappointing bottles, I don't anymore.

One label finally broke my Portland supplement curse by disclosing every single milligram up front, and I wrote about why a specific high-end label finally broke my Portland supplement curse in more detail elsewhere. The actual cost-per-serving math is a separate exercise worth doing before you buy anything, though I won't rerun those numbers here.

Where the Real Homework Continues

Gut health plays a bigger role in appetite and cravings than most supplement marketing ever admits, and the specific microbiome connection is a topic detailed enough that it needed its own full write-up rather than a paragraph here. That's part of why I've been looking at clean probiotics for weight loss that skip the proprietary blend problem entirely. Meal-replacement smoothie protocols raise a similar set of questions and deserve their own full comparison rather than a footnote in a general checklist.

Run any bottle through the four filters above (dosage numbers, standardized extracts, caffeine and filler content, third-party verification), and most of the marketing noise falls away on its own. A high price tag proves nothing by itself, and neither does a low one. The label either shows its work or it doesn't, and that single distinction has saved me more money than any discount code ever has.