Buying a supplement shouldn't require a degree in chemistry, but knowing what to look for can make a huge difference. After years of working with dietary supplements and studying integrative health, I've learned that the front of the bottle is rarely where I start.
Here are five things I look at before deciding whether a supplement deserves a place in my routine.
- The Supplement Facts Panel:
The first thing I do is turn the bottle around. Marketing claims on the front may tell you what a company wants you to notice, but the Supplement Facts panel tells you much more about what you're actually getting.
I look at the serving size, the amount of each dietary ingredient per serving, and how the ingredients are identified. With botanicals, for example, I look for the botanical identity and the plant part used—information required as part of dietary supplement labeling. If an ingredient is standardized to a particular constituent, I want to know that too.
I also pay attention to whether meaningful amounts are disclosed. Proprietary blends can make this more difficult because they may list the ingredients in a blend without telling you the individual amounts of each.
My rule: Don't judge a supplement by the claims on the front of the bottle. Turn it around and read what is actually in it.
- The Actual Form of the Ingredients.
The ingredient name alone doesn’t always tell the whole story. The form of an ingredient can matter because different forms may vary in how they’re absorbed, tolerated, or used by the body.
Magnesium is a good example. A label that simply makes you think “this contains magnesium” doesn’t tell you everything I want to know. Magnesium glycinate, citrate, and oxide are different forms, and they don’t necessarily behave the same way in the body.
The same principle can apply to vitamins, minerals, botanicals, enzymes, and other ingredients. I want to know exactly what form I’m getting rather than choosing a product based solely on the ingredient name printed prominently on the front.
My rule: Look beyond what ingredient is included and ask what form of that ingredient you're actually buying.
- Other Ingredients.
The active ingredients aren't the only part of a supplement I look at. I also read the “Other Ingredients” section to see what was used to manufacture the finished product.
Depending on the dosage form, you may see capsule materials, flow agents, fillers, binders, coatings, flavors, sweeteners, colors, or other ingredients that serve a manufacturing purpose. Their presence doesn't automatically make a supplement bad, but I want to know they're there—and I prefer a product that uses only what is reasonably necessary.
This is also an important section to check if you're trying to avoid a particular ingredient because of an allergy, sensitivity, dietary preference, or personal choice.
My rule: Read the entire label—not just the ingredients being advertised on the front.
- Quality and Manufacturing.
A great-looking label doesn't tell me what happened behind the scenes. I also want to know something about the company responsible for making the product and the quality systems behind it.
Companies that manufacture, package, label, or hold dietary supplements are subject to FDA current Good Manufacturing Practice (cGMP) requirements under 21 CFR Part 111. But I still look for additional signs that a company takes quality seriously, such as appropriate ingredient and finished-product testing, supplier qualification, traceability, and meaningful third-party certifications or audits.
I’m also cautious about treating a logo on a bottle as proof that a product is automatically “high quality.” Certifications and testing claims mean different things, so I want to understand what was actually evaluated rather than simply counting badges on the label.
My rule: A supplement is more than its formula. I want confidence in the quality systems behind the finished product, too.
- Whether the Formula Actually Makes Sense.
A long ingredient list doesn't automatically make a supplement better. Sometimes the opposite can be true. I want to understand why the ingredients are together, whether the amounts make sense, and whether the formula appears designed around a clear purpose rather than simply packing as many popular ingredients as possible into one product.
This is especially important with multi-ingredient formulas. A product might advertise several impressive ingredients, but if they're included in amounts that don't make sense for the intended use, the impressive-looking label may not mean much.
I also consider whether I actually need everything in the formula. More isn't always better, and a complicated supplement isn't automatically superior to a thoughtfully designed, simpler one.
My rule: Don't count ingredients. Evaluate the formula.
The Bottom Line
Choosing a supplement shouldn't come down to which bottle has the best marketing. I look past the front label and evaluate what's actually in the product, the forms and amounts of the ingredients, what else was used to make it, the quality systems behind it, and whether the overall formula makes sense.
No single one of these factors tells the entire story. Taken together, though, they can help you become a much more informed supplement consumer.
That's exactly what I want to help people do through Primal Hacking: understand supplements well enough to make smarter decisions about what they put in their bodies.