Dietary supplements are far less strictly regulated before they reach the market than prescription medications — the FDA does not review or approve them for safety and efficacy before they're sold. That doesn't mean every supplement is risky, but it does mean the burden of due diligence sits more with you, the buyer. Here's a short checklist worth working through before trying something new.
Could it interact with medication you take?
Botanical ingredients can interact with prescription medications, sometimes in ways that aren't obvious. Blood-flow-related ingredients (like L-Arginine) can be relevant if you take blood pressure medication or nitrates, for example. If you take any prescription medication or manage an ongoing health condition, showing your doctor or pharmacist the full ingredient list before starting is the single most useful step you can take.
Does it contain anything you're allergic or sensitive to?
Check both the main ingredient list and the "other ingredients" section for allergens, gelatin/gum sources (relevant for gummies), or anything you personally avoid. Labels are required to disclose major allergens, but it's still worth reading closely rather than assuming.
Does it contain caffeine or other stimulants?
Some energy- and circulation-support ingredients (like green tea extract) carry a small amount of naturally occurring caffeine. It's usually a modest amount, but if you're sensitive to caffeine, already consume other caffeinated products daily, or are avoiding stimulants for a specific reason, check for this explicitly rather than assuming a product is stimulant-free.
How transparent is the brand about manufacturing?
Look for clear information about where and how the product is made — ideally a specific claim like manufacturing in a GMP-certified, FDA-registered facility, alongside a full, legible Supplement Facts label rather than vague marketing claims. Our guide to reading a supplement label walks through exactly what to look for.
Does it disclose individual ingredient amounts, or only a blend total?
Neither approach is inherently unsafe, but if you want to compare a product's dosing against published research, you need individual amounts — a proprietary blend total won't give you that. See our botanical ingredients guide for context on what's typically studied.
What's the return or guarantee policy?
A specific, clearly stated money-back guarantee (with a defined time window and process) is a reasonable signal that a brand stands behind its product. Vague or missing return information is worth treating as a caution flag.
Where are you buying it from?
Counterfeit and knockoff versions of popular supplements are a real problem, particularly on third-party marketplaces. Buying directly from the brand's official checkout — rather than an unverified third-party listing — is the most reliable way to make sure you're getting the actual product and that any guarantee applies.
The bottom line
None of these questions require special expertise — they're really just due diligence, the same kind you'd apply before any other purchase that goes into your body. Running through this checklist takes a few minutes and meaningfully lowers the odds of an unpleasant surprise, whether that's an interaction, an allergen, or simply a product that doesn't stand behind what it sells.