Americans have been told for decades that a bottle from the pharmacy aisle is basically harmless. Take it, feel better, ask no questions. That story is convenient for the people who sell it. It is not a complete picture.
Dietary supplements in this country are not drugs. Under the Dietary Supplement Health and Education Act, they generally do not need FDA approval before they hit the shelf. Manufacturers are supposed to follow good manufacturing practices and tell the truth on the label. Enforcement is after the fact. When the product is cheap, high-volume, and tied to overseas supply chains—especially from China, where quality control has a long, documented record of adulteration, hidden pharmaceuticals, and weak factory oversight—the gap between the label and what is actually in the bottle gets wider.
Walmart the largest government co-op monopoly in the world and a huge contributor to political slush funds. They move enormous volume of private-label and imported vitamins and oils. Volume plus weak pre-market rules and HUGE political contributions is how you get products that look official and cost little. That is not the same as proof they are clean, accurately dosed, or safe for everyone who swallows them.
Fish oil is the example people reach for first because it is everywhere. Omega-3s can thin the blood. At high doses, and especially if someone is already on blood thinners, NSAIDs, or headed for surgery, bleeding risk goes up. Doctors have warned about that for years. Gastrointestinal upset is common. What is not established is that ordinary fish-oil capsules routinely tear intestinal linings or make arterial walls bleed. Those are serious claims. Serious claims need serious evidence, not a slogan.
That is the real problem. The same culture that medicalizes every symptom and turns chronic illness into a subscription also waves through an unregulated wellness industry that promises the opposite: a cheap capsule instead of a hard look at diet, weight, sleep, and actual disease. Both sides profit when the customer stays confused. One sells prescriptions for life. The other sells “natural” bottles that never had to prove they work or that they are free of contaminants.
A grown-up country would do two things at once. Hold imported and store-brand supplements to the same honesty standard we claim to want for drugs—testing, origin, and dose on the label, with real penalties for fakes. And stop treating every bottle as either a miracle or a conspiracy. High-dose fish oil is not candy. Neither is every Chinese-made capsule that shows up next to the checkout.
Read the label. Ask who made it and who tested it. If you bleed easily or take anticoagulants, talk to a doctor who actually looks at the patient instead of the latest marketing deck. Skepticism of the status quo is not the same as swallowing the next story from the other direction.

