#293
Three posts ago, I shared how my B12 had dropped and my physician suggested a once-a-day chewable. That's how I officially joined the supplement club, though I wasn't quite sure what this club was all about, so naturally I went digging.
Supplements are basically vitamins, minerals, protein, herbs and other extras packed into pills, powders and gummies. They came about soon after scientists figured out how to make vitamins in a lab, and by the 1940s, multivitamins were already sitting on pharmacy shelves, with convenience doing the rest since popping a capsule felt way easier than planning a balanced plate. Then in 1994, a US law called DSHEA (Dietary Supplement Health and Education Act) allowed supplements to be sold without FDA approval, which means the maker is responsible for safety and the FDA usually steps in only after something goes wrong. No wonder the supplement aisle is so crowded with bold promises.
So who actually needs them? My college course on nutrition is pretty clear on this: food first, and then supplements only to fill real gaps for specific people like:
- Vegans, e.g. for B12. That's me.
- Women who are or could become pregnant, for folic acid. Folate intake needs to jump by about 50% in pregnancy, and the baby's brain and spine form in the first few weeks, often before a woman even knows she's pregnant. Plus, the body absorbs folic acid from pills and fortified foods better than dietary folate.
- Older adults, who make less stomach acid and absorb less B12 from food.
- People with little sun exposure, for vitamin D.
- Anyone with a deficiency confirmed by a blood test.
And who has no need for supplements? Most healthy people eating a varied diet on a regular basis. In such cases, supplements provide extras the body doesn’t need, and those extras can easily backfire: fat-soluble vitamins pile up, iron turns toxic, and too much folate can hide a B12 deficiency while nerve damage quietly carries on.
Labels need a careful eye too. A 500 milligram calcium gluconate tablet may hold only 45 milligrams of actual calcium, and some pills barely even dissolve. My textbook suggests a fun little test: drop one in a glass of vinegar, and if it hasn't broken apart in about half an hour, it probably won't in your gut either.
Then there's the multivitamin, the most popular pill on the shelf, which for most healthy people works as a modest safety net at best. My own multi has B12 in it, and my levels still dropped. A multi is built to maintain normal levels, not to fix a deficiency. Hence the separate chewable.
And feeling tired doesn't automatically mean you need iron either, so test, don't guess.
What no supplement can fully cover is phytochemicals. These are natural compounds plants make to defend themselves against sun, pests, and disease, and they give fruits, vegetables, herbs, and spices their color, smell, and bite. They're not vitamins or minerals, so skipping them won't cause a deficiency disease. Scientists have identified thousands, studied only a fraction, and many more haven't even been discovered yet. You can't bottle what you haven't found. A few examples:
- Lycopene makes tomatoes red. It belongs to the carotenoid family, cousin to the beta-carotene in carrots. Cooking tomatoes with a little oil makes more of it available.
- Anthocyanins paint berries, purple cabbage and black grapes.
- Curcumin turns turmeric golden. Black pepper helps the body absorb it. Indian "haldi doodh" with pepper wasn't a happy coincidence, after all!
- Allicin gives crushed garlic its punch. It forms when garlic is chopped or crushed, so letting it sit a few minutes before cooking helps.
- Sulforaphane comes from broccoli, cabbage, and their cruciferous cousins. It nudges the body’s own defense enzymes into action and is being studied for its role in cancer prevention.
Researchers are studying phytochemicals for protecting cells, calming inflammation, and more. That's also where supplements trip up. In large trials, beta-carotene pills raised the risk of lung cancer in smokers, while people who ate beta-carotene-rich fruits and vegetables did fine. Pull a compound out of its plant and it doesn't always behave the same way. Food comes as a team. Fiber, vitamins, minerals, and thousands of phytochemicals working together in ways science is still untangling.
These days I read nutrition labels on foods and supplements the way I read a lease agreement. Slowly, and with far more respect for the fine print.