Many people end up with a cupboard full of half-used bottles bought after reading one article or seeing one ad. A better approach is to start from what you actually need and build a short routine around it. Here is how, in six steps.
Step 1: Start with food and a few basic questions
Supplements fill gaps. They do not replace a balanced diet, sleep and exercise. Before buying anything, ask yourself:
- Do I eat fish, meat, dairy and eggs, or do I avoid some of them?
- Am I over 50, pregnant, or planning a pregnancy?
- Do I get much sun?
- Do I take any regular medicines?
- Do I train hard, especially with weights?
Your answers point to the gaps that matter most. For example, vegans often need B12, people who rarely eat fish may consider omega-3s, and anyone who could become pregnant should take folic acid. Our list of supplements with the strongest evidence explains who each one helps.
Step 2: Get tested before guessing
For some nutrients, guessing is a bad idea. A simple blood test can tell you whether you are low in vitamin D, B12 or iron. Iron in particular should not be taken without a reason, because too much is harmful. Bring a list of what you take, or plan to take, to your next checkup. Our list of questions to ask your doctor about supplements can help.
Step 3: Check for interactions
Some supplements change how medicines work. St. John's wort weakens many medicines, including birth control. Vitamin K affects blood thinners. Calcium and iron can block the absorption of thyroid medicine and some antibiotics. Read our guide on supplement and drug interactions and ask your pharmacist if you are unsure.
Step 4: Keep it short
Most people need zero to three supplements, not ten. A short routine is cheaper, easier to stick with and less likely to cause interactions or double up on the same nutrient. Watch for overlap: a multivitamin, a "hair, skin and nails" product and a separate zinc pill can add up to more zinc than you need.
Step 5: Buy smart
- Compare cost per serving, not price per bottle. Our guide to calculating cost per serving shows how.
- Choose the right form. Some forms are absorbed better or are gentler on the stomach. Each of our ingredient pages, like magnesium, compares the forms.
- Look for third-party testing from groups such as USP or NSF. See what third-party tested means.
- Pick the format you will actually take. Powders are usually cheapest, while gummies cost more and often contain sugar. Compare formats in capsules vs powders vs gummies.
More money-saving tips are in how to save money on supplements.
Step 6: Make it a habit
- Tie it to something you already do, such as breakfast or brushing your teeth.
- Check food timing. Vitamin D, omega-3s and other fat-soluble nutrients absorb better with a meal. Iron absorbs best on an empty stomach but can upset it. See how to take supplements with or without food.
- Use a weekly pill organizer if you take more than one thing.
- Store them properly, away from heat and humidity. The bathroom is usually the worst spot. Read how to store supplements.
Review your routine twice a year
Your needs change with age, diet, pregnancy, new medicines and the seasons. Every six months, ask whether each supplement still has a clear reason to be there. If you cannot remember why you started taking something, it may be time to stop.
A sample routine
Here is what a simple routine might look like for a healthy 55-year-old who eats little fish and lifts weights twice a week:
- Breakfast: vitamin D3 (if a blood test shows low levels) and vitamin B12.
- After training: creatine monohydrate, 3 to 5 grams, mixed into a drink. See how to take creatine.
- Dinner: an omega-3 supplement with food.
Your routine will look different. The point is that every item has a clear reason, a sensible dose and a set time of day.