Dietary supplements: what they are, when you need them and how to choose them correctly

What actually is a dietary supplement?

A food supplement is a food product intended to complement the regular diet and which is a concentrated source of nutrients (vitamins, minerals) or other substances with a nutritional/physiological effect (plants, extracts, fatty acids, probiotics), in measured doses - capsules, tablets, sachets, drops, etc. It is not a medicine, so it is not allowed to promise to treat or cure diseases.

Why do people take supplements?

According to EFSA and NIH recommendations, supplements can be useful in two major situations:

1. when you have an insufficient diet or a higher need (e.g. pregnant women – folate; elderly people – vitamin D; vegans – B12);

2. when a doctor/nutritionist recommended it to you for a specific problem.
They are not meant to "replace breakfast" nor to "fix" a messy lifestyle.

Types of supplements you see most often

1. Vitamins and minerals

Vitamin D, C, B complex, magnesium, iron. They are especially useful when there is a deficiency proven by tests or a risk context (winter, pregnancy, restrictive diet). The dosage should be close to the recommended daily allowance (RDA), not 5–10 times higher, unless the doctor says otherwise.

2. Plants and extracts

Ex.: ginseng, valerian, ginkgo, milk thistle. These have physiological effects, but also potential interactions with medications (e.g. ginkgo with anticoagulants). That's why it's a good idea to ask your doctor or pharmacist first.

3. Omega-3, probiotics, collagen

They are popular for heart, digestion, joints or skin. It is important to know the amount of active substance (e.g. EPA/DHA in omega-3) and whether there is evidence for the indication you are looking for.

4. All-in-one mixes

Be careful here: many use a “proprietary blend” and don’t list the exact amounts – making it impossible to know if you’re getting an effective dose or just marketing hype. If the quantities aren’t clear on the label, it’s a question mark.

How to choose a safe dietary supplement (checklist)

1. Look at the label

• Does it have a clear name for the active ingredient?
• Does it have a daily dose and recommended serving ?
• Does it have the warning "do not exceed recommended dosage"?
  That's required by EU law. If it's not there, I wouldn't buy it.

2. Look for doses close to the RDA

Very high doses do not necessarily mean better effect and can cause adverse effects (e.g. excess vitamin A in pregnant women, excess iron in men or people without deficiency). EFSA clearly states that manufacturers must fall within safe levels.

3. Check the manufacturer and notification

It is ideal to buy supplements from well-known companies, pharmacies or stores that can show the notification number to the Ministry of Health. The Ministry has a list of notifications on its website.

4. Beware of promises

If you see "cures diabetes", "lose 10 kg in 7 days", "replaces treatment" - it's not a serious supplement. In the EU, something like that is prohibited.

5. Ask if you are taking medication

Certain supplements may interact with anticoagulants, blood pressure medications, and immunosuppressants. The FDA and NIH recommend that you talk to your doctor/pharmacist before supplementing, especially if you have a chronic condition.

The risks of "by ear" consumption

• Overdose (especially of fat-soluble vitamins A, D, E, K).
• Drug interactions .
• Counterfeit or contaminated products , if purchased from sites that do not ask for anything.
• Delaying a real diagnosis – the person takes supplements “for fatigue”, but actually has anemia or thyroid.

Conclusion

Dietary supplements are not the enemy of health, but neither are they a "magic pill." They are designed to complement the diet, not take it out of the equation. To be safe and useful:

1. Choose products that are notified and labeled correctly (in Romanian).
2. Look for normal doses, not spectacular ones.
3. Check if you are in a group that really needs it.
4. Ask your doctor/pharmacist if you have any chronic illnesses or are taking any medications.
5. Don't believe the promises of "heal, treat, melt".

If you follow the steps above and read labels with a bit of a critical mind, supplements can be a good tool in your lifestyle – but not a substitute for a healthy diet and regular medical checkups.