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Q&A: Should I be taking vitamin/mineral supplements?

12/19/2021

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If you’ve ever wondered, “Should I take a supplement for this?” this is the post for you. We’ll walk through a decision-making tool to help you figure out when you should take a vitamin/mineral supplement, and when you probably shouldn’t (or simply don't need to).

Let’s note up front that I’ll be speaking generally in this post, because there’s no way we could cover everything in one blog. I’m also specifically talking about vitamin and mineral supplements here; some of this can be generalized to other categories of supplements, but not all of it.

And as always, I highly recommend talking to a doctor or dietitian about your specific history and concerns!
 
So – when should I take a supplement?
  • When your nutritional needs for a vitamin or mineral are higher than what is feasible for you to get from food alone.
It’s important to note here that what we know of recommended daily intakes of various nutrients are very general – for the average healthy population. There’s a lot we don’t know yet about exact nutritional needs of specific populations, and even within a specific group, each person’s nutrient needs may be higher or lower.
There’s a growing body of evidence that people with mental health issues specifically may have higher needs for various nutrients. As one small example, there are some connections between genetic B vitamin processing disorders and mood disorders, which means that some people with depression, bipolar disorder, and schizophrenia may need more or different forms of various B vitamins to meet their individual needs.
  • When you are deficient in a vitamin or mineral and you need to get levels up more quickly than you could feasibly do with food.
Some deficiencies and insufficiencies are hard to correct, can take a fair amount of time, or are more immediately detrimental to our health. Other times, it may take some time to change your diet to provide enough of a certain nutrient.
Often, when someone’s labs show a less-than-optimal level of a vitamin or mineral and they have substantial dietary changes to make, I’ll recommend a supplement temporarily and continue to monitor their intake of that nutrient until I feel they’ve reached a point where they are consistently getting enough from their diet alone.
  • When you’re taking a medication that depletes certain vitamins or minerals in your body.
Some medications cause our bodies to use up or excrete certain nutrients more quickly than usual, and while we’re taking them, we need to supplement those nutrients. A few common examples are supplementing vitamin B12 when you’re taking metformin, or supplementing potassium when you’re taking certain diuretics (water pills).

OK then, so when shouldn’t I take a supplement?
  • When you’re able to meet your nutritional needs from food alone.
Sometimes it’s just not necessary to take a supplement. If you’re eating a balanced diet with nutrient-dense foods, you are generally healthy, aren’t taking any nutrient-depleting medications, and don’t have any genetic or environmental needs for increased nutrient needs, then a supplement may just be wasted on you. Many vitamins are water-soluble, meaning that when you eat more than your body can use, you just pee out the extra.
  • When you’re on a limited budget.
In general, if you need to choose between quality food versus supplements, I would encourage you to choose the food almost every time. Food is going to be much more beneficial than supplements for almost everyone, regardless of age, gender, health conditions, etc. So when money is tight, every dollar that can go to buying quality and quantity nutrient-dense food (such as fruits, vegetables, legumes, nuts, seeds, etc.) rather than supplements is going to be a much better use of your funds.
 
In general (with some notable exceptions), the nutrients we make into supplements are contained in foods we could be and should be eating.

And typically, the packaging of those nutrients within a food are more “friendly” to our bodies because:
  • The way they exist in nature in combination with other nutrients often helps our bodies to absorb and use them both better (such as the combination of vitamin D and calcium in salmon).
  • The way we prepare and cook them often makes them more bioavailable (like a salad containing tomatoes, which are high in fat-soluble vitamin A, topped with an oil-based dressing).
  • In food form, these nutrients are very unlikely to lead to toxicity in our bodies. (Though the risk in general from vitamin and mineral supplements is quite low, there is still higher risk from supplements than from whole foods.)

I think there’s also an argument to be made that we just don’t know all the nutrients that are out there yet! We are constantly discovering new phytochemicals and nutraceuticals that turn out to be incredibly important for optimal health and disease prevention. We certainly don’t want to miss out on these nutrients by thinking that we can just take supplements and then we don’t have to eat our fruits and veggies.
 
The bottom line:
The main questions when deciding whether to take a supplement are:
  1. Can I meet my needs (for optimal health) for this supplement from food alone?
  2. Will taking this supplement affect my ability to afford nutritious whole foods?
  3. Have I had my labs checked recently to see whether my levels are high, low, or optimal?
These might be questions you want to take to a doctor or registered dietitian for more guidance on your personal situation and needs.
 
Interested to learn more? If you have any questions, feel free to comment below or message me directly. If you’d like more personalized guidance, schedule an appointment or a free 15-minute discovery call with me! I’d love to work with you.

Erica Golden, RDN, LD, IFNCP

Mental health, gut health, and eating disorder dietitian
@nourishedmindnutrition

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