How often do you scroll past photos of long, thick, healthy-looking hair and wonder why yours doesn't look like that? Maybe you've tried every new hair product out there, expensive and drugstore, and nothing seems to change.
Sometimes the answer isn't on your shelf at all. It's inside. Being low in certain vitamins and minerals can show up in your hair, and it's one of the first things I'd want you to rule out with your doctor. Here's what you should know.
Why nutrition shows up in your hair
Your scalp has around 100,000 hair follicles, and like every other part of your body, they rely on the nutrients your blood carries. When you're low in something your body needs, hair is one of the places it can show.
Hair isn't essential for survival, so when resources are short, your body sends them to your heart, brain and organs first. That's why shedding can be an early sign that something is off.
Which nutrient deficiencies are linked to hair loss?
These are the ones that come up most often:
- Iron: low iron is one of the most common nutritional causes of shedding, especially in women. Iron helps red blood cells carry oxygen through your body.
- Protein: hair is made mostly of keratin, a protein. Not eating enough protein, especially during crash diets, can lead to shedding.
- Vitamin D: low vitamin D has been linked to hair loss.
- Zinc: hair loss is one of the signs of a zinc deficiency.
- Biotin (vitamin B7): a biotin deficiency is rare, but it can cause thinning hair and brittle nails.
- Vitamin B12: helps your body make red blood cells, and low B12 is worth checking if you're shedding, especially if you don't eat animal products.
- Vitamin C: an antioxidant that also helps your body absorb iron from plant foods.
- Vitamin A: your body needs it for cell growth, but balance matters. Too much vitamin A can actually be linked to hair loss.
- Selenium: an essential trace mineral, but here too, more isn't better. According to the National Institutes of Health, getting too much selenium can cause hair loss.
That last part is important: with some of these, taking too much can cause problems too. That's why I always say test, don't guess.
What causes vitamin deficiencies?
A few common reasons:
- Diet: not eating enough, not eating a variety of foods, or cutting out entire food groups.
- Blood loss: heavy periods, illness or injury can lead to low iron.
- Digestive conditions: things like inflammatory bowel disease or celiac disease can make it harder to absorb nutrients.
- Medications: some medications, including certain acid-blocking drugs, can affect how you absorb nutrients like B12.
- Smoking: can affect how your body uses certain nutrients.
- Too much alcohol: can affect how your body absorbs and stores vitamins and minerals.
- Health conditions: some conditions, like cystic fibrosis, can lead to deficiencies in vitamins A, D, E and K.
A balanced diet is the foundation, but sometimes other factors get in the way, and that's when a doctor's help matters.
Premature Hair Graying
Graying is mostly genetic. That said, low levels of some nutrients, like vitamin B12, have been linked to early graying in some people. If you're going gray much earlier than the people in your family, it's worth mentioning to your doctor.
Stress, vitamins and hair loss
Stress can trigger shedding, a type called telogen effluvium. And when you're stressed, it's easy to skip meals, sleep badly and eat less variety, which can stack nutritional gaps on top of the stress itself.
So if you're shedding during a stressful season, look at both: how you're managing stress, and whether you're actually eating well.
Final Thoughts
Hair loss is personal, and there are a lot of possible causes. If you think a deficiency might be part of it, the best first step is simple: ask your doctor for a blood test. Iron, ferritin, vitamin D, B12, zinc and thyroid levels are a good place to start.
From there, eat a balanced diet, take care of yourself, and only supplement what you actually need. Many of our customers also love adding Goldie Locks® Hair Supplements to their daily routine.
