If you’ve been feeling more tired than usual lately, or you’ve noticed that you’re forgetting little things — where you put your keys, what you walked into a room for — you might be tempted to chalk it up to “just getting older.” But here’s something worth knowing: for millions of women over 60, those symptoms aren’t simply aging. They’re a warning sign that your body may be running low on one of the most critical nutrients for brain health.
That nutrient is Vitamin B12.
B12 deficiency is remarkably common in women over 60 — and it’s one of the most frequently missed diagnoses. Your body needs B12 to make red blood cells, keep your nervous system functioning properly, and — critically — protect your brain. When levels drop too low, the effects can be wide-ranging and serious.
Here are six signs that your B12 may be dangerously low — and what you can do about it.
1. You’re Forgetting Things More Than Usual
This is perhaps the most important sign to pay attention to. B12 plays a direct role in the production of myelin — the protective sheath that surrounds your nerve cells and keeps signals moving quickly and clearly through your brain.
When B12 is low, myelin production slows. And when that happens, your memory starts to suffer. You might notice you’re struggling to recall names, losing track of conversations, or feeling a persistent “brain fog” that makes it hard to think clearly.
The good news? Unlike age-related cognitive decline, B12-related memory problems are often reversible when caught early.
2. You Feel Exhausted No Matter How Much You Sleep
B12 is essential for producing red blood cells, which carry oxygen throughout your body. When your levels drop, your body can’t make enough healthy red blood cells — a condition called megaloblastic anemia. The result is a deep, bone-level fatigue that no amount of rest seems to fix.
If you’re waking up tired, hitting a wall by mid-afternoon, or feeling wiped out after activities that never used to bother you, your B12 levels are worth checking.
3. You Have Tingling or Numbness in Your Hands and Feet
Pins and needles in your extremities — especially when they seem to come and go for no clear reason — can be a neurological signal of B12 deficiency. Because B12 is critical for nerve health, low levels can cause damage to the peripheral nervous system, leading to that uncomfortable tingling sensation.
Don’t dismiss this one. Nerve damage from B12 deficiency can become permanent if left untreated for too long.
4. You’ve Been Feeling Down or More Anxious Than Usual
B12 is involved in producing serotonin and dopamine — the “feel good” chemicals in your brain. When your levels are low, mood can take a real hit. Women with B12 deficiency often experience increased feelings of sadness, irritability, or anxiety.
If you’ve noticed a change in your mood that doesn’t seem tied to anything specific going on in your life, it’s worth asking your doctor to check your B12 levels alongside any other testing.
5. Your Tongue Looks Smooth or Feels Sore
This one surprises a lot of people. A healthy tongue has tiny bumps called papillae on its surface. With severe B12 deficiency, those bumps can disappear, leaving the tongue looking unusually smooth and feeling inflamed or sore — a condition called glossitis.
You might also notice mouth ulcers or a burning sensation. If you’ve been experiencing unexplained mouth discomfort, add this to your list of questions for your next doctor visit.
6. You Feel Unsteady on Your Feet
Balance problems and difficulty walking steadily can be a sign of neurological damage caused by prolonged B12 deficiency. The nerves responsible for coordinating movement can be affected, which is why some people describe feeling wobbly or unsteady, particularly in low-light conditions.
For older women, balance issues also raise fall risk — making this a particularly important symptom to take seriously.
Why Women Over 60 Are Especially at Risk
As we age, the stomach produces less hydrochloric acid — and that acid is what helps your body absorb B12 from the food you eat. This means that even if you’re eating plenty of meat, fish, eggs, and dairy (the main food sources of B12), your body may simply not be absorbing enough of it.
Certain medications also interfere with B12 absorption — including metformin (commonly prescribed for blood sugar) and proton pump inhibitors (for acid reflux). If you take either of these regularly, it’s especially important to have your B12 levels monitored.
What to Do If You Recognize These Signs
First, don’t panic — B12 deficiency is very treatable. Here’s where to start:
- Talk to your doctor and ask for a simple blood test to check your B12 levels.
- Ask about supplementation — B12 supplements (especially sublingual forms that dissolve under the tongue) are well-absorbed even when stomach acid is low.
- In more severe cases, your doctor may recommend B12 injections that bypass the digestive system entirely.
- Focus on B12-rich foods: salmon, tuna, beef, eggs, and fortified cereals.
The bottom line: many of the symptoms we accept as inevitable parts of aging — fatigue, forgetfulness, low mood — may actually be your body waving a flag. A simple blood test could be the first step toward feeling like yourself again.
If you recognized yourself in any of these six signs, please bring them up at your next appointment. Your brain — and your body — will thank you.