The Nutrient Deficiencies You Don't Know You Have: Common Gaps in Women's Diets

Nutrient deficiencies in women in the UK are far more common than most of us realise — and the quietly unsettling part is how easy they are to miss. Fatigue that feels like just life. Hair that seems a little thinner than it used to. A low-grade restlessness that sits beneath the surface. These aren't always signs of stress or burnout. Sometimes, they're your body asking for something it's simply not getting enough of.

Modern diets are abundant in calories but often surprisingly sparse in the nutrients that keep women feeling genuinely well. Here's a closer look at the gaps that tend to go unnoticed — and what you can do about them.

Why Women Are Particularly Vulnerable to Nutrient Gaps

Women's nutritional needs shift throughout life — with menstruation, pregnancy, perimenopause, and menopause each placing different demands on the body. What was enough at 25 may not be sufficient at 40. Add in busy lifestyles, food restriction, or a heavily processed diet, and the gaps can quietly widen.

The challenge is that many deficiencies don't announce themselves dramatically. They settle in slowly, often dismissed as normal tiredness or ageing. Which is exactly why it's worth paying attention.

The Most Common Nutrient Deficiencies in UK Women

Iron

Iron deficiency is the most widespread nutritional deficiency globally, and UK women are particularly affected. Monthly blood loss through menstruation is the most common cause, but low dietary intake plays a significant role too — especially in women following plant-based diets, where iron from food sources is less readily absorbed by the body.

Signs to notice: persistent tiredness, pallor, difficulty concentrating, feeling cold more often than usual. If you suspect low iron, a simple GP blood test can confirm it.

Vitamin D

The UK's grey skies aren't just a mood consideration — they have a real impact on vitamin D levels. The NHS recommends that everyone in the UK consider supplementing vitamin D from October through to March, when sunlight is insufficient for the skin to synthesise it naturally.

Low vitamin D is linked to feelings of low mood, fatigue, and reduced immune resilience. Many women are surprised to discover their levels are below optimal, even after a summer of reasonable sunshine.

Magnesium

Magnesium is involved in over 300 biochemical processes in the body — from muscle function and energy production to supporting a calm, steady nervous system. Yet studies consistently show that a significant portion of adults don't meet the recommended daily intake through food alone.

The signs of low magnesium can be subtle: disrupted sleep, muscle tension, a sense of edginess that doesn't quite go away. Chronic stress also depletes magnesium stores, creating a quietly draining cycle. Both Drift Deeper and Quiet Mind contain magnesium, chosen specifically to support the body's natural ability to wind down and find its rhythm again.

Vitamin B3 (Niacin)

B vitamins are the quiet workhorses of energy metabolism, and B3 — niacin — is no exception. It contributes to normal energy-yielding metabolism and plays a role in maintaining healthy skin. Women eating restrictive diets, or those who are highly active, may find their B vitamin levels running low without realising it.

That familiar feeling of being tired but wired — running on empty but unable to properly rest — is one that many women describe. It's worth considering whether nutritional support might be part of the picture.

Vitamin C

Despite being one of the most well-known vitamins, deficiency is still more common than expected — particularly in women with high stress loads, since the body uses vitamin C at a faster rate when under pressure. It contributes to normal immune function and plays a key role in collagen synthesis, which supports skin, joints, and connective tissue.

Diets low in fresh fruit and vegetables — which is easier to fall into during busy seasons of life than we like to admit — can leave levels lower than they should be.

Biotin

Biotin, a B-group vitamin, is often associated with hair and nail health — and with good reason. It contributes to the maintenance of normal hair and normal nails, and a deficiency (though less common than others on this list) can show up as brittle nails or hair that feels weaker or more prone to breakage.

Women who have been pregnant, or who have been on certain medications for extended periods, may be more prone to lower biotin levels.

Vitamin A

Vitamin A contributes to the normal function of the immune system and plays an important role in skin health. It's a fat-soluble vitamin, meaning it needs dietary fat to be absorbed properly — something that can be compromised in very low-fat diets. Signs of insufficiency can include dry skin, increased susceptibility to illness, and changes in night vision.

How to Know If You're Affected

The most reliable way to understand your nutrient status is through a blood test with your GP or a private health screen. Many of the deficiencies listed here can be identified through standard blood panels, and knowing your numbers gives you a much clearer, more intelligent starting point than guesswork.

That said, there are reasonable questions worth sitting with. Do you feel consistently tired despite sleeping? Is your hair or skin changing in ways you can't explain? Are you noticing low mood, difficulty concentrating, or a sense of being less resilient than usual? These aren't complaints to brush aside — they're worth exploring.

Filling the Gaps With Intention

Food should always come first. A diet rich in leafy greens, quality protein, whole grains, healthy fats, and plenty of colour will naturally support better nutrient levels across the board. But the reality of modern life — stress, time pressure, dietary preferences, age-related changes in absorption — means that gaps can persist even with a generally balanced diet.

Supplementation, approached thoughtfully and grounded in your actual needs, can help bridge that space. Not as a shortcut, but as a quiet act of support for a body that works hard every single day.

Rooted Human's range is built on that principle — evidence-based ingredients, chosen with care, designed to support the areas where women most commonly need a little more. Because feeling well isn't a luxury. It's what you deserve as your baseline.

Photo by Annemarie Grudën on Unsplash