“My nails keep breaking no matter how careful I am.”
Many people blame frequent handwashing, nail polish, or ageing when their nails become brittle. Because it seems like a small cosmetic issue, it is often ignored or covered up with nail treatments and supplements.
But persistently weak nails may occasionally reflect something deeper than external damage.
From a dietitian’s perspective, nail health can reflect overall nutritional status. Nails require a continuous supply of nutrients to grow and repair properly. When nutrient intake or absorption becomes insufficient over time, subtle changes may begin appearing in fast-growing tissues like nails before more obvious health issues develop.
One commonly overlooked factor is LOW iron stores.
Iron supports oxygen delivery throughout the body, including to the nail-forming cells. When iron availability becomes insufficient, nails may become thinner, softer, or more prone to peeling and breakage. Some people may also notice slower nail growth, hair thinning, lower energy levels, or nails that lose their usual strength over time.
Iron vs Ferritin — Why Both Matter
Low iron status is not always obvious in the early stages. Ferritin reflects the body’s stored iron reserves.
When dietary iron intake becomes insufficient, iron losses increase, or absorption is poor over time, ferritin levels may gradually decline before haemoglobin is affected.
During this stage, the body may still appear “normal” on routine screening, but rapidly growing tissues like nails can already begin showing subtle changes.
This is because nail-producing cells require adequate oxygen and nutrients to support continuous growth. When iron availability becomes insufficient over time, nail structure and strength may gradually become affected, leading to thinning, peeling, or increased breakage.
3 Habits Your Nails May Be Begging You to Fix
1. Relying on “Convenient Eating” Too Often
Busy lifestyles often lead to irregular meals, convenience foods, or meals that are filling but nutritionally unbalanced.
Over time, diets lacking sufficient protein, iron, and micronutrients may affect how well the body maintains growing tissues like nails. This is especially common during prolonged dieting, stressful periods, or highly restrictive eating patterns.
2. Focusing Only on Iron Intake — But Not Iron Absorption
Some people regularly consume iron-containing foods but still struggle with low iron stores because absorption matters too.
Certain habits may reduce how effectively the body absorbs iron, including drinking tea or coffee immediately after meals. On the other hand, pairing iron-rich meals with vitamin C-rich foods like guava, oranges, or tomatoes may help improve absorption.
For individuals relying mainly on plant-based iron sources, meal combinations become even more important because plant iron is naturally harder for the body to absorb.
3. Depending on Supplements Without Addressing the Root Cause
Collagen, biotin, and nail supplements are increasingly popular, but supplements alone may not improve nail health if underlying nutritional gaps are still present.
For example, if overall dietary intake remains low in protein or iron, the body may still struggle to build healthy nail tissue despite supplementation. In some cases, low ferritin levels, rather than lack of “beauty supplements”, may be the real issue behind persistent brittle nails.
Supplements work best when they support proper nutrition foundations, not replace them.
When Should You Pay Attention?
Occasional nail breakage is common. However, nails that remain persistently brittle, peel frequently, or break easily over time may deserve further attention, especially when accompanied by fatigue, hair thinning, or low energy levels.
If you notice your nails becoming persistently brittle or prone to breakage, speak to a healthcare professional about assessing your iron status, including ferritin levels.
Author: Dietitian Khoo Wei Jin, Alpro Pharmacy Professional Care and Development
