Red meat, spinach, legumes and fortified cereals are among the most reliable dietary sources of iron. Pairing iron-rich plant foods with a source of vitamin C — such as a squeeze of lemon juice or a serving of bell peppers — significantly improves absorption, as non-haem iron from plants is less bioavailable than the haem iron found in animal products.
What your nails are telling you: reading the signs of nutritional gaps
Nails act as a long-term record of the body’s internal state. Because nail cells grow slowly — fingernails grow roughly 3mm per month — changes in texture, colour or shape often reflect nutritional conditions from weeks or even months prior, making them a useful but delayed indicator of dietary deficiencies.
Ridged nails can point to low iron or B-vitamin intake. Peeling or splitting nails are frequently associated with protein or biotin shortfalls. Pale nail beds may suggest anaemia, while white spots — though commonly blamed on calcium — are more often the result of minor physical trauma to the nail matrix.
Addressing these signs through diet is the most sustainable approach. However, when dietary changes alone do not produce improvement after several months, a blood panel can identify specific deficiencies and guide targeted supplementation. Self-diagnosing and taking high-dose supplements without confirmed deficiency carries its own risks, including nutrient imbalances and interactions with medications.
The source material covers three of the six nutrients listed in the original guide — protein, biotin and iron. The full framework also addresses additional micronutrients not detailed in the available excerpt. For readers whose nail changes persist despite dietary adjustments, the next step is a blood test to identify specific deficiencies, followed by a conversation with a healthcare provider about whether a targeted dietary supplement is appropriate. The question of which nutrient combinations produce the best results — and at what doses — remains an active area of nutrition research.
