Piling on moisturiser every night and still waking up to skin that feels papery and tight is more common than people think, and doctors say the reason often sits deeper than a skincare routine or the season outside. Sometimes what looks like ordinary dryness is actually the skin reacting to a shortage of specific nutrients, not enough water intake, or a weakened outer barrier that lets moisture escape faster than any cream can replace it. That said, dry skin alone is not proof of any single deficiency, and it should not be self-diagnosed.
When Vitamin A runs low
Vitamin A sits high on the list of nutrients skin depends on for normal repair and texture, and a shortfall can leave the surface rough and flaky no matter how much cream is applied. Foods such as carrots, sweet potatoes, spinach, other leafy greens, eggs and dairy products are natural ways to keep intake adequate. Doctors caution against picking up Vitamin A supplements without medical advice, since taking too much of it can do just as much harm as taking too little.
A hidden Vitamin D shortfall
Vitamin D plays a role in several body functions, and researchers have also linked it to skin health. Anyone suspecting their levels are low can only confirm it through a blood test ordered by a doctor rather than by guessing from symptoms. If a deficiency is confirmed, supplementation should still be taken only under medical supervision rather than picked up independently.
Fatty acids that guard the skin barrier
Certain essential fatty acids come only from food, and they help keep the skin's outer layer, referred to as the skin barrier, functioning properly. Walnuts, flaxseeds, chia seeds and certain fish are useful additions to a diet aimed at supporting this. Eating healthy fats in a balanced amount is generally considered beneficial for the skin as well.
What iron deficiency can do
A shortage of iron can trigger a range of problems in the body, and in some people it also shows up as changes in skin tone and overall skin condition. Doctors advise getting checked if dry skin is accompanied by ongoing tiredness, weakness or spells of dizziness, rather than assuming it will pass on its own.
Sometimes it has nothing to do with vitamins
Not every case of persistent dryness traces back to a vitamin or mineral shortfall. Simply not drinking enough water can leave skin feeling parched. Bathing in very hot water, washing with soap too frequently, using harsh scrubs and even low humidity in the air can all damage the skin barrier and undo whatever a moisturiser is trying to do.
