The first two signs of vitamin A deficiency are typically night blindness (difficulty seeing in low light) and dry eyes (xerophthalmia), which can progress to reduced tear production, irritation, and eventually more severe eye issues like Bitot's spots or corneal damage, notes healthdirect.gov.au and clevelandclinic.org. These vision-related symptoms appear early because Vitamin A is crucial for the retina and tear film.
Night blindness is one of the first signs of vitamin A deficiency. In its more severe forms, vitamin A deficiency contributes to blindness by making the cornea very dry, thus damaging the retina and cornea.
Because of the teratogenic effects secondary to excessive vitamin A intake, the WHO recommends as safe during pregnancy a maximum dose of up to 10,000 IU daily or 25,000 IU weekly after the first 60 days of gestation [10,12,38].
A lack of vitamin A or calcium can be the reason for itchy skin. To determine whether you are deficient in these nutrients, it is advisable to consult with a healthcare professional. They can evaluate your symptoms alongside test results to recommend the appropriate treatment and dosage.
Your eye also needs vitamin A to nourish other parts of your eye, including the cornea. Without enough vitamin A, your eyes cannot produce enough moisture to keep them properly lubricated. Vitamin A deficiency is the leading cause of preventable blindness in children worldwide.
Vitamin A. Vitamin A, also known as retinol, produces the pigments in the retina of the eyes. More importantly, it is a vital nutrient for the photoreceptors in your eyes, which determine vision quality in low-light conditions.
Some studies have also linked riboflavin deficiencies to ophthalmological findings such as blurred vision. Most recently a study by Zhao et al, in 2022 reported on the possible association between riboflavin deficiencies and night-time blindness.
The results suggest that vitamin D supplementation, especially in its D3 form, may significantly reduce the severity of chronic pruritus.
Vitamin deficiencies: Deficiencies in certain vitamins such as B12 and D may lead to problems with the joints, including crepitus or popping joints. A calcium deficiency can also cause cracking bones. Poor calcium intake can lead to decreased bone density. This could make your joints more likely to pop.
What other conditions can cause itchy skin?
Also, an excessive intake of vitamin A, defined as more than 10,000 IU of vitamin A per day, may be associated with fetal malformations of the bones, urinary tract or nervous system. As a result, women should not take additional vitamin A supplementation outside of what's in their prenatal vitamin.
You can also get vitamin A by including good sources of beta-carotene in your diet, as the body can convert this into retinol. The main food sources of beta-carotene are: yellow, red and green (leafy) vegetables, such as spinach, carrots, sweet potatoes and red peppers. yellow fruit, such as mango, papaya and apricots.
Possible interactions include:
Changes in vision are often the first noticeable sign of vitamin A deficiency. You may notice that you cannot see as well as night. For example, it may be harder to drive at night, you may not be able to easily find your way to the bathroom, or you may notice that you need to turn on lights earlier in the evening.
Blood tests or urinalysis are the main way to diagnose vitamin deficiencies. Healthcare providers, especially primary care providers, may recommend these tests based on symptoms you have. Routine blood work during an annual checkup or physical exam can also catch many deficiencies before you have symptoms.
Additional cutaneous effects include dry skin, pruritus, peeling of the palms and soles, and fissuring of the fingertips. Higher doses of vitamin A may lead to telogen effluvium. Severe cases may manifest with bone pain and increased intracranial pressure.
People need vitamin B-12 for the brain to work well. If not treated, vitamin B-12 deficiency can lead to issues with the nerves, brain or spinal cord. These might include lasting tingling in the hands and feet or trouble with balance.
The Role of Vitamin D
Furthermore, some research suggests that vitamin D deficiency may be linked to an increased risk and severity of osteoarthritis, a common cause of joint pain. Ensuring adequate vitamin D levels through sunlight exposure, diet, or supplementation can be a crucial step in managing joint discomfort.
A lack of vitamin B3 can lead to pellagra, which manifests as dry and cracked heels. Vitamin B3, a water-soluble B-complex vitamin, plays a role in converting food into energy and helps the body utilize protein and fats to maintain healthy skin, hair, and a strong nervous system.
Oat Milk. Oat milk is currently enjoying a moment in the sun as a dairy-free, soy-free, and environmentally friendly alternative to milk. But, it can also be good for your skin. As anyone with naturally dry, eczema-prone skin knows, oats have natural calming and soothing properties.
Because of this, some of the best foods to eat when you have skin issues include natural sources of probiotics, like:
Examples include dry skin (xerosis), eczema (dermatitis), psoriasis, scabies, parasites, burns, scars, insect bites and hives. Internal diseases. Itching on the whole body might be a symptom of an underlying illness, such as liver disease, kidney disease, anemia, diabetes, thyroid problems and certain cancers.
It's fixable. The best thing about B12 deficiency? It's one of the most treatable causes of memory loss, fatigue and brain fog – once you know what you're dealing with. If you're feeling more tired than usual, struggling to concentrate, or just not feeling like yourself, it's worth speaking to your GP.
Cloudy vision can also be a result of changes in or damage to the cornea, (the clear bit at the front of your eye) including infections or inflammations. Less common conditions that may contribute to cloudy vision include: diabetes, optic nerve disease and macular degeneration.
A lack of B12 damages the myelin sheath that surrounds and protect nerves. Without this protection, nerves cease to function properly and conditions such as peripheral neuropathy occur. Even B12 deficiency that is relatively mild may affect the nervous system and the proper functioning of the brain.