This vitamin is crucial for bone growth, good vision and regulation of the immune system which helps ward off infections. Vitamin A promotes white blood cell production which helps to combat free radicals and bacteria in your child’s body.

Vitamin D3 is the best for plant growth. While vitamin D2 is also considered to be good, vitamin D3 helps with better absorption of calcium in the plant stems. It is especially important in vegetative propagation, in which roots are grown via cutting.

Water, air, light, soil nutrients, and the correct temperature for the right plants are the most basic factors to make a plant grow faster and bigger.

Vitamin A is a fat-soluble vitamin that is naturally present in many foods. Vitamin A is important for normal vision, the immune system, and reproduction. Vitamin A also helps the heart, lungs, kidneys, and other organs work properly.

The best sources of vitamin A are:

• Cod liver oil.
• Eggs.
• Fortified breakfast cereals.
• Fortified skim milk.
• Orange and yellow vegetables and fruits.
• Other sources of beta-carotene such as broccoli, spinach, and most dark green, leafy vegetables.

Since too much vitamin A can be harmful, consult with your doctor before taking vitamin A supplements. Vitamin A toxicity may cause symptoms, such as liver damage, vision disturbances, nausea and even death. High-dose vitamin A supplements should be avoided unless prescribed by your doctor.

The top food sources of vitamin A in the U.S. diet include dairy products, liver, fish, and fortified cereals; the top sources of provitamin A include carrots, broccoli, cantaloupe, and squash [4,5].

Vitamin A may prevent some types of cancer and acne. It may also help treat psoriasis. It’s also claimed to help treat dry or wrinkled skin. It may also protect against the effects of pollution and prevent respiratory tract infections.

Vitamin A helps to speed up healing, prevent breakouts and support the skin’s immune system and it promotes natural moisturising – which means it helps to hydrate the skin effectively, giving it a radiant glow. It assists in promoting and maintaining a healthy dermis and epidermis; the top two layers of your skin.

Too much vitamin A can be harmful. Even a single large dose — over 200,000 mcg — can cause: Nausea. Vomiting.

Vitamin A toxicity can be caused by ingesting high doses of vitamin A—acutely (usually accidentally by children) or chronically (eg, as megavitamin therapy or treatment for skin disorders). Acute toxicity causes rash, abdominal pain, increased intracranial pressure, and vomiting.

How much vitamin A is enough? Until 2001, the dietary reference intake for adult men was 5,000 international units (IU) a day, or 1,500 micrograms (mcg). Levels of up to 10,000 IU (3,000 mcg) have been considered safe.

As a general rule, consuming too much or over-supplementing vitamin A can cause hair loss [15, 16]. Typically, fat-soluble vitamin A is stored in the liver where its dispersal is tightly regulated by anabolic and catabolic reactions between the inactive and active metabolite.

The most effective way to treat this condition is to stop taking high-dose vitamin A supplements. Most people make a full recovery within a few weeks. Any complications that occurred from the excess vitamin A, such as kidney or liver damage, will be treated independently.

The liver stores vitamins and minerals for the times when they may be lacking in the diet. It can store enough vitamin A and vitamin B12 for four years, and enough vitamin D for four months. Vitamins are a group of organic compounds that act as catalysts in various chemical reactions.

Vitamin A is a fat-soluble vitamin that has several important functions in the body. It helps cells reproduce normally, a process called cellular differentiation. It is essential for good vision.

Most people with vitamin A toxicity have a headache and rash. Consuming too much vitamin A over a long period of time can cause coarse hair, partial loss of hair (including the eyebrows), cracked lips, and dry, rough skin. Chronic consumption of large doses of vitamin A can cause liver damage.

In summary, long-term supplementation with vitamin D3 in doses ranging from 5000 to 50,000 IUs/day appears to be safe.

Vitamin D (ergocalciferol-D2, cholecalciferol-D3, alfacalcidol) is a fat-soluble vitamin that helps your body absorb calcium and phosphorus. Having the right amount of vitamin D, calcium, and phosphorus is important for building and keeping strong bones.

Tell your doctor right away if any of these signs of high vitamin D/calcium levels occur: nausea/vomiting, constipation, loss of appetite, increased thirst, increased urination, mental/mood changes, unusual tiredness. A very serious allergic reaction to this drug is rare.

For vitamin D deficiency: 50,000 IU per week for 6-12 weeks has been used. However, some patients require higher doses for longer periods of time to maintain optimal blood levels of vitamin D. For preventing osteoporosis: 400-1000 IU/day of vitamin D in a form known as cholecalciferol has been used in older adults.

What are the side effects of Vitamin D3 (Cholecalciferol (Vitamin D3))?

• chest pain, feeling short of breath;
• growth problems (in a child taking cholecalciferol); or.
• early signs of vitamin D overdose–weakness, metallic taste in your mouth, weight loss, muscle or bone pain, constipation, nausea, and vomiting.