When someone mentions vitamin D they really are not talking about a
single thing. Vitamin D is a family of compounds originally composed of: D1, D2
and D3. Over the years it became clear that D1 wasn’t actually a single thing,
but a mix of different reagents, so, at the moment only D2 and 3 exist
D2 and D3 are very similar and in essence they have the same function in the human body. Manly, vitamin D is needed for calcium (Ca+2) to be absorbed to the bones and for it to be retained for long periods of time (prevents loss of calcium), without this vitamin the bones would become weaker over time.
Specific Functions of Vitamin D
Maintenance of bone strength
Regulation of blood levels of calcium and phosphorus
Prevention of cancer (specially in postmenopausal women)
D2 or D3: Which is better?
As we mentioned before, D2 and D3 belong to the vitamin D family. They
have many similarities, in fact, many sources don’t even make a distinction
between these chemicals, but they have differences that may be important if you
are planning to take vitamin D supplements.
Vitamin D2 is called ergocalciferol
while D3 is cholecalciferol
D2 is found only in plants while D3 is only found in animals
Humans get a great part of the D3 they need not from their diet but from
the sun. When human skin is exposed to sunlight it produces D3 naturally
D3 is 3 times more potent than D2 and therefore is preferred for medical
The effects caused by D3 last longer
WARNING: D3 is recommended as a supplement for people with vit D deficiency, but it should not be taken without medical supervision or if you suffer from an allergy to D3, problems with the absorption of nutrients or have abnormally high blood levels of calcium. Pregnant women and people with a heart or kidney condition should also avoid this vitamin.
Among the possible side effects we have:
Shortness of breath
Signs of overdose: arrhythmia, loss of appetite, body pain, stiffness and confusion.
Sources of Vitamin D3
This vitamin can be dangerous in excess and should not be ingested in the form of supplements unless a specialist (like a nutritionist) recommends it. If you want to keep yourself healthy and have normal levels of vitamin D3, try expose your skin to the sun with regularity and follow a healthy diet including fish. For regular checkup and appointment bookings you can always contact us.