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Becky · 01-09-2008, 04:11 PM

There are 2 forms of vitamin D. They are D2 (ergocalciferol) and D3 (cholecalciferol).. D2 is a synthetic form and D3 is a natural form (and this is also the form the skin produces when exposed to light). Since D3 is the form the body makes, it has to go through fewer gyrations to make the next intermediate in the liver. However, both D2 and D3 get transformed in the liver to this same intermediate. However, sometimes the D2 route is not as efficient as the D3 route. After that, this intermediate gets transformed once again (this time in the kidney) to the hormone we finally use. As we age, the liver and kidney aren’t as efficient at the job. It is always better to use D3 as it is easier for the body to use but D2 works too.

01-09-2008, 04:11 PM	#2
Becky Senior Member Join Date: Sep 2005 Location: Stockton, NJ Posts: 4,179	There are 2 forms of vitamin D. They are D2 (ergocalciferol) and D3 (cholecalciferol).. D2 is a synthetic form and D3 is a natural form (and this is also the form the skin produces when exposed to light). Since D3 is the form the body makes, it has to go through fewer gyrations to make the next intermediate in the liver. However, both D2 and D3 get transformed in the liver to this same intermediate. However, sometimes the D2 route is not as efficient as the D3 route. After that, this intermediate gets transformed once again (this time in the kidney) to the hormone we finally use. As we age, the liver and kidney aren’t as efficient at the job. It is always better to use D3 as it is easier for the body to use but D2 works too. __________________ Kind regards Becky Found lump via BSE Diagnosed 8/04 at age 45 1.9cm tumor, ER+PR-, Her2 3+(rt side) 2 micromets to sentinel node Stage 2A left 3mm DCIS - low grade ER+PR+Her2 neg lumpectomies 9/7/04 4DD AC followed by 4 DD taxol Used Leukine instead of Neulasta 35 rads on right side only 4/05 started Tamoxifen Started Herceptin 4 months after last Taxol due to trial results and 2005 ASCO meeting & recommendations Oophorectomy 8/05 Started Arimidex 9/05 Finished Herceptin (16 months) 9/06 Arimidex Only Prolia every 6 months for osteopenia NED 18 years! Said Christopher Robin to Pooh: "You must remember this: You're braver than you believe and stronger than you seem and smarter than you think"