La Huasteca

I have found Vitamin D2, and D3, and regular D. The D2 and D3 appear to be "irradiated" and that kinda scares me. Also how much should an adult 25-35 years old, male or female take daily?

The recommended daily Upper Limit for vitamin D is 10,000 IU, however, safety studies indicate that up to 40,000 IU may be safe for most people. If you wish to take more than one daily serving of this product, you should check with your physician.

I would recommend Isotonix Vitamin D with K2
http://www.marketamerica.com/lcbeauty/product-13324/isotonix-vitamin-d-with_k2.htm#

Each serving contain 5,000 IU of Vitamin D3 & 45 mcg of Vitmain K2.

Vitamin D3 is used because it’s the metabolically active form of vitamin D, along with vitamin K2, a form of vitamin K which supports vascular health and calcium utilization. Vitamin K2 is included because of its unique partnership with vitamin D. Vitamins K and D work together to promote healthy calcium absorption and utilization. Vitamin K supports the delivery of calcium to the bones and helps maintain arterial health.

With Isotonix line, since it’s in isotonic form by adding certain amount of water to one capful of powder (it tastes great too!), vitamins won’t stay in stomach and will go to intestine within 5 minutes so you are looking for absorption rate of 90% and higher, higher absorption rate even compare to IV injection.

Not all supplements are made equally. Never look for price when selecting supplements, look for values and potency and absorption rate because our health is priceless!