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2. Blue John (mineral) - Wikipedia

   en.wikipedia.org/wiki/Blue_John_(mineral)

   Blue, unbanded fluorite occurs in many localities around the world. Within the UK, blue fluorspars are also found in County Durham, especially Weardale. [1]: 39 Elsewhere, blue fluorspar is known in the Ardennes region of Belgium; the Cave-in-Rock area of Illinois in the United States; [1]: 39 and at various localities in Mexico and China.

3. Fluorite - Wikipedia

   en.wikipedia.org/wiki/Fluorite

   Fluorite has a uniquely high transparency at this wavelength. Fluorite objective lenses are manufactured by the larger microscope firms (Nikon, Olympus, Carl Zeiss and Leica). Their transparence to ultraviolet light enables them to be used for fluorescence microscopy. [40] The fluorite also serves to correct optical aberrations in these lenses.

4. The Best Supplements for Men Over 50, According to ... - AOL

   www.aol.com/best-supplements-men-over-50...

   While men are less likely to develop osteoporosis, it is possible and has been occurring more often in recent years in men over age 65. “Most men should aim for 1,000 - 1,200mg of calcium per ...

5. Biological aspects of fluorine - Wikipedia

   en.wikipedia.org/wiki/Biological_aspects_of_fluorine

   The Occupational Safety and Health Administration (OSHA) has set the legal limit (Permissible exposure limit) for fluorine exposure in the workplace as 0.1 ppm (0.2 mg/m 3) over an 8-hour workday. The National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit (REL) of 0.1 ppm (0.2 mg/m 3) over an 8-hour ...

6. 5 symptoms men over 40 should never ignore - AOL

   www.aol.com/finance/5-symptoms-men-over-40...

   One study found that men with moderate-to-high levels of exhaustion had a 2.7-fold increased risk of heart attack within five years and a 2.25 higher risk within ten years. The study also found a ...

7. Fluoride - Wikipedia

   en.wikipedia.org/wiki/Fluoride

   AIs are typically matched to actual average consumption, with the assumption that there appears to be a need, and that need is met by what people consume. The current AI for women 19 years and older is 3.0 mg/day (includes pregnancy and lactation). The AI for men is 4.0 mg/day. The AI for children ages 1–18 increases from 0.7 to 3.0 mg/day.

8. Opposition to water fluoridation - Wikipedia

   en.wikipedia.org/wiki/Opposition_to_water...

   Controversies include disputes over fluoridation's benefits and the strength of the evidence basis for these benefits, the difficulty of identifying harms, legal issues over whether water fluoride is a medicine, and the ethics of mass intervention. [20] The first large fluoridation controversy occurred in Wisconsin in 1950.

9. 4 Banana Benefits for Men, From the Bed to Your Blood Sugar - AOL

   www.aol.com/4-banana-benefits-men-bed-115700092.html

   We’ll explore various banana benefits for men. Find out if eating bananas can improve issues like ED and low drive and whether there’s any research to back up these claims. 4 Banana Benefits ...