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2. B vitamins - Wikipedia

   en.wikipedia.org/wiki/B_vitamins

   The elderly and athletes may need to supplement their intake of B 12 and other B vitamins due to problems in absorption and increased needs for energy production. [ medical citation needed ] In cases of severe deficiency, B vitamins, especially B 12 , may also be delivered by injection to reverse deficiencies.

3. Here’s What You Need to Know About B-Complex Vitamins - AOL

   www.aol.com/know-b-complex-vitamins-184200741.html

   It’s made up of eight smaller vitamins: thiamine (vitamin B1), riboflavin (vitamin B2), niacin (vitamin B3), pantothenic acid (vitamin B5), pyridoxine (vitamin B6), biotin, folic acid, and ...

4. Vitamin B12 deficiency - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12_deficiency

   Furthermore, ≈ 14–16% of adults and > 20% of elderly individuals showed evidence of marginal vitamin B 12 depletion (serum vitamin B 12: 148–221 pmol/L). [ 157 ] [ 158 ] In the United Kingdom , a National Diet and Nutrition Survey (NDNS) was conducted in adults aged between 19 and 64 years in 2000–2001 [ 159 ] and in elderly individuals ...

5. Vitamin B12 - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12

   Vitamin B 12 is derived from a tetrapyrrolic structural framework created by the enzymes deaminase and cosynthetase which transform aminolevulinic acid via porphobilinogen and hydroxymethylbilane to uroporphyrinogen III. The latter is the first macrocyclic intermediate common to heme, chlorophyll, siroheme and B 12 itself.

6. Nutrition and cognition - Wikipedia

   en.wikipedia.org/wiki/Nutrition_and_cognition

   The complex consists of: thiamine (B 1), riboflavin (B 2), niacin (B 3), pantothenic acid (B 5), pyridoxin (B 6), folic acid (B 9), cobalamin (B 12), and biotin. [18] B vitamins are not synthesized in the body, and thus need to be obtained from food. B-complex vitamins are water-soluble vitamins, which means that they are not stored within the ...

7. The best skin care routine for your 60s, according to ... - AOL

   www.aol.com/lifestyle/best-skin-care-routine-for...

   Ingredients: Hyaluronic acid, retinoids, niacinamide and other B vitamins, vitamin C, and peptides are hydrating, plumping and skin-rejuvenating ingredients to look for as you rethink your ...