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Age can affect how well the body absorbs and uses vitamin B12
This is not specific to B12 but reflects the sensitivity of the gastrointestinal tract in these conditions
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What your body does with them is not
Drop in milk production associated with debility & weakness
In conjunction with B12, these amino acids work to pump up your natural metabolic rate, meaning your body becomes more proficient in turning food into energy that you can use all without storing more than you need, meaning its more difficult to gain weight
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