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Prior to its production by recombinant DNA technology, growth hormone used to treat deficiencies was extracted from the pituitary glands of cadavers
Also, watch out for: Severe or persistent side effects : If side effects are unbearable or last longer than expected
NHS Guidance and Availability in the UK B12 injections on the NHS are available when clinically indicated for confirmed vitamin B12 deficiency
Any discussion of biological activity refers solely to laboratory, in vitro, or preclinical research
While naturopathic doctors wouldnt prescribe B12 for most people without a lab-confirmed deficiency, studies show that B12 injections may improve endurance in athletes
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