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MHRA Borderline Guidance MHRA guidance updated on 2 July 2026 explains that classification can consider pharmacological properties, explicit and implied claims, intended purpose, packaging, websites, social-media content and customer reviews
Critical Reviews in Clinical Laboratory Sciences
Pills support gradual improvement
Theres no one-size-fits-all
Can digestive problems affect how well my body absorbs B12
There is no identified upper limit for B12 as it's a water-soluble nutrient, meaning any excess is removed in urine
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