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The medicines regulator is investigating whether UK clinics are breaking the law by making claims about the benefits of unregulated, experimental peptide therapies, the Guardian can reveal

H.Al-HarbiB.Al-SayedA.ArafahM.TulbahA.JarmanA.et al (2019)

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By doing so, you avoid relying on one type of strategy that might only perform well under specific market conditions

People with asthma or other allergies

While oral capsules and nasal sprays exist in commercial markets, there is virtually no clinical data in the published literature to prove they survive digestion long enough to mimic the effects observed in the injectable studies