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Studies found that 40 to 59 per cent of B12 in meat, fish and cows milk is degraded during cooking (Rizzo et al., 2016
10.3390/biom13010184 188 Lpez-InceraA.NouvianM.RiedK.MllerT.BriegelH
Rarely reported symptoms associated with excessive B12 intake may include: Skin reactions : Acne-like eruptions or rosacea-type dermatitis have been occasionally reported, particularly with high-dose intramuscular injections Gastrointestinal disturbance : Mild nausea, diarrhoea, or abdominal discomfort, though these are uncommon Headache : Infrequent reports of headaches following parenteral B12 administration Hypersensitivity reactions : In very rare cases, allergic reactions to injectable B12 preparations have been documented It is crucial to note that there is no established link between standard B12 supplementation and serious adverse effects
10.3390/biomedicines9080992 153 KimJ.-Y.KimK.-H.LeeW.-R.AnH.-J.LeeS.-J.HanS.-M.et al (2015a)
A generic purity figure with no lot number is not testing
