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Symptoms of vitamin B12 deficiency include: fatigue, irritability, anxiety, low energy, depression, forgetfulness, constipation, new food sensitivities, hot and cold flashes, sore muscles, pale skin, numbness, tingling, and dermatitis

Brcic et al., 2009)

Three factors are especially critical for the KLOW blend because they specifically affect GHK-Cu: protect the copper peptide from light to avoid photo-oxidation, keep the pH in the optimal range of about 5.0 to 6.5 and avoid pH extremes, and minimize freeze-thaw cycles, as these favor aggregation and oxidation

The result can be low potassium, or hypokalaemia, in the first days of treatment