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Description
Not necessarily higher doses, but older users often respond particularly well because their baseline GHK levels are lower

Only after 90 days will all the pre-existing red blood cells have expired, and be replaced by healthy ones

Some uncommon side effects that could occur are some weakness, nausea, bowel problems, dizziness, lethargy, weight loss, thirst, nervous irritability, itchy skin, frequent urination, high levels of calcium

Some people may also feel like their entire body is swollen, notes MedlinePlus
