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Almost 200 years later in 1885, Paul Ehrlich observed that the trypan blue dye, when given in the blood circulation in rats, stained only peripheral organs not the brain and spinal cord [1, 2]

There are exceptions, but for hair growth, oral peptide products generally do not produce the same clinical response as topical-plus-microneedling or injectable protocols

Persistent side effects are not typical and may indicate individual sensitivity, peptide quality issues , or unrelated causes

however, there are many factors to consider when evaluating the use of any product for inflammation or autoimmune disease

Medical monitoring is still recommended