Extremely concentrated solutions (over ~5 mg/mL for most therapeutic peptides) can hit solubility limits and remain cloudy
That being said, safety depends on individual health factors, dosing, and medical supervision
You should NOT undergo microneedling if you: Additionally, microneedling has not been formally evaluated in patients with certain conditions, including active acne, rosacea, eczema, psoriasis, diabetes, active infections, keloid scarring, or those on blood thinners or immunosuppressive therapy
And while supplements help, B12 injections deliver faster, more reliable results that many of my clients say they can feel within days
Scott RD et al