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Success depends on: Molecular size: Smaller peptides ( 3000 Da): TB-500 (4963 Da) - too large Growth hormone (22,000 Da) - way too large IGF-1 (7649 Da) - too large These require injection Most healing peptides: BPC-157 : Questionable nasal (injection or oral better) TB-500: Definitely injection only Most tissue repair peptides designed for injection Growth hormone secretagogues: Ipamorelin : Injection only CJC-1295 : Injection only GH peptides not designed for nasal Bioavailability too low nasally Weight loss peptides: Semaglutide : Injection only (or oral tablet form exists) Tirzepatide : Injection only These require subcutaneous delivery Rule of thumb: If the peptide is commonly injected by everyone probably needs injection If nasal spray versions are popular nasal likely works When in doubt injection more reliable How to properly use nasal spray peptides Technique makes or breaks results

Doctor's Best Astaxanthin (6mg) Best low dose Photo by Innerbody Research Pros Provides a 6mg dose shown in studies to improve skin moisture and elasticity Contains AstaReal, a clinically validated astaxanthin extract featured in multiple human studies Vegan softgels made without artificial colors or preservatives Third-party tested and produced in cGMP-certified U.S

Topical effects are usually mild and local: redness, tingling, dryness, or transient irritation, more common above 4% concentration

Glutathione levels decrease with age, resulting in age spots, dull complexion, and wrinkles

Preclinical studies Age-related declining NAD + levels in aging have been observed in rodents and different human tissues, such as muscle, liver, and brain 58,240,241

While results can vary, many patients at Seattle Plastic Surgery report positive effects after their treatments