TeamIs Selank better as a nasal spray or a subcutaneous vial?

Short version: nasal Selank is the format most often discussed because it is convenient and matches much of the compound's historical intranasal research context. A lyophilized vial gives buyers more control over concentration and may make the price per milligram easier to compare, but that does not prove subcutaneous Selank works better. There is no solid head-to-head human trial establishing one route as the winner for calm, focus, or cognitive effects. For a useful buying comparison, check four things: 1. Exact identity. The label and COA should name Selank, not Semax, a blend, or an unexplained modified version. 2. Measurable amount. A spray should state total milligrams in the bottle, bottle volume, and metered sprays. For example, 10 mg in 10 mL is 1 mg/mL, but the amount per spray still depends on the pump output. A vial should state total milligrams per vial. 3. Lot-matched proof. Look for a COA tied to the exact batch, from a named independent lab, with identity and purity results. Purity percentage alone does not confirm the labeled net content. 4. Effective price. Divide the after-code price by the total labeled milligrams. A $50 bottle containing 10 mg is $5/mg. Then compare convenience, shipping, and testing quality rather than sticker price alone. Nasal products also deserve extra scrutiny around preservatives, bottle design, concentration, and whether the seller explains storage after opening. Vials add reconstitution and handling steps, so the cheapest $/mg is not automatically the best fit. PeptidePub's Selank comparison guide covers the buying distinctions: https://www.peptidepub.com/blog/semax-vs-selank-buyer-guide. You can also compare vendors and their testing transparency at https://www.peptidepub.com/vendors.