Data from designated brain regions from the cFOS 3D brain imaging study were analysed using one-way ANOVA with Dunnets post hoc multiple-comparison test relative to the vehicle, using a negative binomial generalized linear model to control for Gaussian distribution
Short answer: no FDA-approved commercial pen exists today

I didnt see it on list: INGREDIENTS: WATER (AQUA), HYDROGENATED POLYDECENE, MINERAL OIL (PARAFFINUM LIQUIDUM), GLYCERIN, PETROLATUM, BUTYLENE GLYCOL, PARAFFIN, POLYGLYCERYL-2 DIISOSTEARATE, SQUALANE, GLYCERYL OLEATE, SODIUM GLUTAMATE, SODIUM PCA, DIPROPYLENE GLYCOL, BEESWAX (CERA ALBA), MICROCRYSTALLINE WAX (CERA MICROCRISTALLINA), POLYETHYLENE, METHYLPARABEN, PHYTOSTERYL/OCTYLDODECYL LAUROYL GLUTAMATE, FRAGRANCE (PARFUM), TRISODIUM EDTA, TOCOPHERYL ACETATE, ALCOHOL, TOCOPHEROL, IRON OXIDES (CI 77492), BUTYLPHENYL METHYLPROPIONAL, SAPINDUS MUKUROSSI PEEL EXTRACT (SAPINDUS MUKUROSSI), LIMONENE, LINALOOL, CITRONELLOL, ALPHA-ISOMETHYL IONONE, GERANIOL, UNCARIA GAMBIR EXTRACT (UNCARIA GAMBIR), BENZYL BENZOATE, HEXYL CINNAMAL, SANGUISORBA OFFICINALIS ROOT EXTRACT, SODIUM ACETYLATED HYALURONATE, HYDROXYPROLINE, IRON OXIDES (CI 77491), CHLORELLA VULGARIS EXTRACT, BHT 9.30.20 Christine said: Looks ok for pregnancy 10.4.20 J said: hi is below products safe for pregnancy

The peptides unique structural featurethe -glutamyl linkage between glutamic acid and cysteineprovides resistance to degradation by conventional peptidases
S., Soo, K