Start conservatively and adjust based on results
These points come from official label language and vial-handling guidance, not from casual forum summaries
While aging is the most common cause of hair turning gray, there are other factors that can contribute to premature graying, meaning those that start to see gray in their 20s and 30s, says GH Beauty Lab Director Sabina Wizemann

Other ingredients Purified (deionized) water, aloe barbadensis (aloe vera) leaf gel, vegetable glycerin, prunus amygdalus dulcis (sweet almond) oil, extra virgin cocos nucifera (coconut) oil, simmondsia chinensis (jojoba) seed oil, glyceryl stearate, cetyl alcohol, stearic acid, beeswax, theobroma cacao (cocoa) seed butter, setria glutathione [as l-glutathione (oxidized)], phenoxyethanol, d-panthenol (vitamin b-5), allantoin, vitamin e (as d-alpha tocopheryl acetate), soy lecithin, potassium hydroxide, xanthan gum, origanum vulgare (oregano) leaf extract, thymus vulgaris (thyme) leaf extract, cinnamomum zeylanicum (cinnamon) bark extract, rosmarinus officinalis (rosemary) leaf extract, lavandula angustifolia (lavender) flower extract, citrus medica limonum (lemon) peel extract, mentha piperita (peppermint) leaf extract, olea europaea (olive) leaf extract