// Skin · Ingredients · Peptides — L3 data
// Visual skeleton must match the Oily prototype exactly. Vary copy, never layout.

const OILY = {
  type: "Peptides",
  parent: { title: "Ingredients", href: "/en/skin/ingredients/" },
  grandparent: { title: "Skin", href: "/en/skin/" },
  totalCount: 97,
  hero: "https://images.unsplash.com/photo-1620916566398-39f1143ab7be?w=1800&q=80&auto=format&fit=crop",
  heroAlt: "Editorial close-up — lightweight serum dropper",
  h1: "How to use peptides.",
  deck: "Signal molecules, copper peptides, and the marketing problem. Peptides are real. Most of the claims made for them aren't. A plain-English guide to what's worth using.",
  intro: "Peptides are real. Short-chain amino acids that signal to fibroblasts, support barrier function, and in some cases deliver copper ions that have a role in collagen metabolism. The science is legitimate. The gap between the science and what's written on product packaging is where you'll lose an afternoon if you're not careful. Most peptide products are dosed too low to do much. A few are formulated well. The job of this library is to separate one from the other — and to give you a clear view of which peptides have the evidence behind them, what they actually do, and how they fit into a routine that's already working.",
  byline: "Edited by Nelly · Beauty & Style Director",
  meta: { count: 97, updated: "Updated 25 April 2026", reading: "Avg. 4 min per piece" },
};

// Ingredients sibling rail — 9 siblings under /en/skin/ingredients/
const TYPE_SIBLINGS = [
  { id: "niacinamide",             title: "Niacinamide",            n: "01", href: "/en/skin/ingredients/niacinamide/" },
  { id: "vitamin-c",               title: "Vitamin C",              n: "02", href: "/en/skin/ingredients/vitamin-c/" },
  { id: "retinoids",               title: "Retinoids",              n: "03", href: "/en/skin/ingredients/retinoids/" },
  { id: "chemical-exfoliants",     title: "Chemical Exfoliants",    n: "04", href: "/en/skin/ingredients/chemical-exfoliants/" },
  { id: "ceramides",               title: "Ceramides",              n: "05", href: "/en/skin/ingredients/ceramides/" },
  { id: "peptides",                title: "Peptides",               n: "06", cur: true, href: "/en/skin/ingredients/peptides/" },
  { id: "humectants-vs-emollients", title: "Humectants vs Emollients", n: "07", href: "/en/skin/ingredients/humectants-vs-emollients/" },
  { id: "the-brightening-pair",    title: "The Brightening Pair",   n: "08", href: "/en/skin/ingredients/the-brightening-pair/" },
  { id: "spf-filters",             title: "SPF Filters",            n: "09", href: "/en/skin/ingredients/spf-filters/" },
];

const QUICK_FACTS = {
  defn: {
    h: "What peptides are — and what they aren't",
    body: "Peptides are short chains of amino acids — the building blocks of proteins including collagen and elastin. In skincare, they work primarily as signalling molecules. Signal peptides communicate with fibroblasts and can upregulate collagen synthesis. Carrier peptides (copper peptides) deliver trace elements. Neurotransmitter-inhibiting peptides are the Botox-adjacent category that's heavily marketed and more lightly evidenced. The category is real. Most individual products oversell their particular peptides.",
  },
  myths: [
    { m: "All peptides work the same way.",
      t: "Signal peptides, carrier peptides, and neurotransmitter-inhibiting peptides do different things by different mechanisms. 'Peptide' on a label tells you almost nothing." },
    { m: "Peptides can replace retinoids.",
      t: "The evidence base for retinoids is orders of magnitude larger. Peptides are a useful addition to a retinoid routine. They're not a replacement." },
    { m: "A high peptide concentration means a better product.",
      t: "Peptide delivery is complex. Stability, penetration, and whether they're formulated with anything that disrupts their function matters as much as the amount." },
  ],
};

const BEGINNER_PATH = {
  h: "Start here, if peptides are new to you.",
  deck: "Five pieces, in order. Enough to navigate the category without being sold something that doesn't work.",
  steps: [
    { n: "01", t: "What peptides actually do in a skincare product",                  time: "4 min", note: "Signal, carrier, inhibiting — the three types." },
    { n: "02", t: "Copper peptides — the most evidence-backed category",              time: "4 min", note: "What copper peptides do, what to look for in a formulation." },
    { n: "03", t: "Reading peptide product claims honestly",                          time: "3 min", note: "The gap between ingredient science and product marketing." },
    { n: "04", t: "Where peptides fit in a routine",                                  time: "3 min", note: "After cleansing, before ceramides and oils. Stability considerations." },
    { n: "05", t: "Peptides with retinoids — a compatible pair",                      time: "4 min", note: "Why niacinamide and ceramides sit nearby. The layering logic." },
  ],
};

const TRENDING = [
  { rank: "01", t: "Copper peptides — what the evidence actually says", time: "5 min", auth: "Nelly", date: "Apr 23", img: "https://images.unsplash.com/photo-1620916566398-39f1143ab7be?w=1100&q=80&auto=format&fit=crop", reads: "9,882" },
  { rank: "02", t: "Signal peptides — how to find ones that work", time: "4 min", auth: "Iris",  date: "Apr 18", img: "https://images.unsplash.com/photo-1571875257727-256c39da42af?w=1100&q=80&auto=format&fit=crop", reads: "7,641" },
  { rank: "03", t: "The peptide marketing problem, explained", time: "4 min", auth: "Nelly", date: "Apr 13", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=1100&q=80&auto=format&fit=crop", reads: "6,219" },
  { rank: "04", t: "Can peptides replace retinoids", time: "4 min", auth: "Iris",  date: "Apr 08", img: "https://images.unsplash.com/photo-1598440947619-2c35fc9aa908?w=1100&q=80&auto=format&fit=crop", reads: "5,783" },
  { rank: "05", t: "Palmitoyl pentapeptide — the most studied signal peptide", time: "5 min", auth: "Nelly", date: "Apr 03", img: "https://images.unsplash.com/photo-1512290923902-8a9f81dc236c?w=1100&q=80&auto=format&fit=crop", reads: "4,904" },
];

const FORMAT_GUIDE = {
  h: "Format & cadence, by use case",
  deck: "Peptides by type and delivery format. Stability and formulation determine how much reaches the skin.",
  formats: [
    { name: "Copper peptide serum",      when: "PM, after cleansing, before moisturiser", avoid: "With very high-dose vitamin C (destabilising)", note: "GHK-Cu. Most studied carrier peptide. A legitimate addition to a PM routine.", verdict: "★ Best-evidenced" },
    { name: "Signal peptide serum",      when: "AM or PM, stable base formulation",       avoid: "Expecting retinoid-grade results",             note: "Palmitoyl tripeptide, pentapeptide. Signals fibroblasts. Slow and cumulative.", verdict: "Long game" },
    { name: "Peptide moisturiser",       when: "Daily, all skin types, AM or PM",          avoid: "As sole active treatment",                    note: "Low-concentration delivery. Reliable and undramatic. A gentle daily option.", verdict: "Low-intensity" },
    { name: "Peptide eye cream",         when: "PM, periorbital area",                    avoid: "Expecting wrinkle correction speed",           note: "Consistent use over months. Eye area is thin and receptive.", verdict: "Supplemental" },
    { name: "Neurotransmitter-inhibiting", when: "If trying the category, apply to expression lines", avoid: "Expecting topical Botox", note: "Argireline is the most common. Limited topical penetration. Effect is modest.", verdict: "Modest evidence" },
    { name: "Peptide + ceramide stack",  when: "PM, after actives, full barrier routine", avoid: "Stacking too many actives same step", note: "Ceramides and peptides are chemically compatible. A logical combination.", verdict: "Good pair" },
  ],
};

const HOWTOS = [
  { t: "Copper peptides — what the evidence says", time: 5, tech: "Serums", auth: "Nelly", date: "Apr 23", img: "https://images.unsplash.com/photo-1620916566398-39f1143ab7be?w=900&q=80&auto=format&fit=crop", kick: "Ingredients", pick: true },
  { t: "Signal peptides — finding the ones that work", time: 4, tech: "Essay", auth: "Iris", date: "Apr 18", img: "https://images.unsplash.com/photo-1571875257727-256c39da42af?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: true },
  { t: "The peptide marketing problem — a plain-English guide", time: 4, tech: "Essay", auth: "Nelly", date: "Apr 13", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: true },
  { t: "Peptides vs retinoids — can one replace the other", time: 4, tech: "Essay", auth: "Iris", date: "Apr 08", img: "https://images.unsplash.com/photo-1598440947619-2c35fc9aa908?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: true },
  { t: "Palmitoyl pentapeptide-4 — the most studied signal peptide", time: 5, tech: "Serums", auth: "Nelly", date: "Apr 03", img: "https://images.unsplash.com/photo-1512290923902-8a9f81dc236c?w=900&q=80&auto=format&fit=crop", kick: "Ingredients", pick: true },
  { t: "Where peptides sit in a layering routine", time: 3, tech: "Layering", auth: "Iris", date: "Mar 29", img: "https://images.unsplash.com/photo-1556228720-195a672e8a03?w=900&q=80&auto=format&fit=crop", kick: "Layering", pick: false },
  { t: "Peptides and niacinamide — a compatible pair", time: 3, tech: "Layering", auth: "Nelly", date: "Mar 24", img: "https://images.unsplash.com/photo-1570194065650-d99fb4bedf0a?w=900&q=80&auto=format&fit=crop", kick: "Layering", pick: false },
  { t: "Peptide stability — what compromises it", time: 4, tech: "Essay", auth: "Iris", date: "Mar 19", img: "https://images.unsplash.com/photo-1620916566398-39f1143ab7be?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
  { t: "GHK-Cu — copper peptides for beginners", time: 5, tech: "Serums", auth: "Nelly", date: "Mar 14", img: "https://images.unsplash.com/photo-1583416750470-965b2707b355?w=900&q=80&auto=format&fit=crop", kick: "Ingredients", pick: false },
  { t: "Neurotransmitter-inhibiting peptides — what they actually do", time: 5, tech: "Essay", auth: "Iris", date: "Mar 09", img: "https://images.unsplash.com/photo-1601049541289-9b1b7bbbfe19?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
  { t: "Peptides in a retinoid routine", time: 4, tech: "Layering", auth: "Nelly", date: "Mar 04", img: "https://images.unsplash.com/photo-1607006344380-b6775a0824a4?w=900&q=80&auto=format&fit=crop", kick: "Layering", pick: false },
  { t: "Reading peptide ingredient lists", time: 3, tech: "Essay", auth: "Iris", date: "Feb 27", img: "https://images.unsplash.com/photo-1571875257727-256c39da42af?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
  { t: "Peptide moisturiser vs peptide serum", time: 3, tech: "Format", auth: "Nelly", date: "Feb 22", img: "https://images.unsplash.com/photo-1512290923902-8a9f81dc236c?w=900&q=80&auto=format&fit=crop", kick: "Format", pick: false },
  { t: "When peptides are the right next addition", time: 4, tech: "Routine", auth: "Iris", date: "Feb 17", img: "https://images.unsplash.com/photo-1598440947619-2c35fc9aa908?w=900&q=80&auto=format&fit=crop", kick: "Routine", pick: false },
  { t: "Peptides for sensitive skin", time: 3, tech: "Essay", auth: "Nelly", date: "Feb 12", img: "https://images.unsplash.com/photo-1620916566398-39f1143ab7be?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
  { t: "Tripeptide-1 and tripeptide-10 — what they do", time: 5, tech: "Serums", auth: "Iris", date: "Feb 07", img: "https://images.unsplash.com/photo-1583416750470-965b2707b355?w=900&q=80&auto=format&fit=crop", kick: "Ingredients", pick: false },
  { t: "Ceramides and peptides — building a PM routine", time: 5, tech: "Layering", auth: "Nelly", date: "Feb 02", img: "https://images.unsplash.com/photo-1556228852-80b6e5eeff06?w=900&q=80&auto=format&fit=crop", kick: "Layering", pick: false },
  { t: "Are expensive peptide serums worth it", time: 4, tech: "Essay", auth: "Iris", date: "Jan 28", img: "https://images.unsplash.com/photo-1570194065650-d99fb4bedf0a?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
  { t: "What 'collagen-boosting' on a label means", time: 4, tech: "Essay", auth: "Nelly", date: "Jan 23", img: "https://images.unsplash.com/photo-1601049541289-9b1b7bbbfe19?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
  { t: "Peptides and skin ageing — a realistic view", time: 5, tech: "Essay", auth: "Iris", date: "Jan 18", img: "https://images.unsplash.com/photo-1607006344380-b6775a0824a4?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
  { t: "Peptide eye cream — what to look for", time: 3, tech: "Format", auth: "Nelly", date: "Jan 13", img: "https://images.unsplash.com/photo-1571875257727-256c39da42af?w=900&q=80&auto=format&fit=crop", kick: "Format", pick: false },
  { t: "Argireline — the most-discussed inhibiting peptide", time: 4, tech: "Serums", auth: "Iris", date: "Jan 08", img: "https://images.unsplash.com/photo-1556228720-195a672e8a03?w=900&q=80&auto=format&fit=crop", kick: "Ingredients", pick: false },
  { t: "Starting peptides for the first time", time: 3, tech: "Routine", auth: "Nelly", date: "Jan 03", img: "https://images.unsplash.com/photo-1598440947619-2c35fc9aa908?w=900&q=80&auto=format&fit=crop", kick: "Routine", pick: false },
  { t: "Peptide serums on a budget", time: 3, tech: "Essay", auth: "Iris", date: "Dec 28", img: "https://images.unsplash.com/photo-1512290923902-8a9f81dc236c?w=900&q=80&auto=format&fit=crop", kick: "Essay", pick: false },
];

const TECH_FILTERS = ["All", "Serums", "Layering", "Routine", "Essay", "Format"];

// Crosslinks to 4 adjacent ingredient siblings
const TYPE_CROSSLINKS = [
  { id: "ceramides",           title: "Ceramides",          deck: "Barrier lipids. A natural companion to peptides.",     count: 112, href: "/en/skin/ingredients/ceramides/" },
  { id: "niacinamide",         title: "Niacinamide",         deck: "Compatible pairing. Stable together.",                count: 163, href: "/en/skin/ingredients/niacinamide/" },
  { id: "retinoids",           title: "Retinoids",           deck: "The higher-evidence category. Peptides complement.",  count: 144, href: "/en/skin/ingredients/retinoids/" },
  { id: "humectants-vs-emollients", title: "Humectants vs Emollients", deck: "The hydration layer that goes with peptides.", count: 128, href: "/en/skin/ingredients/humectants-vs-emollients/" },
];

Object.assign(window, {
  OILY, TYPE_SIBLINGS, QUICK_FACTS, BEGINNER_PATH, TRENDING, FORMAT_GUIDE, HOWTOS, TECH_FILTERS, TYPE_CROSSLINKS,
});