Ten questions, answered the way you'd want them answered.

Honestly — some people feel focus within an hour from the caffeine + L-theanine combo. The mushroom contributions take 7-14 days of daily use before most users report a difference. This matches the published literature: acute-dose studies show small effects; the larger effects come from consistent intake. If you expect "one cup and I'm transformed," this isn't that product. If you expect "steady focus, no afternoon crash, stack of pills retired," that's what Solin is built for.

Two reasons. First: our dose is larger per serving (1 g lion's mane vs ~500 mg in most competitors) and 100% fruiting body vs mycelium-on-grain — the per-gram cost of real fruiting-body extract is higher. Second: the $49.99 = $1.67/serving slots us between RYZE ($1.23) and Magic Mind shots ($3.00). Subscribe-and-save brings it to $1.33/serving, matching MUD\WTR subscription.

Third-party COA published per batch. Nammex's research uses a Megazyme beta-glucan assay — we publish the exact percentage on every batch. Fruiting body averages 30-40% beta-glucans; mycelium-on-grain typically 5-7%. If our COA doesn't show fruiting-body numbers, call it out publicly and we'll refund the batch.

You are notified and refunded. This is a paid $49.99 first-batch preorder, not a deposit hold. Product mockup only; batch is not manufactured yet. If testing or production fails, we stop the project and publish the full post-mortem on our-story. That's written into the operating rules at buildinthesun.com.

The caffeine in one serving (~90 mg) is about one drip-coffee cup. The L-theanine (200 mg) dulls the caffeine spike per the Haskell 2008 focus trial. Most users don't report the afternoon crash. You might still hit a 3pm dip if you skipped lunch — Solin isn't a replacement for food.

Lion's mane, cordyceps, and reishi are GRAS (Generally Recognized as Safe) at the doses we use. L-theanine is a natural amino acid in green tea. If you take anticoagulants, SSRIs, immunosuppressants, or have autoimmune conditions, check with your doctor before adding any new supplement — standard advice for anything in this category, not specific to Solin.

Sachets are travel-friendly, TikTok-shareable, and enforce the "one cup" promise. Tubs are the monthly resupply for the subscribers who've passed the trial phase. Same formula in both.

US-based FDA-registered cGMP-certified manufacturer. We publish the specific facility once the first batch is contracted. The mushroom extracts themselves are sourced from Nammex or equivalent-grade fruiting-body suppliers; origin details on each batch's COA.

Not yet. Amazon's January-2026 dietary-supplement policy requires NSF/ANSI 173-2023 testing from one of seven approved TIC labs before a listing can go live. We're on the Shopify DTC path first; Amazon comes after the first batch clears compliance testing. Estimated timeline: 3-4 months post-first-batch.

Target: 60 days from enough confirmed preorders to justify production. Preorders are refundable at any time before the batch ships. The 120-day window is the max — if we don't ship by then, you're notified and refunded automatically.