Kai Lin, Licensed Pharmacist (China)
Services · Sample work · Credentials · Contact
I help Chinese supplement and herbal brands get labels and claims ready for FDA and Amazon review — and I point to the exact line that puts a listing at risk.
I am a licensed hospital pharmacist in China, 17 years in practice.
Most labels I see are not dishonest. They are written by someone who copied a competitor, translated a Chinese formula sheet word for word, or asked a content tool to make the product sound stronger. The problem is rarely the intention. It is the wording.
Services
Label review — FDA and Amazon requirements.
Supplement Facts panel, serving size, ingredient naming, proprietary blends, allergen and warning statements, and the listing fields that trigger takedowns.
Claim review.
Separating a structure-function claim from a disease claim, spotting the words that cross the line, and rewriting them without gutting the marketing.
Herbal checks and interaction screening.
What is actually in the formula, what it does at the dose on the label, and what published evidence says about taking it alongside warfarin, antihypertensives, diabetes drugs, or lithium. I read both the Chinese source material and the English label.
Content fact-checking and post-flag support.
Doses, cited studies, statistics, and the references behind health content. If a listing or a page has already been flagged, I identify what likely triggered it and what to change.
Contact
Send me the label, or the listing link, and one sentence about the market you are selling into. I reply within one working day.
linkai1991@outlook.com — or order a fixed-scope review through Fiverr.
Not ready to send anything yet? That is fine. Ask a question first.
Sample work
- “Patients ask for antibiotics because they are afraid” — KevinMD, October 2026. Read it on KevinMD.
- “Tejocote Root Side Effects: What That FDA Warning Actually Means” — on this blog. Read the article.
- “Zinc vs Vitamin C for Colds: What the Evidence Says” — on this blog. Read the article.
Credentials
- Licensed Pharmacist, China, certified 2015
- Hospital pharmacist, 17 years: prescription review, interaction checks, patient counselling
- Member, Intravenous Compounding Committee, Shantou Medical Association, 2026–2029
- Trained in both Western pharmacy and traditional Chinese medicine
- Published in KevinMD
- Author of two books on supplements (below)
Who I work with
Chinese manufacturers and Amazon sellers taking herbal or supplement products to the US market. Brand owners preparing a launch. Agencies that want a pharmacist’s review before something goes public.
How I work
Every finding cites the regulation or guidance line, so you can check it yourself. I review content and claims. I do not provide legal advice, and I do not promise that a product will pass FDA review or stay listed.
Background
Seventeen years behind a hospital pharmacy counter, checking prescriptions, catching interactions, and answering the same question every day: “Is this supplement actually good for me — or am I wasting my money?” Training in both Western medicine and traditional Chinese medicine means I can read a supplement label and a herbal formula with the same skeptical eye. Over that time I watched people spend real money on products the research does not support, and skip the cheap unglamorous ones that do work. This blog is where I write about what I have seen and what the studies actually say.
A few things I believe
Evidence over anecdotes. If a claim can’t survive contact with a clinical trial, it shouldn’t survive contact with your wallet.
You deserve the source. I cite the studies I’m talking about, so you can check my work.
Supplements are support, not medicine. Anyone who tells you a pill replaces your prescribed medication — or a flu shot — is not your friend.
This site is education, not a prescription pad. Everything here is for educational purposes only and is not personalized medical advice. If you are considering starting, stopping, or changing any medication or supplement, talk to your doctor or pharmacist first.
Books
I’m the author of two books, both available now on Amazon Kindle:
Both start from the same place: the research. One cuts through the marketing around popular herbal supplements; the other is a practical, evidence-backed guide to what is actually worth taking — and what to skip.
Where else you can find me
LinkedIn — where I post about label and claim problems I run into: linkedin.com/in/kai-lin-8b4897428
Substack — The Pharmacist’s Desk, the weekly voice edition of this blog: kailinpharmacist.substack.com
Quora — answers on supplement safety, herbal medicine, and drug interactions: quora.com/profile/Kai-Lin-271
Prefer email? I also publish The Pharmacist’s Desk, a free weekly newsletter with the same evidence-first guidance — one email a week, no spam, unsubscribe anytime. Subscribe here.