Top Grade L Tyrosine, Tyrosine Usp

---If we can get some sample for testing before our purchasing
Yes, 20~100g free sample is available, but freight charges will be at customer’s account, and then freight charges will be returned or deduct from the future order, or the sample can be sent by your express account.
---Which kind of payment do you accept?
1. For small order, you can pay by Paypal, Western Union or MoneyGram, or through Alibaba.
2. Normal order by T/T.
---How do you ship the cargo to us?
By DHL Express, By Air or By Sea
---How your quality is assured and keep the stability?
1. Firstly, our products strictly conform with the specification, and free sample is available for your evaluation before the order.
2. We test the active ingredient, heavy metal and microorganism for every batch of the cargo before the shipment.
3. We can do the thirdparty test(SGS, Euofins, Silliker etc) as per your requirements, and the sample of every batch marked with buyer’s name will kept in our sample room for 2 years.