Nicotinamide adenine dinucleotide ( NAD ) is a coenzyme found in all living cells. The compound is a dinucleotide, because it consists of two nucleotides joined through theirphosphate groups. One nucleotide contains an adenine base and the other nicotinamide. Nicotinamide adenine dinucleotide exists in two forms: an oxidized and reduced form abbreviated as NAD+ and NADH respectively.

Hebei Dongdu import& Export Co.,Ltd..   is a professional production of Chemical Products.   The company was established in 2000, the company actively explore overseas markets.   The products are mainly exported to North America, South USA, Europe, Australia, the Middle East, Southeast Asia Africa, etc..

Our company mainly production workshop covers an area of 16000 square meters, 10000 square meters factory in.   We are from China and the top machinery imported from domestic manufacturers of machinery and equipment, facilities.   To ensure the quality of products, we are constantly updating our equipment and new equipment.

As we built, we keep "quality policy, the pursuit of perfection, sincere service".   Through this policy, we provide high quality products and the best service for customers.   Our goal is to make progress, with the best value for their money to our customers.   As a result, we have gained great reputation from our customers.

We welcome you warmly inquiries.   We guarantee, sincere service, high quality products and competitive price.

1. Quality
Our products meet msds safe standard and we have iso and other certificate so yan can get high quality products from our company.

2.  Price
We are the company which is the joint of trade and industry so we cao provide the competitive price and high quality product.

3. Packing
We can do according to the customers' request.

4. Transport
EMS, DHL, TNT, UPS ,FEDEX, by air, by sea
DHL express, FEDEX and EMS for quantity less than 50kg, usually called as ddu service; 
sea shipping for quantity over 500kg; and air shipping is available for 50kg above;
for high value products, please select air shipping and DHL express for safe;

5. Service
we offer specialized logistic service including export declaration,customs clearance and every detail during shipment,this makes us able to offer you one-stop service from the order to the products transported to your hand.

Q1: Can you supply samples?
Yes, we can provide some free sample, but the shipping cost should be on the customers' account. You can either pay the shipping cost or arrange a courier to collect the samples.

Q2:What's the MOQ?
Differentiate according to the product value,1 gram or 50 kilograms and 100 kilograms.

Q3. How can I release the payment to you ?
We can receive your payment by T/T, ESCROW or Western union which is recommended, and we can also receive by L/C at sight.

Q4:How about delivery leadtime ?
About 3-5 working days after receipt of  your payment.

Q5:Is there a discount?
Yes, for large quantity, we always support with better price

Q6:How do you treat quality complaint?
A: First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.

Q7:How to confirm the Product Quality before placing orders?
A: You can get free samples for some products, you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests, we will manufacture the products according to your requests