Q1: Is Youyou Biotechnology a trading company or a manufacturing factory?
We are a professional manufacturer rather than a trading company. With over 12 years of dedication to nutritional & health raw materials, Youyou Biotechnology Co., Ltd. is driven by innovative, sophisticated and state-of-the-art biotechnologies. We strive to deliver premium nutraceutical ingredients and dependable export services to clients worldwide.
Q2: What is your company’s core philosophy?
Our core philosophy is Quality First, Reputation Foremost. Beyond high-quality products, we are committed to delivering reliable services and sustainable value for global partners.
Q3: Which major markets do you export to?
Our products are widely exported to North America, South America, the EU and many other regions. We possess solid compliance experience and complete documentary support to meet regulatory requirements of different target markets.
What certifications does your company hold?
Our factory operates in strict accordance with international quality management systems. For the full and latest list of certifications including GMP, ISO, HACCP, HALAL, KOSHER and more, please contact our sales team. Factory audits are welcome, and on-site visits can be scheduled in advance.
Q5: What quality standards do your products comply with?
Our raw materials conform to international pharmacopoeia standards such as FCC, USP and EP, as well as food additive specifications. We provide corresponding Certificate of Analysis (COA) for each product, covering key indicators including active ingredient content, heavy metal residues, microbial limits and residual solvents.
How do you guarantee product quality and batch consistency?
We conduct in-process inspection and pre-shipment testing for every batch to ensure full compliance with agreed quality standards. We implement rigorous controls throughout the whole supply chain, including supplier management, incoming material inspection, production process supervision (SOP & CCP monitoring), batch record keeping and sample retention, enabling full traceability of all products.
Q7: Are your products tested by third-party laboratories?
Yes. Besides in-house testing, we can arrange re-inspection by independent third-party labs such as SGS and Intertek as per clients’ requests, and provide corresponding test reports for each batch.
Q8: Can you provide free samples?
Free samples are typically provided upon request. The courier freight shall be borne by the customer. Please confirm the detailed policy with our sales team. For some specialty items, the sample cost is calculated at the same unit price as the bulk product (per kilogram), rather than being provided free of charge.
Q9: What is your Minimum Order Quantity (MOQ)?
The MOQ varies by product type and specifications. Some items are available starting from 1 KG, and small trial orders are acceptable. Please inform our sales team of your target quantity for a customized solution.
Q10: What payment terms do you accept?
We mainly accept T/T (Telegraphic Transfer). Flexible payment terms can be negotiated based on order value and cooperation terms.
Q11: What is your lead time?
Normally, the lead time is 7 to 30 days upon order confirmation, depending on product type and order volume. For special formulas or customized products, the lead time is about 20 to 25 days. Please confirm the exact schedule with our sales team before placing orders.
Q12: What shipping methods and trade terms do you offer?
We support sea freight, air freight and express delivery. Our commonly adopted trade terms include FOB and CIF. Other terms such as EXW and DDP are also negotiable upon customer requirements.
Q13: Do you provide after-sales technical support after contract signing?
Absolutely. We maintain close communication with clients throughout the whole process, from project discussion, R&D sampling, production and quality inspection to delivery. We also offer professional technical consulting covering product registration documents, formula development, dosage form selection and compliance filing.
Q14: How do you handle shipping issues or quality disputes?
We handle all issues in strict compliance with international trade practices and contract provisions. All shipments are insured in line with Incoterms rules. We will assist clients with claims in case of cargo damage during transit. Any quality disputes will be assessed and resolved through negotiation based on agreed quality standards and COA reports.
What is Paraxanthine?
Paraxanthine is a naturally occurring caffeine metabolite and an emerging functional ingredient used in energy, focus, and sports nutrition supplements.
Unlike caffeine, which is metabolized into multiple compounds, paraxanthine is the primary metabolite produced when the human body processes caffeine. It has gained increasing attention as a next-generation ingredient for clean energy, cognitive performance, and physical performance formulations.
As a professional paraxanthine manufacturer, Youyou Biotechnology provides high-quality paraxanthine ingredients for global supplement brands, contract manufacturers, and ingredient distributors.
What are the benefits of Paraxanthine?
Paraxanthine is widely studied for its potential applications in:
Energy support
Mental focus and alertness
Cognitive performance
Sports performance
Physical endurance
Compared with traditional stimulant ingredients, paraxanthine is attracting attention as a clean energy ingredient for modern consumers seeking sustained performance without the common concerns associated with conventional caffeine products.
For supplement brands, paraxanthine provides an opportunity to develop innovative energy and performance products with a differentiated ingredient story.
What is the difference between Paraxanthine and caffeine?
Paraxanthine and caffeine are closely related but have different metabolic characteristics.
Caffeine is the original compound, while paraxanthine is the major metabolite produced after caffeine metabolism in the body.
Paraxanthine is increasingly researched as an alternative ingredient for brands looking to develop advanced energy and performance formulas.
Is Paraxanthine a good ingredient for pre-workout supplements?
Yes. Paraxanthine is becoming an attractive ingredient for pre-workout and sports nutrition formulations.
Modern athletes and fitness consumers are increasingly looking for ingredients that support:
Energy availability
Focus during training
Performance optimization
Sustained exercise intensity
Compared with traditional pre-workout formulas dominated by caffeine, paraxanthine provides brands with an opportunity to create premium and differentiated pre-workout products.
Youyou Biotechnology supplies high-quality paraxanthine ingredients suitable for sports nutrition brands and contract manufacturers.
Can Paraxanthine be used in energy supplements?
Yes. Paraxanthine is an emerging ingredient for energy supplements, functional beverages, and cognitive performance products.
It can be used in applications including:
Energy capsules
Pre-workout powders
Functional drinks
Focus supplements
Nootropic formulations
With growing consumer demand for cleaner and more advanced energy solutions, paraxanthine represents a promising opportunity for innovative supplement brands.
Why choose Youyou Biotechnology as a Paraxanthine supplier?
Youyou Biotechnology is a GMP-standard nutraceutical ingredient manufacturer specializing in innovative health ingredients.
Our advantages include:
GMP-compliant manufacturing capabilities
Strong R&D team led by experienced scientists
Proprietary technologies and patented innovations
Large-scale production capacity
Flexible MOQ support
Comprehensive technical support
We support global brands, distributors, and contract manufacturers with reliable paraxanthine supply solutions.
What forms of Paraxanthine do you supply?
Youyou Biotechnology supplies paraxanthine ingredients in powder form suitable for supplement manufacturing applications.
Our team can support customers with:
Product specifications
Technical documentation
Quality analysis
Sample evaluation
Commercial-scale supply
We provide flexible cooperation options from laboratory testing quantities to large-scale commercial production.
What dosage is commonly used for Paraxanthine supplements?
The dosage of paraxanthine depends on the product format, formulation strategy, and target application.
Supplement brands typically determine the final dosage based on:
Product positioning
Regulatory requirements
Target consumer group
Supporting scientific information
Youyou Biotechnology provides technical support to help customers develop suitable formulations.
Is Paraxanthine suitable for sports nutrition brands?
Yes. Paraxanthine is particularly suitable for sports nutrition brands developing:
Pre-workout supplements
Performance formulas
Energy products
Focus-enhancing supplements
As consumers move toward more sophisticated performance nutrition products, paraxanthine offers brands a differentiated ingredient option beyond traditional caffeine-based formulas.
How can I purchase Paraxanthine from Youyou Biotechnology?
Youyou Biotechnology provides paraxanthine ingredients for:
Supplement brands
Contract manufacturers
Ingredient distributors
We support:
Sample requests
Technical discussions
Product development projects
Bulk commercial orders
What is Deoxynojirimycin Hydrochloride (DNJ HCl)?
Deoxynojirimycin Hydrochloride (DNJ HCl) is a hydrochloride salt form of 1-Deoxynojirimycin (DNJ), a naturally occurring iminosugar commonly found in mulberry plants.
DNJ HCl is widely studied for its ability to inhibit α-glucosidase, an enzyme involved in carbohydrate digestion, making it a popular ingredient in metabolic health and blood sugar management supplements.
Youyou Biotechnology supplies high-quality DNJ HCl ingredients for dietary supplement brands, contract manufacturers, and global distributors.
What are the benefits of DNJ HCl?
DNJ HCl is primarily recognized for its applications in metabolic health formulations.
Research suggests that DNJ may support:
Healthy carbohydrate metabolism
Blood glucose management
Metabolic wellness
Weight management programs
Due to its unique mechanism as an α-glucosidase inhibitor, DNJ HCl has become an attractive ingredient for modern dietary supplements targeting metabolic health.
How does DNJ HCl work?
DNJ HCl works by inhibiting α-glucosidase enzymes involved in the breakdown of carbohydrates into glucose.
By slowing carbohydrate digestion, DNJ may help support a more balanced post-meal glucose response.
This mechanism has made DNJ HCl a valuable ingredient for supplement brands developing products focused on glucose metabolism and healthy weight management.
What is the relationship between DNJ HCl and white mulberry?
DNJ naturally occurs in plants, especially white mulberry (Morus alba) leaves.
White mulberry extract containing DNJ has traditionally been used in nutritional products focused on metabolic health. Compared with botanical extracts, purified Deoxynojirimycin Hydrochloride (DNJ HCl) provides a standardized ingredient solution with consistent specifications.
This makes DNJ HCl suitable for premium dietary supplement formulations.
Can DNJ HCl be used in weight management supplements?
Yes. DNJ HCl is increasingly used in weight management and metabolic health supplements.
By supporting healthy carbohydrate metabolism, DNJ HCl can be incorporated into formulations designed for:
Weight management
Metabolic balance
Healthy lifestyle support
For supplement brands, DNJ HCl offers a science-based ingredient option for developing differentiated metabolic health products.
What is the recommended DNJ HCl dosage?
The appropriate DNJ HCl dosage depends on the formulation design, target application, and regulatory requirements of different markets.
Supplement manufacturers typically determine dosage based on:
Product positioning
Scientific research
Regional regulations
Target consumer needs
Youyou Biotechnology provides technical documentation and formulation support for customers developing DNJ HCl-based products.
Where can I buy DNJ HCl?
Youyou Biotechnology is a professional Deoxynojirimycin Hydrochloride (DNJ HCl) manufacturer supplying high-quality ingredients for:
Dietary supplement brands
Contract manufacturers
Ingredient distributors
Our advantages include:
GMP-standard manufacturing
Strong R&D capabilities
Stable production capacity
Flexible MOQ support
Technical support
Contact Youyou Biotechnology for reliable DNJ HCl supply solutions.
What is Dihydroberberine?
Dihydroberberine is a hydrogenated derivative of berberine and an emerging functional ingredient used in metabolic health and weight management supplements.
Compared with traditional berberine, dihydroberberine has gained attention for its improved bioavailability and potential applications in modern dietary supplement formulations.
Youyou Biotechnology supplies high-quality dihydroberberine ingredients for supplement brands, contract manufacturers, and distributors worldwide.
What are the benefits of Dihydroberberine?
Dihydroberberine is primarily studied for its potential benefits related to metabolic health.
Research suggests that dihydroberberine may support:
Healthy glucose metabolism
Metabolic balance
Energy metabolism
Weight management programs
Due to its improved absorption characteristics compared with traditional berberine, dihydroberberine has become an attractive ingredient for next-generation metabolic health supplements.
Can Dihydroberberine support weight loss?
Dihydroberberine is increasingly used in weight management and metabolic health formulations.
By supporting healthy metabolic function and glucose utilization, dihydroberberine may help complement lifestyle-based weight management programs.
For supplement brands, dihydroberberine provides an innovative ingredient option for developing premium weight management products.
What is the recommended Dihydroberberine dosage?
Supplement manufacturers typically determine dosage based on:
Scientific research
Product positioning
Target consumer needs
Regional regulations
Youyou Biotechnology provides technical support to help customers develop dihydroberberine supplement formulations.
What is the difference between Berberine and Dihydroberberine?
Berberine and dihydroberberine are closely related compounds used in metabolic health supplements.
Dihydroberberine is developed as a modified form of berberine with improved bioavailability characteristics, making it an attractive option for brands seeking advanced metabolic health ingredients.
Berberine Dihydroberberine
Category Traditional botanical compound Advanced berberine derivative
Application Metabolic health supplements Next-generation metabolic formulations
Key advantage Established ingredient Improved absorption potential
How is Dihydroberberine used in dietary supplements?
Dihydroberberine is commonly used in formulations targeting:
Weight management
Metabolic health
Glucose support
Healthy lifestyle products
It can be incorporated into capsules, tablets, and other dietary supplement formats.
Youyou Biotechnology provides reliable dihydroberberine supply solutions for global brands and contract manufacturers.
Where can I buy Dihydroberberine?
Youyou Biotechnology is a professional dihydroberberine manufacturer supplying high-quality ingredients for:
Dietary supplement brands
Contract manufacturers
Ingredient distributors
Our advantages include:
GMP-standard manufacturing
Strong R&D capabilities
Stable production capacity
Flexible MOQ support
Technical documentation
Contact Youyou Biotechnology for reliable dihydroberberine supply solutions.
What is Urolithin A?
Urolithin A is a naturally occurring metabolite produced by gut microbiota from ellagitannins found in foods such as pomegranate, berries, and nuts.
It has gained significant attention in the nutraceutical industry due to its role in mitochondrial health and mitophagy, a natural cellular process responsible for removing damaged mitochondria and supporting cellular renewal.
As an emerging longevity ingredient, Urolithin A is widely used in dietary supplements targeting healthy aging, muscle health, cellular energy, and performance nutrition.
Youyou Biotechnology provides high-quality Urolithin A ingredients for global supplement brands, contract manufacturers, and ingredient distributors.
What are the benefits of Urolithin A?
Urolithin A has attracted attention for its potential benefits related to mitochondrial function and healthy aging.Research suggests that Urolithin A may support:
Mitochondrial quality control、Cellular energy metabolism、Muscle health and physical performance、Healthy aging、Overall cellular wellness,
One of the key mechanisms associated with Urolithin A is mitophagy, the process through which cells selectively remove damaged mitochondria and maintain mitochondrial quality.
For supplement brands, Urolithin A provides a science-backed ingredient opportunity for developing premium longevity and performance products.
What is the relationship between Urolithin A and mitophagy?
Mitophagy is a natural cellular process that removes dysfunctional mitochondria and helps maintain mitochondrial quality.Urolithin A has been widely studied for its relationship with mitophagy and mitochondrial health. By supporting mitochondrial quality control pathways, Urolithin A has become a popular ingredient in longevity and healthy aging supplements.
This mechanism is one of the main reasons Urolithin A is considered a next-generation ingredient for cellular health applications.
What foods contain Urolithin A?
Urolithin A itself is not naturally present in significant amounts in most foods.Instead, foods such as:Pomegranate、Walnuts、Strawberries、Raspberries,
Other ellagitannin-rich foods,contain compounds called ellagitannins, which can be converted into Urolithin A by specific gut bacteria.
However, individual production varies significantly depending on gut microbiota composition. This is why Urolithin A supplementation has become an effective approach for delivering consistent and standardized amounts of Urolithin A.
Are there any Urolithin A side effects?
Urolithin A has been studied in human clinical research and is generally considered well tolerated when used appropriately.As with any dietary supplement ingredient, individual responses may vary depending on health conditions, formulation, and usage.Supplement brands should always develop products according to applicable regulatory requirements and quality standards.Youyou Biotechnology provides technical documentation and quality support for global customers.
What are the health benefits of choline itself?
Choline is an essential nutrient for the human body: it participates in acetylcholine synthesis (supporting nerve transmission, memory, and muscle control), maintains cell membrane integrity and hepatic lipid metabolism, and serves as a precursor for methyl donors in the methylation cycle. Consequently, this product offers a dual-action benefit—combining "mitophagy activation" with "choline nutritional support"—making it ideal for sports nutrition, brain health, and healthy aging product categories.
Why formulate it as a choline salt?
Salt formation is a classic pharmaceutical strategy; using highly biocompatible choline as the counter-ion fundamentally resolves dissolution issues. Furthermore, since choline is an essential nutrient, this approach offers a "two-for-one" advantage.
What is its stability profile? What are the requirements for storage and formulation?
Regarding raw materials, storage in a cool, dry, light-protected, and sealed environment is recommended. For formulation, dosage forms that shield against light and moisture—such as capsules or compressed tablets (with light-protective coating)—are advised; liquid formulations require prior stability assessment. The salt form offers more controllable dissolution consistency and more stable bioavailability across batches.
What product categories is it suitable for?
① Muscle health and sports nutrition (maintaining muscle strength, exercise recovery); ② Healthy aging/anti-aging (mitochondrial health, cellular energy); ③ Immune support (combating immunosenescence); ④ Brain health (neuroprotection, R&D focus); ⑤ Metabolic health (exploratory application).
What is Berberine Vitamin C Salt?
Berberine Vitamin C Salt is a patented novel berberine salt developed by Youyou Biotech.
It is protected by U.S. Patent No. US11345697B1 and was developed through innovative salt-form technology to improve the physicochemical properties of berberine.
How is Berberine Vitamin C Salt different from Berberine HCl?
Berberine Vitamin C Salt features a unique Vitamin C salt form and crystal structure that differentiates it from Berberine HCl.
Compared with Berberine HCl, it demonstrates improved solubility and significantly enhanced systemic exposure in pharmacokinetic evaluation.
What are the key advantages of Berberine Vitamin C Salt?
Key advantages include:
50–100× higher water solubility compared with Berberine HCl
Nearly 6× higher bioavailability compared with Berberine HCl
U.S. crystal form patent protection
These characteristics provide brands with a differentiated berberine ingredient solution.
Is there scientific evidence supporting its enhanced bioavailability?
Yes.
A pharmacokinetic study comparing Berberine Vitamin C Salt and Berberine HCl showed:
Cmax: 3277 ng/mL vs 531 ng/mL
AUC₀-t: 9087 ng·h/mL vs 1545 ng·h/mL
The results demonstrated significantly higher systemic exposure of Berberine Vitamin C Salt compared with Berberine HCl.
Why choose Berberine Vitamin C Salt for product development?
As the berberine market continues to grow, brands are seeking more differentiated ingredient solutions beyond conventional Berberine HCl.
Berberine Vitamin C Salt provides a next-generation innovation platform through patented technology, enhanced solubility, and improved bioavailability.
What is Spermidine Trihydrochloride?
Spermidine Trihydrochloride is a stable salt form of spermidine widely used as a dietary supplement ingredient.
Spermidine is a naturally occurring polyamine found in various foods and has attracted attention in the longevity and healthy aging fields due to its relationship with cellular processes such as autophagy.
Youyou Biotechnology supplies high-quality Spermidine Trihydrochloride ingredients for supplement brands, contract manufacturers, and distributors worldwide.
What are the benefits of Spermidine?
Spermidine has been widely studied for its potential role in healthy aging and cellular health. Research suggests that spermidine may support:
/ Cellular renewal through autophagy
/ Healthy aging
/ Normal cellular function
/ Overall wellness
Due to its connection with autophagy and longevity research, spermidine has become a popular ingredient in premium dietary supplements.
How does Spermidine support autophagy?
Autophagy is a natural cellular process responsible for removing damaged cellular components and maintaining cellular balance.
Spermidine has been studied for its ability to influence autophagy-related pathways, which is one of the key reasons it has gained attention as a longevity ingredient.
For this reason, spermidine is increasingly used in healthy aging and cellular health supplement formulations.
What foods contain Spermidine?
Spermidine naturally occurs in various foods, especially:
/ Wheat germ
/ Soybeans
/ Mushrooms
/ Legumes
/ Aged cheese
Among natural sources, wheat germ spermidine is one of the most recognized sources due to its relatively high spermidine content.
However, dietary intake may vary depending on food sources and individual dietary habits. Standardized Spermidine Trihydrochloride supplementation provides a consistent and reliable ingredient source for supplement formulations.
What is the difference between Wheat Germ Spermidine and Spermidine Trihydrochloride?
Wheat germ spermidine is a natural food-derived source containing spermidine along with other compounds.
Spermidine Trihydrochloride (Spermidine 3HCl) is a purified and standardized form designed for precise formulation and consistent quality.
For supplement manufacturers requiring consistent specifications and scalable supply, Spermidine Trihydrochloride is a preferred ingredient choice.
What is the recommended Spermidine dosage?
The recommended spermidine dosage depends on the formulation, application, and product positioning.
Supplement brands typically determine dosage based on:
/ Target market requirements
/ Product format
/ Scientific research
/ Regulatory considerations
Can Spermidine be combined with Resveratrol?
Yes. Spermidine and resveratrol are both popular longevity ingredients and are sometimes combined in healthy aging formulations.
While resveratrol is commonly associated with antioxidant and cellular pathways, spermidine is particularly recognized for its connection with autophagy.
Combining different longevity ingredients allows brands to create differentiated formulations targeting cellular health and healthy aging.
Where can I buy Spermidine Trihydrochloride?
Youyou Biotechnology is a professional Spermidine Trihydrochloride manufacturer and supplier providing high-quality ingredients for:
/ Dietary supplement brands
/ Contract manufacturers
/ Ingredient distributors
Our advantages include:
/ GMP-standard manufacturing
/ Strong R&D capability
/ Stable production capacity
/ Flexible MOQ support
/ Technical documentation
Contact Youyou Biotechnology for reliable Spermidine Trihydrochloride supply solutions.
