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We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Douglas Laboratories Corvalen is a pure D-ribose powder supplement designed to support cardiovascular health, cellular energy production, fatigue support, and mitochondrial function. Each serving provides 5 grams of D-ribose, a naturally occurring pentose sugar that helps support the body’s normal production of ATP, the primary energy currency used by cells.
This unflavored, slightly sweet powder is ideal for adults looking for daily energy support, athletic endurance support, heart health support, and mitochondrial wellness. Douglas Laboratories Corvalen contains no listed excipients and is made without gluten, soy, corn, dairy, artificial colors, artificial preservatives, artificial flavors, or GMO ingredients.
| Feature | Details |
|---|---|
| Product Name | Douglas Laboratories Corvalen |
| Brand | Douglas Laboratories |
| Form | Powder |
| Main Ingredient | D-Ribose |
| Net Weight | 10.18 oz / 288.6 g |
| Serving Size | 5 g / 1 scoop / 2 teaspoons |
| Product Support | Cardiovascular health, fatigue support, energy production, mitochondrial function |
| Ingredient | Amount Per Serving | % Daily Value |
|---|---|---|
| D-Ribose | 5 g | Daily Value not established |
| Ingredient Type | Ingredient | Purpose |
|---|---|---|
| Active Ingredient | D-Ribose | Supports ATP production, cellular energy, cardiovascular health, and mitochondrial function |
| Other Ingredients | No other ingredients listed | Pure powder formula with no listed excipients |
| Claim | Details |
|---|---|
| GMO-Free | Contains no genetically modified ingredients |
| Gluten-Free | Contains no wheat or gluten |
| Dairy-Free | Contains no milk or dairy products |
| Soy-Free | Contains no soy |
| Corn-Free | Contains no corn |
| No Artificial Additives | No artificial coloring, preservatives, or flavoring listed |
Suggested use: Mix 1 scoop, equal to 5 grams or about 2 teaspoons, with water or another beverage. Common adult use is 5 grams one to two times daily, or as directed by a qualified healthcare professional.
Best time to take: Take in the morning for daily energy support, or before activity for exercise support. It may also be taken with the evening meal if using twice daily.
Food and hydration tips: Douglas Laboratories Corvalen may be taken with or without food. Sensitive users may prefer taking it with meals. Mix thoroughly in water, juice, or a smoothie and maintain good hydration throughout the day.
Daily or cyclic use: This formula is suitable for daily use when directed by a healthcare professional. Athletes may use it around training periods, while general wellness users may prefer consistent daily use.
What to expect: D-ribose supports normal cellular energy metabolism. Effects may vary by individual and are typically best evaluated after consistent use.
Warnings: Consult a healthcare professional before use if pregnant, nursing, diabetic, hypoglycemic, taking medication, managing a heart condition, or under medical supervision. Keep out of reach of children.
D-Ribose: A naturally occurring sugar involved in the structure of ATP. It supports cellular energy production, mitochondrial function, cardiovascular wellness, and exercise endurance.
Other Ingredients: No other ingredients are listed. The formula does not list fillers such as magnesium stearate, rice flour, silica, flavors, colors, or preservatives.
Formulation Synergy: Douglas Laboratories Corvalen uses a single-ingredient D-ribose formula to deliver targeted energy-metabolism support without unnecessary excipients. Because D-ribose dissolves easily and absorbs readily, it works as a clean powder option for people who want flexible dosing and simple ingredient transparency.
Douglas Laboratories Corvalen is used to support cellular energy production, cardiovascular health, fatigue support, athletic endurance, and mitochondrial function.
Each serving of Douglas Laboratories Corvalen provides 5 grams of D-ribose powder.
Yes, Douglas Laboratories Corvalen is listed as free from wheat and gluten.
Douglas Laboratories Corvalen is listed as free from artificial coloring, artificial preservatives, and artificial flavoring.
Yes, Douglas Laboratories Corvalen may support healthy endurance, strength training, and post-exercise energy recovery.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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