Our Ingredients

100% Transparent, High-Quality Ingredients—No Hidden Fillers

At Darko, we believe that great supplements start with great ingredients. That’s why we source only the highest-quality, most bioavailable ingredients for our 8 premium supplement formulas—no hidden fillers, no proprietary blends, no artificial additives. Every ingredient we use is carefully selected for its potency, purity, and scientific backing, and every single ingredient is clearly listed on our product labels (no exceptions).

We source our ingredients from trusted, ethical suppliers around the world, and all our ingredients undergo rigorous third-party testing for purity, potency, and contaminants before being used in our formulas. We also prioritize non-GMO, gluten-free, and vegan-friendly ingredients whenever possible—so you can feel good about what you’re putting in your body.

Our Ingredient Sourcing Standards

We hold our ingredient suppliers to the highest standards, and we only work with suppliers who meet our strict criteria for quality, ethics, and transparency. Our sourcing standards include:

Traceability: All ingredients are fully traceable from source to finished product—we know exactly where every ingredient comes from and how it’s processed.
Purity: All ingredients are tested for contaminants, heavy metals, pesticides, and residual solvents—meeting or exceeding FDA and California Prop 65 standards.
Potency: All active ingredients are standardized to ensure consistent potency and effectiveness—so you get the same results every time you take our supplements.
Ethics: We source ingredients from suppliers who follow ethical and sustainable practices—including fair labor, animal welfare, and environmental stewardship.
Transparency: Our suppliers provide full documentation for all ingredients, including COAs (Certificates of Analysis) and testing reports.

Key Active Ingredients We Use

Our 8 premium supplement formulas feature a curated selection of science-backed active ingredients, each chosen for its specific health benefits. Below are some of the key active ingredients we use, and the science behind their benefits:

Omega-3 Fatty Acids (EPA/DHA): Sourced from wild-caught fish oil (or algae for vegan formulas), supports heart health, brain function, and inflammation reduction—standardized to 60% EPA/DHA for maximum potency.
Probiotics (Lactobacillus & Bifidobacterium): Clinically studied strains for gut health, immune support, and digestive balance—10+ billion CFUs per serving, with prebiotic fiber to support probiotic growth.
Vitamin D3 (Cholecalciferol): The most bioavailable form of vitamin D, supports immune health, bone health, and mood—sourced from lanolin (sheep’s wool) for purity and potency.
Magnesium (Glycinate): A highly absorbable form of magnesium, supports muscle function, sleep, and stress management—no digestive upset, unlike other magnesium forms.
Curcumin (Turmeric Extract): Standardized to 95% curcuminoids, supports inflammation reduction and joint health—blended with black pepper extract (piperine) to boost absorption by 2000%.
Collagen Peptides: Sourced from grass-fed, pasture-raised bovine hide, supports skin health, joint health, and gut health—hydrolyzed for easy absorption, unflavored and odorless.
Adaptogens (Ashwagandha, Rhodiola, Holy Basil): Clinically studied adaptogenic herbs that support stress management, energy, and mood—sourced from organic farms, standardized for active compounds.

Our Inactive Ingredients—Only What’s Necessary

We use only the minimal amount of inactive ingredients (also known as excipients) needed to create a stable, effective supplement—no unnecessary fillers, binders, or additives. All our inactive ingredients are food-grade, non-GMO, and gluten-free, and are clearly listed on our product labels.

Our inactive ingredients include:

Vegetable cellulose (capsule shell) – vegan, gluten-free
Rice flour – non-GMO, gluten-free (used as a flow agent)
Vegetable magnesium stearate – non-GMO, gluten-free (used as a lubricant)
Natural flavors – fruit and herbal extracts (no artificial flavors or sweeteners)
Stevia leaf extract – natural sweetener (zero calories, no artificial sweeteners)

We never use the following in any of our formulas: artificial flavors, colors, or preservatives; gluten; soy; dairy; nuts (except for coconut, which is tree nut-free); wheat; or corn (except for non-GMO corn starch in select formulas).

Third-Party Testing for Ingredients

Every ingredient we source undergoes rigorous third-party testing by ISO-accredited labs before being used in our formulas. We test for:

Potency (to ensure the ingredient meets our standardized levels)
Purity (to detect contaminants, heavy metals, pesticides, and residual solvents)
Identity (to verify that the ingredient is what it claims to be—no adulteration)
Microbials (to detect harmful bacteria, mold, and yeast)

We only use ingredients that pass all our third-party testing criteria—any ingredient that fails our testing is rejected and not used in our formulas. All ingredient testing reports (COAs) are available upon request by contacting our customer support team at darko@darko.company.

Allergen Information

All Darko products are manufactured in a GMP-certified facility that may process milk, soy, nuts, and wheat. We take strict precautions to prevent cross-contamination, but all our products are labeled with a clear allergen warning for cross-contamination risks.

We offer a range of vegan, gluten-free, and dairy-free formulas—all clearly labeled on our product pages and labels. If you have a specific allergen concern, please contact our customer support team at darko@darko.company for more information.

Our Commitment to Transparency

Transparency is at the core of everything we do—including our ingredients. We believe that you have the right to know exactly what’s in your supplements, and why we use each ingredient. That’s why we list every single ingredient (active and inactive) on our product labels and product pages, with clear information about the source, potency, and benefits of each active ingredient.

If you have any questions about our ingredients, their sources, or their benefits—please contact our customer support team at darko@darko.company. We’re happy to provide you with any information you need to make an informed decision about our products.