Certified Grass-fed Whey Protein Isolate
Certified Grass-fed Whey Protein Isolate
Cleanest Protein Powder
Protein powder that actually delivers what it promises. 27g of grass-fed whey from Irish pastures, pure protein that your body can actually use.
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Unmatched Purity and Ethical Sourcing
Our protein is tested by independent third parties to ensure unmatched purity, safety, and effectiveness. Additionally, Centenarius proudly holds an Animal Welfare Certificate, proving our commitment to ethical sourcing from pasture-raised, grass-fed cows in Ireland.
Ingredients
Ingredients
100% Certified Grass-fed Whey Protein Isolate. <1% Non-GMO Sunflower Lecithin.
*Contains: Milk
Processing Method
Processing Method
Utilizing patented ice-cold cross-flow microfiltration, this whey protein isolate removes all fat, carbs, and lactose while retaining native and undenatured proteins for easy digestion and absorption.
How to Enjoy?
How to Enjoy?
Mix one serving (30 grams) 2 scoops with 8-10oz. of your favorite milk or water.
Store in a cool and dry place.
Why Centenarius?
Why Centenarius?
Centenarius offers the purest protein sourced from Irish grass-fed, pasture-raised animals. Our commitment to sustainability, animal welfare, and product purity ensures a clean, effective, and ethical protein choice.
Native &
Undenatured
Heavy Metals
Tested
No Artificial
Flavors/ Colors
No Growth
Hormones
Easily
Digestible
Cold
Filtered
Animal Welfare
Certified
Comprehensive Benefits
Performance
Unlock Your Peak Potential
Recovery
Bounce Back Faster, Stay Consistent
Clarity
Think Clearer, Focus Longer
Vitality
Feel Younger, Move Better
Let customers speak for us
This whey protein is an absolute game-changer for anyone serious about building muscle and recovering faster. It blends perfectly in just a shaker bottle with water or milk, creating a silky-smooth texture with no gritty residue or chalky aftertaste. With high-quality protein per serving, minimal fillers, and noticeable improvements in strength, energy, and muscle gains, it’s easily become my go-to supplement that delivers real results.
I like that this supports both mood and sleep. I feel more balanced during the day and more relaxed at night. No grogginess in the morning, which was important for me.
I’ve tried magnesium before and never really felt much but this one is different. I sleep deeper and wake up more refreshed. It’s subtle but noticeable. I wish it was just 2 capsules per day tho.
I’ve struggled with feeling bloated and ‘stuck’ for a while. I didn’t want anything harsh so I tried this. It work but in a very gentle way. Within a week I felt lighter, less bloated and just more comfortable overall. Will continue using.
I’ve had this annoying knee discomfort for years, especially after long walks or workouts. I started taking marine collagen mainly for skin, but around week 4–5 I realized my joints felt… different. Less pressure, less stiffness. It’s subtle but very real. I didn’t expect that benefit at all.
I love this product and use it nightly about an hour before bed. It allows me to fall asleep and stay asleep.
I was surprised at how clean the ingredients are an incredibly calming. I take half a scoop in the morning and half a scoop in the evening along with the magnesium capsules.
I am very satisfied with my choice of protein, the only thing I am interested in is that I would like to have some proven certificates that have been verified by testing laboratories.
Best regards
Wow. Really does magic. Gentle, effective and honestly the only thing that keeps my digestion regular without bloating or discomfort. Clean ingredients, no cramps, no drama. Love it.
Started on the product 14 days ago. Great results. Love it in my morning coffee.
The New Gold Standard
| Features | Centenarius Protein Powder | Other Protein Powder |
|---|---|---|
| Grass-fed Sourcing |
|
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| Ice-cold Filtration |
|
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| Zero Bloating |
|
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| Clean Ingredients |
|
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| 27g of Pure Protein |
|
|
The New Gold Standard
Grass-Fed Sourcing
Ice-Cold Filtration
Zero Bloating
Clean Ingredients
27g of Pure Protein
Centenarius Protein Powder
Normal Protein Powder
How to Enjoy
Step 1: Scoop out one serving of Centenarius Protein Powder
Step 2: Add 8 to 10 oz of your favorite Milk or Water
Step 3: Shake or Stir Well and Enjoy
Step 1: Scoop out one serving of Centenarius Protein Powder
Step 2: Add 8 to 10 oz of your favorite Milk or Water
Step 3: Shake or Stir Well and Enjoy
Fuel Your Workouts and Recovery
Boost performance and recovery with our fast-absorbing Whey Protein Isolate. Each serving packs 27g of pure protein to build lean muscle and aid in weight management, all with zero bloating.
Our protein is Certified Grass-Fed and sourced from Ireland. It's filtered using a patented, ice-cold process to ensure it's free of heavy metals and hormones, and is lactose-free. It's the clean, easily digestible fuel you need for your fitness goals.
Frequently Asked Questions
Is your protein powder safe for pregnant women?
Is your protein powder safe for pregnant women?
Yes, our protein powder is made from the highest-quality ingredients with no fillers or additives. Whey is generally considered safe during pregnancy, but it's always best to consult with your healthcare provider before adding supplements to your diet.
Is WPI (Whey Protein Isolate) safe for kids?
Is WPI (Whey Protein Isolate) safe for kids?
Yes, protein powder provides similar benefits to kids as it does for adults. However, protein powder should not replace whole food protein sources in a child’s diet. Consult with a pediatrician to determine the proper dosage based on age and nutritional needs.
Whey Isolate vs. Whey Concentrate: What’s the difference?
Whey Isolate vs. Whey Concentrate: What’s the difference?
Whey isolate has a higher protein content and lower amounts of lactose and fat, as it undergoes more filtration than whey concentrate, which contains more lactose, fat, and carbohydrates.
How much protein should I consume daily?
How much protein should I consume daily?
Protein needs vary by age, weight, activity level, and health status. A general guideline is 0.8 grams of protein per kilogram of body weight, or 10-35% of daily calories from protein. Use our protein calculator for personalized recommendations.
What are the benefits of Whey Isolate?
What are the benefits of Whey Isolate?
Whey protein isolate supports muscle growth, recovery, and performance, aids in weight management, and provides a convenient protein source.
Can protein powder help with weight loss?
Can protein powder help with weight loss?
Yes, protein powder can promote satiety, preserve lean muscle, and support balanced nutrition when used as part of a healthy lifestyle.
How should protein powder be consumed?
How should protein powder be consumed?
Mix it with water, milk, or other liquids, or add it to smoothies, shakes, or recipes. Follow the serving size on the label.
What makes Centenarius Protein the best?
What makes Centenarius Protein the best?
It’s lactose-free, soy-free, sugar-free, made from pasture-raised animals, and tested for heavy metals. Our unsweetened whey isolate contains no additives or fillers, resulting in zero bloating or aftertaste.
What’s the difference between grass-fed in the USA vs. Ireland?
What’s the difference between grass-fed in the USA vs. Ireland?
In Ireland, any product labeled "Grass-fed" must be at least 90% grass-fed, a standard not guaranteed in the U.S.
What makes Ireland so special for dairy?
What makes Ireland so special for dairy?
Ireland's soil rests on limestone bedrock, meaning no chemical rebalancing is needed. Glyphosate is banned, making it one of the cleanest places for dairy production.
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