SO, is it from horses or cows, and what country are these animals in and what is the processing to get this supplement? what are the animals fed?

I do not know the answers to those very good questions. I believe the patient should ask their doctor if taking Ferritin itself will increase serum Ferritin levels. Usually, one takes an iron supplement and that will lead to an increase in Ferritin which represent your body's stores of iron. If the patient is looking for relief of RLS...Restless Legs Syndrome...43% of RLS is caused by low Ferritin levels in the brain. Dr. Holder

I wouldn't think so being from bovine spleen

What is the difference between cr bioavailable ferritin and just cr ferritin?

In the small print it says bioavailable iron. I have low ferritin. I took this for one month. It did not raise my ferritin level. I am relatively certain it would be a good iron supplement. And you need iron for your body to make ferritin. Not so sure your body can absorb ferritin orally and not so sure this product contains Ferritin even though that is the name just like Half&Half is not 50/50 cream and milk. I believe this is an iron supplement.

Is stated in the product description on website: is a 5 mg iron supplement naturally isolated from bovine spleen. This scientifically-designed formula is free of corn, soy, yeast and wheat.

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Cardiovascular Research Ecological Formulas - Ferritin Bioavailable Iron 5 mg - 60 Caps

Product ID: 373062927

Details

Brand
Research
Flavour
Unflavored
Item form
Capsule
Primary supplement type
Iron
Unit count
60 Count

🌿Soy, gluten, wheat & corn free formula

🩸5 mg bioavailable iron per capsule

🛡️Natural ferritin for superior iron storage

Description

🩸 Elevate your iron game—store smart, feel unstoppable!

CLEAN PURE FORMULA - Free from soy, gluten, wheat, and corn—ideal for sensitive, health-conscious professionals.
SUSTAINED IRON STORAGE - Supports long-term iron reserves by mimicking your body's own iron storage protein.
OPTIMIZED IRON ABSORPTION - Harnesses natural ferritin from bovine spleen for maximum bioavailability without GI discomfort.
CLINICALLY RELEVANT DOSAGE - Delivers a precise 5 mg dose per capsule, perfect for maintaining optimal iron levels.
TRUSTED QUALITY REPUTATION - Backed by Cardiovascular Research with 4.6-star rating and thousands of satisfied users.

Cardiovascular Research Ecological Formulas Ferritin Bioavailable Iron provides 5 mg of highly absorbable iron per capsule using natural ferritin derived from bovine spleen. Designed to enhance iron storage without common side effects like nausea, this soy- and gluten-free supplement supports sustained iron levels critical for oxygen transport, energy, and overall vitality. Trusted by thousands, it’s a clean, effective choice for professionals seeking long-term iron balance.

Specifications

ASIN	B003NE4BKU
ASIN	B003NE4BKU
Age Range Description	Adult
Best Sellers Rank	#28,173 in Health ( See Top 100 in Health ) #7,181 in Diet & Nutrition
Brand Name	Cardiovascular Research
Customer Reviews	4.6 4.6 out of 5 stars (407)
Customer reviews	4.6 4.6 out of 5 stars (407)
Diet Type	Gluten Free
Flavor	Unflavored
Is Discontinued By Manufacturer	No
Item Form	Capsule
Item Weight	0.01 Ounces
Item model number	EC0100
Manufacturer	Cardiovascular Research
Manufacturer	Cardiovascular Research
Manufacturer Part Number	EC0100
Material Type Free	soy free,wheat free,corn free,gluten free
Model Number	EC0100
Number of Items	1
Primary Supplement Type	Iron
Product Benefits	Iron Support
Product Dimensions	5.08 x 5.08 x 10.16 cm; 0.28 g
UPC	087614992310
Unit Count	60 Count

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