Proferrin
Highly bioavailable heme iron.
Dose & timing
- 10.5 mg — morning (and again at dinner)
- 10.5 mg — with dinner
Why it appeared in the archived stack
Heme iron polypeptide absorbs ~10× better than ferrous sulfate, isn't blocked by phytates / calcium / coffee, and rarely causes the constipation/nausea of non-heme iron. Bryan splits 2× daily because heme iron has a saturable absorption curve.
Second daily dose. Heme iron has a saturable absorption curve — splitting 21 mg total into two ~10 mg doses absorbs more than one large dose.
Caveats
- Sex-sensitive: men with normal ferritin generally shouldn't supplement iron (overload risk). Menstruating women may need more. Test ferritin before starting.
- Take apart from calcium, coffee/tea, and zinc — they block iron absorption.
Where to buy on Amazon
| United States (Amazon.com) | Buy on Amazon.com ✓ direct ASIN mapped |
| United Kingdom (Amazon.co.uk) | Buy on Amazon.co.uk ✓ direct ASIN mapped |
| Germany (Amazon.de) | Buy on Amazon.de ✓ direct ASIN mapped |
| France (Amazon.fr) | Buy on Amazon.fr ✓ direct ASIN mapped |
| Spain (Amazon.es) | Buy on Amazon.es ✓ direct ASIN mapped |
| Italy (Amazon.it) | Buy on Amazon.it ✓ direct ASIN mapped |
| Poland (Amazon.pl) | Buy on Amazon.pl ✓ direct ASIN mapped |
Related supplements
FAQ
Where can I buy Proferrin?
Proferrin is available on Amazon in the US, UK, Germany, France, Spain, Italy and Poland. This page links each marketplace directly — to a mapped product listing where one exists, otherwise to a targeted Amazon search built from the product, dose and brand hint. A mapped ASIN verifies only the link target, not purity, quality, stock or suitability.
What dose of Proferrin appeared in the January 2024 protocol?
10.5 mg — morning (and again at dinner); 10.5 mg — with dinner.
Why did Proferrin appear in the archived stack?
Heme iron polypeptide absorbs ~10× better than ferrous sulfate, isn't blocked by phytates / calcium / coffee, and rarely causes the constipation/nausea of non-heme iron. Bryan splits 2× daily because heme iron has a saturable absorption curve.