Zinc picolinate and Iron bisglycinate: interaction, severity and spacing
Zinc picolinate and Iron bisglycinate interact because zinc and iron are both absorbed through DMT1 and compete directly, which is why each can blunt the other when taken together. Take them 2 hours apart. Moderate risk.
The interaction in detail
| Pair | Zinc picolinate and Iron bisglycinate |
|---|---|
| Type | Nutrient interaction |
| Severity | Moderate |
| Required spacing | 2 hours minimum |
| Onset | At the time of dosing |
Mechanism
Zinc and iron are both absorbed through DMT1 and compete directly, which is why each can blunt the other when taken together.
What to do
Separate zinc and iron by at least 2 hours. If you need both at high doses, take iron in the morning and zinc in the evening.
How to fit both into one day
Zinc taken with food reduces nausea but phytates block it, so use a chelated form. Sustain high doses only alongside copper.
Non-heme iron absorbs best on an empty stomach with vitamin C. Coffee, tea and calcium can halve absorption, so keep them two hours away.
Putting Zinc picolinate in the evening and Iron bisglycinate in the morning satisfies the 2-hour separation without disrupting either one's absorption window.