Advanced selenium support for antioxidant & thyroid balance
Support your defences and vitality with Metabolics Tri Selenium. This advanced formula combines three forms of selenium to promote healthy thyroid function, cellular protection, and immune balance. Thoughtfully designed for optimal absorption, it provides daily micronutrient support for lasting resilience and well-being.

Supplement Facts
Supplement Facts
Each capsule contains:
%NRV*
Total Selenium
196 mcg
356%
[Equal amounts of Selenium from:
Methylselenocysteine (MSC)
L Selenomethionine & Sodium Selenate]
† Nutrient Reference Value (NRV*) not established
Ingredients
Ingredients
Cellulose, Hydroxypropyl Methylcellulose (capsule), Dicalcium Phosphate, Methylselenocysteine, L Selenomethionine, Sodium Selenate.
Directions / Dosage
Directions / Dosage
Recommended dose 1 capsule per day before food. The stated recommended dose can be changed as directed by your healthcare practitioner. Do not exceed this recommended dose. Consume within 3 months of opening.
Warning
Warning
If pregnant or breast feeding, consult your healthcare practitioner before using. Adult use only. This product should not be used as a substitute for a varied diet.
Storage
Storage
Store in a cool, dry place out of reach of children.
Product Type
Product Type
Serving Size: 1 capsule
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Our quality promise to you
Quality and purity are central to our approach at Metabolics. Each ingredient is carefully selected and rigorously assessed to ensure our supplements meet exacting quality standards.
- High-purity ingredients, selected to meet exacting standards
- No unnecessary binders, flowing agents, caking agents or fillers
- Manufactured and quality controlled at our UK production facility
- Clean-room environments to support consistency and quality
- Produced in line with GMP and HACCP frameworks
- Chosen and recommended by healthcare professionals

One of the best companies I have bought products from. Their products are always high quality (my 6 monthly bloodwork proves this) and the liquid options they offer make taking them really easy.
P Day
Metabolics is always my 'go-to' company for supplements because I fully trust quality & purity of the ingredients they source to make the supplements. Also, I value the prompt response and advice they provide if I'm unsure exactly which variation of a particular vitamin or other supplement to buy.
D McHaffie
As a professional nutritional therapist for 30 years using Metabolics supplements, know how and training they are 5 star quality. Always a friendly helpful voice when ordering and prompt delivery. Top marks in all departments. If I need advice there’s is my go to phone number. The best out there.
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Great supplements are only part of the experience. Our customers value the care, consistency and support they receive from Metabolics, and their feedback plays an important role in how we continue to improve and evolve.