Try our at-home blood test
Clinic-level accuracy on 38 key markers. Results and recommendations in just 72h.
120 caps
Pre-order for 09/11/2026, delivery 2–3 working days once available
Healf Zone members get free next day delivery on all orders.
Additional Information:
Food supplements and foods sold by Healf should not be used as a substitute for a varied, balanced diet and healthy lifestyle.
If you are pregnant, breastfeeding, have a medical condition, or are taking any medications, please consult with a healthcare professional before use. Use products only if the seal is intact. Store in a cool, dry place, out of the reach of young children. Do not exceed the recommended daily intake.
We make every effort to ensure that product information on our website is accurate and up to date, but packaging and ingredients may occasionally vary from images shown on site. Please refer to the product label and contact Healf before use if you have any questions regarding your specific allergies or intolerances.
I bought L-Theanine to take alongside Magnesium L-Threonate as it is supposed to aid sleep and cognitive function. I am sleeping better, but I would need to take them for a couple of months before I put it down to these combinations specifically.
To combat brain fog and general fatigue I have been taken one of these each morning with some caffeine and it really takes the edge off the caffeine and helps to avoid any sort of afternoon crash. It gives all I want from the caffeine and helps me avoid all the bad stuff. Taken on its own without any caffeine also shows what a capable supplement it is. I suffer from anxiety and stress and L-theanine really helps to level me out. I also take one an hour before bed in combination with my magnesium glycinate and it really helps to calm me, quieten my 'what can i worry about here in my bed' intrusive night time thoughts and improve my sleep. A real quality product.
Amazing
Reliable and fast delivery great quality 👍
Very good product
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We love people who check ingredients as carefully as we do, so you'll find detailed information about the ingredients used on every product page (where applicable). If you see something you'd like to flag with us or have additional questions, please don't hesitate to get in touch—we'd love to hear from you.
Every product undergoes our rigorous Healf Curation Process, ensuring you are always getting the best when it comes to your wellbeing.
