Maximum GSE Liquid Concentrate
Maximum strength grapefruit seed extract to support immune health and natural defences.
£17.99
Free sample each month
Pause or cancel anytime
365 day free returns
Back in stock: 15/05/2025
Buy now, pay later from £5.00/mo with
Free UK shipping over £50, free returns.
Key Benefits
-
Promotes immune health.
-
Source of natural antioxidants.
-
High-strenght liquid formula.
-
Vegan, gluten-free, and non-GMO.
NutriBiotic® Maximum GSE Liquid Concentrate provides a high-potency dose of grapefruit seed extract, derived from the seed and pulp of the grapefruit. This formula delivers the strongest concentration in the NutriBiotic range, using Citricidal®—a blend of 60% grapefruit seed extract and 40% vegetable glycerin.
Naturally rich in bioflavonoids and polyphenols, grapefruit seed extract is valued for its antioxidant and antimicrobial properties. It’s also often used to support immune health and help maintain natural defences, especially during seasonal shifts or times of stress.
Free from gluten, GMOs, and animal ingredients, this vegan-friendly liquid formula offers clean, concentrated support for everyday wellbeing.
Nutribiotic has been a trusted name in wellness for over 40 years. Founded on the belief that good health should be accessible to all, this family-owned California brand offers high-quality nutritional supplements and personal care products. The brand is known for its commitment to clean, effective formulas, all made with carefully selected ingredients and designed to help their customers live happier, and healthier lives.
With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.
Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.
CITRICIDAL [citrus paradisi (grapefruit) seed extract and glycerine (vegetable).
Vegan • Gluten Free • Made without: GMOs, milk, soy, eggs, yeast, wheat, corn, rose hips, peanuts, tree nuts, fish, crustacean shellfish, animal products, fillers, binders, lubricants, starch, sweeteners, colorings, flavorings, and preservatives.
Shipping
At Healf, we prioritize safe and fast delivery for all our customers. Our carefully selected couriers are Royal Mail and DPD.
UK standard delivery
Enjoy free standard delivery on orders above £50, this option usually requires 2-3 working days. If your order is under £50, this delivery option is available for £3.99.
Next working day
For when you need our products urgently, we offer next working day shipping for £5.99. For orders placed before 12.00, we will ship it the same day to ensure you receive your order the next working day.
International
International deliveries can take 7 working days, and up to 4 weeks. The cost is £22.99 for orders below £50, £49.95 for orders above.
Returns
If for any reason you are not satisfied with your order, we provide free 365-day UK returns for all our customers. To initiate your return, simply contact us at team@healf.com, and we'll send you a return slip and help arrange a collection. The item you return must be sent in the same condition as received and inside the original packaging. Once received, we will notify you via email.
For international returns, we unfortunately do not cover the cost. However, we work with an array of carriers and can offer self-posting returns for customers shopping from outside the UK.
Dilute 1 drop of Maximum GSE in a minimum of 1 fluid ounce of water. FOR EXTERNAL USE ONLY!
WARNING: KEEP OUT OF REACH OF CHILDREN. ALWAYS DILUTE! DO NOT USE FULL STRENGTH. DO NOT PUT IN EYES. AVOID ALL CONTACT WITH SENSITIVE AREAS. IF FULL STRENGTH CONTACT OR IRRITATION OCCURS, FLUSH WITH WATER FOR AT LEAST 10 MINUTES. IRRITATION IS TEMPORARY AND MAY LAST UP TO 48 HOURS.
You may also like
Shop by collection
Frequently asked questions
Every product undergoes our Healf Curation Process. With it, you can shop confidently knowing that every item has been tried and tested before it reaches you. Our Healf Curation Process includes three key steps: Brand Discovery, Expert Validation, and Community Testing. Through these, we assess quality, ingredients, effectiveness, and more, ensuring that every product empowers your wellbeing.
The Healf Journal offers detailed insights into different aspects of wellbeing, as well as guidance, research, recipes, and more to help you invest in your personal wellbeing journey. You can also subscribe to our weekly newsletters for the latest updates at Healf and in the wellbeing industry. Subscribe via the sign-up block at the bottom of this page.
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.
New
New
100+ health markers.
Two annual at-home blood tests.
Personalised product recommendations.
Learn more
Healf Curation
Process™
Every product undergoes our rigorous Healf Curation Process, ensuring you are always getting the best when it comes to your wellbeing.
Discover more
The Discovery
Expert Validation
Community Testing