ProLon’s revolutionary Fasting Mimicking Nutrition Technology delivers the transformative power of fasting without complete food deprivation. Developed through decades of research at the Longevity Institute of the University of Southern California, this precision nutrition formulation nourishes the body while keeping metabolic processes in fasting mode. Unlike traditional fasting, it provides essential nutrients while triggering cellular rejuvenation and metabolic reset. Backed by over 32 clinical trials at leading research institutions, including Stanford, Mayo Clinic, and the University of Miami, ProLon’s fasting programme supports longevity, enhances metabolic health, and promotes overall wellbeing.

ProLon is redefining the science of fasting with cutting-edge nutrition designed to support long-term health. Founded by Dr. Valter Longo, a world-renowned longevity expert and Director of the Longevity Institute at USC, the brand emerged from a mission to harness the power of fasting for disease prevention and cellular renewal. Through over 20 years of scientific research, ProLon continues to pioneer the field of longevity-focused nutrition, making fasting more accessible while advancing the concept of food as medicine.

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.

Soups:
Minestrone Soup Mix: Potato flakes, Rice flour, White beans, Peas (dried), Carrots (dried), Chicory root fibre, Sea salt, Onion (dried), Leeks (dried), Cabbage (dried), Olive oil (olive oil, potato starch, rosemary extract), Tomato (dried), Celery, Yeast extract, Spinach (dried), Parsley (dried), Turmeric.

Tomato Soup Mix: Rice flour, Tomato (dried), Chicory root fibre, Onion (dried), Sea salt, Olive oil (olive oil, potato starch, rosemary extract), Whole grain brown rice, Yeast extract, Basil (dried), Parsley (dried)

Green Pea & Chives Soup Mix: Green pea flour, Onion powder, Rice flour, Rice starch, Extra virgin olive oil, Chicory root fibre, Salt, Yeast extract, Chives (dried), Garlic powder, Spinach (dried).

Carrot Ginger Soup Mix: Navy bean flour, Rice flour, Rice starch, Carrots (dried), Salt, Extra virgin olive oil, Chicory root fibre, Yeast extract, Onion powder, Celery seeds, Ginger extract, Paprika.

Chickpea & Leeks Soup Mix: Rice flour, Chickpeas (dried), Onion powder, Rice starch, Leeks (dried), Chicory root fibre, Salt, Extra virgin olive oil, Yeast extract, Turmeric, Rosemary (dried), Bay leaves.

Lentil Curry Soup Mix: Rice flour, Rice starch, Carrot (dried), Lentils (dried), Salt, Extra virgin olive oil, Chicory root fibre, Onion powder, Yeast extract, Navy bean flour, Curry, Paprika, Celery seeds.

Red Pepper & Onion Soup Mix: Rice flour, Red bell pepper (dried), Rice starch, Chicory root fibre, Salt, Tomato (dried), Extra virgin olive oil, Onion powder, Yeast extract, Basil (dried), Natural flavour.

L-Drinks:
L-Drink Tropical Berry Flavor: Purified water, Vegetable glycerin, Natural flavours, Citric acid, Potassium sorbate (to protect freshness).

L-Drink Orange Flavor: Purified water, Vegetable glycerin, Natural flavours, Citric acid, Potassium sorbate (to protect freshness).

Teas:
Hibiscus Herbal Tea: Organic hibiscus leaves

Spearmint Herbal Tea: Organic spearmint leaves

Spearmint Lemon Herbal Tea: Organic spearmint leaves, Organic lemon peel, Organic lemongrass

Nut-Bars:
L-Bar Choco Crisp: Inulin, Almond butter, Brown rice crispy, Cocoa powder, Almonds, Chocolate chips (cane sugar, unsweetened chocolate, cocoa butter), Rolled oats, Brown rice syrup, Flaxseed oil, Rice dextrin, Grape juice, Salt.
Contains: Almonds.

L-Bar Nut-Based: Macadamias, Honey, Pecans, Almonds, Almond butter, Coconut, Chicory root fibre, Flaxseed, Coconut oil, Coconut flour, Sea salt, Natural flavour, Mixed tocopherols (vitamin E), Citric acid, Ascorbic acid.
Contains: Almonds, Coconut, Macadamia nuts, Pecans.

Snacks:
Almond & Kale Crackers: Almonds, Sesame seeds, Tapioca flour, Chia seeds, Flax seeds, Sunflower oil, Kale, Sea salt, Coconut sugar, Coconut vinegar, Onion, Chili pepper, Cumin seed, Black pepper, Mixed tocopherols (vitamin E), Garlic, Oregano, Citric acid.
Contains: Almonds, Coconut.

Kale Crackers: Almonds, Sesame seeds, Tapioca flour, Chia seeds, Flax seeds, Sunflower oil, Kale, Sea salt, Coconut sugar, Coconut vinegar, Onion, Chili pepper, Cumin seed, Black pepper, Mixed tocopherols (vitamin E), Garlic, Oregano, Citric acid.
Contains: Almonds, Coconut.

Olives with Herbs: Green olives, Sea salt, Extra virgin olive oil, Parsley, Oregano, Rosemary.
May contain pits or pit fragments.

Olives with Sea Salt: Olives, Extra virgin olive oil, Sea salt.
May contain pits or pit fragments.

Supplements:
Algal Oil Omega-3 Dietary Supplement: Hypromellose, Silicon dioxide, Water.

NR-1 Vegetable Powder with Vitamins & Mineral Supplement: Vitamin A (Beta Carotene), Vitamin C (Ascorbic Acid), Vitamin D (Cholecalciferol), Vitamin E (DL-Alpha Tocopherol Acetate), Vitamin K (Phytonadione), Thiamin (Thiamine Mononitrate), Riboflavin, Niacin (Niacinamide), Vitamin B6 (Pyridoxine HCl), Folic Acid, Vitamin B12 (Cyanocobalamin), Biotin, Pantothenic Acid (Calcium-D-Pantothenate), Calcium (Calcium Carbonate, Tribasic Calcium Phosphate), Iron (Ferrous Fumarate), Phosphorous (Tribasic Calcium Phosphate), Iodine (Potassium Iodide), Magnesium (Magnesium Oxide), Zinc (Zinc Oxide), Selenium (Sodium Selenate), Copper (Cupric Sulfate), Manganese (Manganese Sulfate), Chromium (Chromium Picolinate), Molybdenum (Sodium Molybdate). Beet root, Spinach leaf, Tomato fruit, Carrot root, Collards leaf, Kale leaf.
Other Ingredients: Stearic acid, Microcrystalline cellulose, Dicalcium phosphate, Croscarmellose sodium, Magnesium stearate, Silicon dioxide, Food-grade shellac.

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.

The diet should be used for five consecutive days, after which the individual will transition on the 6th day and then resume their normal diet. The programme provides a meal card that recommends how to consume the items for each day, but each day’s items can be consumed in any order you wish, as long as you only eat each day’s items during that day (do not carry them over to the next).

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.