





Maintaining Muscle
Strawberry-flavoured whey protein powder optimised for sustaining strong muscles after 50.

STRENGTH

NUTRITION

MUSCLE SUPPORT
- Helps build and sustain muscle strength
- Enhanced whey protein powder blend designed for older muscles
- Includes key nutrients for muscle support often lacking in UK diets after 50
From midlife onwards, the body gradually loses muscle mass in a natural process called sarcopenia, at a rate of around one percent per year.
But it doesn’t have to. You don’t need extreme training to maintain your muscle strength for everyday balance and mobility. Regular exercise and good nutrition – especially protein – helps keep muscles strong and capable for steady movement, confidence and independence.
Maintaining Muscle helps you stay strong, balanced and active with a daily blend of protein and nutrients specially formulated to support healthy muscle growth in adults 50+.
It’s easy to mix with water or milk as a strawberry shake, or sprinkle on your favourite cereal.
Builds muscle with whey protein – the richest source of the nine essential amino acids needed to build muscle tissue.
Provides key muscle nutrients missing from 50+ diets – including vitamin D, zinc, potassium, magnesium and calcium for healthy muscle growth and function. Nutrition data shows that most 50+ adults are missing their recommended daily targets for these key nutrients.
Extra support for older muscle health and performance – with added L-Leucine, an amino acid scientifically shown to support muscle maintenance and performance in older adults.
Supports protein digestion – with added lactase, an enzyme that supports whey protein digestion in the older gut.
Includes our Healthy Ageing Blend – with additional nutrients that are often lacking in the diets of the over-50s, but become increasingly important for supporting muscle function, heart health, immune resilience and cellular protection as we age.
Use 35g (two heaped scoops) in 250ml of milk or water for a tasty strawberry shake, or sprinkle on your favourite cereal. Always add the powder to the liquid and mix well.
Take it once or twice a day, with or between meals.
| Micro Nutrient Blend Ingredient |
Per 35g serving | %NRV per 35g serving* |
|---|---|---|
| Vitamin D3 (800IU) | 20µg | 400% |
| Vitamin E | 12mg a-TE | 100% |
| Vitamin C | 160mg | 200% |
| Thiamin | 2.2mg | 200% |
| Riboflavin | 4.2mg | 300% |
| Niacin | 36mg | 225% |
| Vitamin B6 | 5mg | 357% |
| Folic Acid | 200µg | 100% |
| Vitamin B12 | 25µg | 1000% |
| Biotin | 50µg | 100% |
| Potassium | 441mg | 22% |
| Calcium | 266mg | 33% |
| Magnesium | 94mg | 25% |
| Zinc | 7mg | 70% |
| Copper | 1mg | 100% |
| Manganese | 1mg | 50% |
| Selenium | 70µg | 125% |
| Chromium | 30µg | 75% |
| Molybdenum | 10µg | 20% |
| Grape Seed Extract | 25mg | N/A |
| Co-enzyme Q10 | 5mg | N/A |
| BioPerine | 3mg | N/A |
| Macro Nutrient Blend Ingredient |
Per 35g serving | %NRV per 35g serving* |
|---|---|---|
| Whey Protein (80%) | 11.3g | N/A |
| Milk Protein (85%) | 7.1g | N/A |
| Fibre (Inulin) | 2.8g | N/A |
| Flax Seed | 2.0g | N/A |
| Additional L-Leucine | 1.0g | N/A |
| Lactase enzyme (FCC units) | 4,500 | N/A |
* Nutrient Reference Value
| Nutritional Information | Per 100g | Per 35g serving |
|---|---|---|
| Energy KJ | 1190 | 417 |
| Energy Kcal | 354 | 124 |
| Fat (g) Of which saturates |
5.0 0.2 |
1.8 0.1 |
| Carbohydrate (g) Of which sugars (g) |
34.1 4.3 |
11.9 1.5 |
| Fibre (g) | 6.3 | 2.2 |
| Protein | 48.0 | 16.8 |
| Salt (g) | 0.0 | 0.0 |
Whey Protein Concentrate (Milk, Soy), Milk Protein Concentrate, Fructooligosaccharide, Flavouring, Flaxseed, Vitamin/Mineral Premix (Potassium Chloride, Magnesium Bisglycinate, Vitamin C Prep (Ascorbic Acid, Hydroxypropyl Methylcellulose), Magnesium Oxide, Calcium Carbonate, Tri-Calcium Citrate Tetrahydrate, Vitamin B3 (Nicotinamide), Vitamin E Prep (DL-a Tocopheryl Acetate, Modified Food Starch, Silicon Dioxide), Maltodextrin, Vitamin D3 Preparation (Maltodextrin, Starch, Sucrose, Cholecalciferol), Zinc Oxide, Zinc Bisglycinate, Vitamin B6 (Pyridoxine Hydrochloride), Co-Enzyme Q10, Riboflavin, Thiamin (Thiamin Hydrochloride), Bioperine® Black Pepper (Piper nigrum) Extract, Manganese Sulphate, Copper Sulphate, Copper Bisglycinate, Manganese Bisglycinate, Vitamin B12 (Cyanocoblamin, Dicalcium Phosphate), Chromium Picolinate, Folic Acid, Grape (Vitis vinifera) Seed Extract, Sodium Selenate, Biotin, Ammonium Molybdate), Leucine, Colour (Beetroot Red), Thickener (Xanthan Gum), Lactase, Sweetener (Sucralose).
Suitable for vegetarians.
Food supplements should not be used as a substitute for a varied and balanced diet or a healthy lifestyle. If you are pregnant, breastfeeding, taking any medication or are under medical supervision, please consult a doctor or pharmacist before taking supplements. If you suffer any adverse reaction whilst using a supplement, discontinue use and consult your doctor. Keep out of reach of children. Allergens are highlighted in bold within the ingredients list.

Video

Who’s it for?
Maintaining Muscle is for anyone over 50 who wants to maintain muscle strength and stability as they age, alongside regular movement and exercise.
It can be particularly helpful if you’re looking to recover lost muscle strength after a period of inactivity, reduced appetite or recovery from illness.

The Healthy Ageing Blend
Most supplements in the Prime Fifty range include our Healthy Ageing Blend: important vitamins and minerals often lacking in 50+ diets, according to UK diet and nutrition data.
The blend includes vitamin D to support bones, muscles and immunity, B vitamins for energy and a healthy heart, zinc for immune and cognitive support, antioxidants to help protect cells from oxidative stress, and chromium for healthy blood sugar balance. Where possible, these important nutrients are always added, no matter which health area you’re targeting.
Together with BioPerine®, a patented black pepper extract shown to support absorption, these nutrients build a strong foundation for your health as you age.
"From midlife onwards, we naturally begin to lose muscle in a process known as sarcopenia. The research is clear that adequate protein combined with regular exercise becomes increasingly important. That’s why I formulated Maintaining Muscle to provide targeted support for strength, balance and everyday capability."




Protein is needed as the main nutrient for all our muscles, including the heart, but also for other key tissues such as bones, blood and also hormones. Whey protein is considered the ‘best’ protein because it contains the highest proportion of essential amino acids – the ‘building blocks’ for making muscles – which cannot be synthesised in the body. It’s also considered the best protein to combat muscle loss as we age, according to a pan-European study.
L-Leucine is an essential amino acid shown scientifically to contribute to muscle health as we age more than any other. This special amino acid brings additional support to muscle maintenance and performance in older adults.
Nutrition isn't just about what you put into your body, it’s about what your body can actually use. Breaking down and absorbing nutrients from what we eat becomes harder as we age, caused by reduced stomach acid and other factors. That can affect how well we extract vitamins and minerals from both food and supplements.
That’s why we include BioPerine®, a patented extract of piperine from black pepper shown by multiple studies to enhance the bioavailability of a wide range of vitamins, minerals and other nutrients, helping your body put them to use.
Customer testimonials
Dawn F
My overall physical and mental health improved within a few months
We've found the flavour true to strawberry. There are even a few strawberry seeds in there which I quite like. The powder mixes in well- we use milk so it is just like a milkshake. Tasty. We've only been using this for a week so not sure how it is maintaining our muscles.
Matthew G
I believe that it has made some visible difference
Tastes nice, and I believe that it has made some visible difference to mass and tone - although that might very well just be personal vanity on my part! I only take a quarter to a half of the recommended dose as I do get plenty of protein in my diet. I would also say that I exercise quite a lot; but I always have done, so any difference is likely to be a result of the new element - ie this product. Anyway, I'm sufficiently convinced to continue with the subscription. Additionally, although I did initially put on a few pounds, I am now lighter than before, not heavier, despite eating as much as I ever did (a lot).
FAQ
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Yes, we ship all over the world. Shipping costs will apply.
How long until I feel a benefit?
This can vary from person to person, and also depends on the product and the benefit you're looking for. Supplements aren't pharmaceutical drugs, and they won't have an immediate effect.
Some supplements work in the background, delivering long-term health benefits without noticeable short-term differences.
But for most products, the active ingredient in your supplement needs to build up to sufficient levels in the body to begin to have an effect. In general, you should notice a benefit after 4-8 weeks of supplementation.
If you have a question about a specific product, please contact our Customer Care team for more detailed advice. hello@primefifty.com
I’m taking prescribed medication. Can I still take supplements?
If you’re taking any medication or are under medical supervision, please make sure that you consult a doctor or pharmacist before taking any supplements.
How do your subscriptions work and how do I pay for them?
Our subscriptions are designed to make life easier and ensure you never run out of your supplements.
Once subscribed, your order is automatically processed and delivered based on your chosen schedule – every 28 days.
Payments are processed automatically at the start of each subscription cycle, so you don’t need to worry about reordering manually.
You’ll receive a 3-day reminder before each shipment, and our subscriptions are fully flexible – you can amend, pause, or cancel at any time to suit your needs.
From the journal

Why Prime Fifty?
We believe ageing isn’t about limitation. It’s about supporting your body to stay capable, active, capable and independent. Prime Fifty is here to help you live the life you want to live.

What your body needs after 50 that it didn't need before
Living longer sounds good, but living well is what matters. Discover how your nutritional needs change after 50 and what the science says about maintaining strength, clarity and resilience.

Discover our Healthy Ageing Blend
As well as targeted support for your health goals, most Prime Fifty supplements also include our Healthy Ageing Blend – extra vitamins, minerals and nutrients that help to build a strong foundation for your health as you age.