Most people in the UK need 1 to 2 protein shakes a day. The exact number depends on your body weight, fitness goal, and how much protein you already get from food. Use the UK guideline of 0.75g of protein per kg of body weight as your baseline, then add shakes only to fill the gap your diet leaves behind.
If you have been second-guessing whether your current intake is spot on or totally off, you are not alone. This guide cuts through the noise and gives you a clear, practical method to work out the right number for your body and your goals.
What Counts as a Protein Shake?
A protein shake is any drink made by mixing protein powder with water, milk, or a plant-based alternative. The protein can come from several sources, each with a slightly different profile. Whey concentrate is the most widely used and affordable option. Whey isolate goes through extra filtration for a cleaner, higher-protein result per scoop. Plant-based options such as pea, soy, and rice protein are suitable for vegans or those who prefer to avoid dairy.
Most standard protein powders deliver around 20 to 25g of protein per serving. Knowing that figure is important before you start calculating how many shakes you need each day.
How Much Protein Do You Actually Need Each Day? (UK Standards)
Before deciding how many protein shakes to drink, you need to know your daily protein target. This is the number everything else builds from.
According to the British Nutrition Foundation, the recommended intake for healthy adults in the UK is 0.75g of protein per kilogram of body weight per day. For someone weighing 70kg, that works out to around 53g of protein daily, which is easily achievable through food alone.
However, this baseline is a minimum for general health. If you are training regularly, your needs are considerably higher.
Protein needs by goal
| Goal | Protein needed (g/kg body weight) | Example: 70kg person |
|---|---|---|
| General health / maintenance | 0.75g/kg (BNF UK standard) | ~53g/day |
| Weight loss / body recomp | 1.2 to 1.5g/kg | 84 to 105g/day |
| Endurance training (running, cycling) | 1.3 to 1.6g/kg | 91 to 112g/day |
| Muscle gain / strength training | 1.2 to 1.7g/kg (ACSM guideline) | 84 to 119g/day |
| Intense bodybuilding or 2-a-day training | Up to 2.0g/kg | Up to 140g/day |
The further your goal is from basic maintenance, the bigger the gap between what your diet typically provides and what your body actually needs. That gap is exactly where protein shakes come in.
This table shows that anyone training for muscle gain or weight loss needs roughly double the UK minimum. Shakes are most useful for closing this gap efficiently.
The Protein Gap Method: How to Calculate Your Exact Number of Shakes
Rather than guessing, use this simple three-step process to work out how many protein shakes you genuinely need each day.
Step 1: Calculate your daily protein target
Take your body weight in kilograms and multiply it by the figure that matches your goal from the table above. If you weigh 75kg and train for muscle gain, your target is roughly 112 to 128g of protein per day.
Step 2: Estimate protein from your meals
Most UK diets provide between 50 and 70g of protein per day without any supplements. Here is a rough guide to what common foods contribute:
| Food | Typical serving | Protein |
|---|---|---|
| Chicken breast | 150g | ~45g |
| Eggs | 2 large | ~12g |
| Greek yoghurt | 200g | ~20g |
| Semi-skimmed milk | 300ml | ~10g |
| Beans on toast | 1 portion | ~15g |
| Cottage cheese | 100g | ~11g |
| Tuna (tinned) | 100g | ~25g |
Even with protein-rich meals, most people eating a typical UK diet fall 30 to 60g short of what active training requires. This shortfall is where shakes become a practical, efficient solution.
Step 3: Fill the gap with protein shakes
Subtract the protein from your food from your daily target. Divide the remaining amount by the protein per shake (roughly 25g for a standard scoop).
Example for a 75kg male training for muscle gain:
- Daily target: 113g
- From food (3 solid meals): ~65g
- Gap: ~48g
- Shakes needed: 2 (delivering ~50g)
This is the Protein Gap Method. It turns a vague question into a specific, personal answer.
See more: Maximize Strength and Recovery with Applied Nutrition Creatine
How Many Protein Shakes a Day by Goal
The Protein Gap Method gives you a precise number, but it helps to know the general range for each type of goal before you run the numbers.
For muscle gain
People training for muscle gain typically need 1 to 3 protein shakes per day, depending on how active they are and what their diet already provides. A post-workout whey shake is the single most impactful choice, as whey protein is rapidly absorbed and rich in leucine, the amino acid that directly triggers muscle protein synthesis. If you train twice a day or have a very high protein target, a second shake earlier in the day or between meals makes sense.
Explore our full range of whey protein to find the right option for your training.
For weight loss
One to two shakes per day is usually the right range when losing weight. Protein helps with satiety, meaning you feel fuller for longer and are less likely to reach for high-calorie snacks. A shake between meals or replacing a light meal can reduce total calorie intake without leaving you hungry. Keep in mind that shakes should supplement your diet, not replace balanced meals entirely.
For general health and maintenance
If you eat a reasonably balanced diet with regular protein-rich meals, you may only need one shake on training days, or none at all on rest days. The key question is always whether your food intake already covers your daily target.
Training Day vs. Rest Day: Does the Number Change?
This is one of the most overlooked questions in protein nutrition, and virtually no mainstream guide addresses it directly. The answer is yes, your needs do shift slightly depending on whether you trained that day.
| Training day | Rest day | |
|---|---|---|
| Protein needs | Higher (muscle repair underway) | Slightly lower |
| Shakes recommended | 1 to 2 | 0 to 1 |
| Most important timing | Within a few hours post-workout | Any time across the day |
| Total daily target | Full target applies | Can reduce by roughly 10 to 15% |
On rest days, your muscles are still in recovery mode, particularly in the 24 to 48 hours after a hard session. Protein remains important, but the urgency around timing decreases. One shake spread across a rest day is usually plenty.
What Type of Protein Shake Should You Use?
The number of shakes you need is only half the picture. The type of protein matters too, because different forms are better suited to different times of day and different goals.
Whey protein: best around training
Whey is fast-digesting and rich in BCAAs, making it the go-to choice for post-workout nutrition. It absorbs quickly and delivers amino acids to your muscles when they need them most. Browse our whey protein collection for a wide range of options suited to every training goal.
Casein protein: best before bed
Casein digests slowly over several hours, releasing a steady stream of amino acids throughout the night. It is particularly useful if your second shake falls in the evening, as it supports overnight muscle recovery without requiring an extra meal. You can find casein options in our casein protein range.
Plant protein: best for vegan and dairy-free diets
Plant-based proteins such as pea, soy, and rice are excellent alternatives for those who avoid dairy. A quality blend using multiple plant sources will deliver a complete amino acid profile comparable to whey. Our plant protein collection covers a wide range of options, from single-source to blended formulas.
Can You Have Too Many Protein Shakes? What to Watch Out For
There is no hard rule that makes drinking three or four shakes a day dangerous for a healthy person. However, consistently going above what your body actually needs comes with a few practical downsides worth knowing.
The first concern is excess calories. Each shake adds roughly 100 to 150 calories depending on the product and what you mix it with. If your total calorie intake already meets your needs, adding additional shakes pushes you into a surplus, which leads to fat gain over time.
The second issue is crowding out whole foods. Shakes are convenient but nutritionally incomplete compared to a real meal. Whole foods provide micronutrients, fibre, and a range of compounds that protein powder does not replicate. If shakes start replacing meals rather than supplementing them, overall diet quality tends to drop.
The kidney concern that often comes up is worth addressing directly. For healthy adults with no pre-existing kidney issues, current evidence does not support the idea that a high protein intake from shakes causes kidney damage. If you have a kidney condition or any concerns about your health, speak with your GP before making significant changes to your protein intake.
A good rule of thumb: if the number of shakes you are drinking each day exceeds the gap calculated in Step 3 above, you are likely getting more than you need.
Browse our most popular proteins to find a quality option that fits your daily routine.
Frequently Asked Questions
How many protein shakes a day should a beginner have? Start with one shake per day, ideally after your workout. Focus on building consistent training habits and eating balanced meals first. As your training intensity increases, you can reassess whether a second shake is needed.
Can I drink 3 protein shakes a day? Yes, if your protein gap genuinely requires it. A 100kg athlete training twice a day may legitimately need 3 shakes to hit their daily target. For most people training 3 to 5 times per week, 1 to 2 is sufficient.
Is it OK to have a protein shake on rest days? Yes. Your muscles are still recovering on rest days, so protein remains important. One shake is usually enough on a rest day, and timing is less critical than on training days.
Can protein shakes replace meals? No. Shakes work best as supplements to balanced meals, not replacements. They lack the fibre, vitamins, and variety of whole foods your body needs for long-term health.
How many protein shakes a day for a woman? The calculation is the same as for men: base it on body weight and goal. The BNF recommends 0.75g/kg for general health. Women training for muscle gain or weight loss will typically need 1.2 to 1.5g/kg, which often means 1 to 2 shakes per day depending on dietary protein intake.
Does it matter when I drink my protein shake? Spreading your protein intake across the day is more important than hitting a precise window. Post-workout is a reliable and practical time for most people. Research suggests the overall daily total matters more than the exact timing of each shake.
Can too many protein shakes damage your kidneys? For healthy adults with no kidney conditions, current evidence does not support this concern. If you have existing kidney issues, consult your GP before increasing your protein intake significantly.
How many protein shakes a day if I am vegan? The target is the same, but the source changes. Look for a plant protein blend with a complete amino acid profile. You may need to check the protein content per serving, as some plant proteins deliver slightly less per scoop than whey.
Conclusion
The right number of protein shakes per day is not one-size-fits-all. For most people in the UK, 1 to 2 shakes a day fills the gap between what your diet provides and what your training demands. Use the Protein Gap Method to get a specific number, choose the right type of protein for the time of day, and let whole foods do the heavy lifting the rest of the time. Ready to find the right protein for your goals? Explore our full range of whey, casein, and plant-based proteins at MyGymSupplements.
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