Protein Shakes for Beginners: Do You Need Them?

Start training and it can feel like a tub of protein powder is the price of entry. The truth is simpler and cheaper. A protein shake is just a quick, convenient source of protein. For some beginners it is genuinely useful. For plenty of others, a normal diet already covers it. This guide will help you work out which camp you are in, what to buy if you do want one, and which myths to ignore.

What is a protein shake, really?

A protein shake is protein powder mixed with water or milk. The powder is usually made from milk (whey or casein) or from plants (soy, pea, rice or a blend), with flavouring and sweetener added. There are also ready-to-drink bottles, which are convenient but usually cost more per serving than powder you mix at home.

There is nothing in a shake that you cannot get from food. Its advantages are speed, portability and a lot of protein for relatively few calories. Its downsides are cost, taste, and the fact that a drink is less filling than a meal.

How much protein do you actually need?

The UK reference intake for adults is 0.75 g of protein per kg of bodyweight a day. That is a baseline for general health, not a target for people who train. For building or keeping muscle, sports nutrition researchers commonly suggest around 1.4 to 2.0 g per kg a day for most people who exercise regularly.

So someone who weighs 70 kg and trains a few times a week might aim for roughly 100 to 140 g a day. Spread over three meals and a snack, that is around 25 to 35 g each time. If you already eat a palm-sized portion of protein food at each meal, you may well be close without trying. We cover targets in more depth in our other protein guides, so here we will focus on where shakes fit in.

When does a protein shake actually help?

A shake is a tool for closing a gap. It makes the most sense when one of these sounds familiar:

• You regularly fall short. If you log your food for a few days and keep landing well under your target, a daily shake is an easy fix.
• You have no appetite after training. Many people cannot face a meal straight after a hard HIIT session or a long run. A drink often goes down more easily.
• Your days are chaotic. A shake in your bag between the office and an evening session beats a vending machine.
• You are eating in a calorie deficit. Protein powder gives a lot of protein for relatively few calories, which can help when you are trying to lose fat while keeping muscle.
• You eat a plant-based diet. Hitting a higher target from plants alone is doable but takes more planning, and a plant powder can make it easier.

When is food enough?

If your meals already include a decent portion of protein, a shake adds nothing magic. Whole foods also bring fibre, vitamins and minerals, and they keep you fuller for longer. Here is how a scoop compares with everyday foods. Figures are approximate and vary by product, so check the label.

A pot of Greek yoghurt or a tin of tuna gets you about as far as a scoop of powder. If those foods fit your day, you are not missing out by skipping the shake.

Whey, casein or plant: which type should you choose?

Most powders fall into a handful of types. None is a bad choice. The best one is the one you will actually drink and that suits your diet and stomach.

Why blends? Pea protein is relatively low in one essential amino acid (methionine) and rice protein is low in another (lysine). Together they cover each other. Plant proteins also tend to contain a little less leucine, the amino acid most linked to switching on muscle building, so a slightly bigger scoop can help close the gap.

What should you look for on the label?

Ignore the marketing on the front of the tub and turn it around. Five things matter:

• Protein per serving and per 100 g. Per serving tells you what you get in one scoop. Per 100 g lets you compare products fairly, because scoop sizes vary.
• A short ingredients list. Ingredients are listed by weight, heaviest first, so the protein source should come first. Be wary if cheap added amino acids such as glycine or taurine appear near the top. This is sometimes called amino spiking, and it can make the protein figure look better than it is.
• Sugar and calories. Some powders, especially mass gainers, add a lot of sugar and calories. That is fine if you want them, but know what you are buying.
• Independent batch testing. Supplements are not checked like medicines. A logo from an independent scheme that tests batches for banned substances is a good sign of quality control.
• Allergens. Milk and soy are common, and some powders are made in factories that also handle nuts or gluten.

One more label tip. In the UK, a food can only claim to be high in protein if at least 20% of its energy comes from protein. That bar is easy for a powder to clear, but it also means a high-protein bar or cereal can still be mostly sugar and fat. Read the numbers, not the badge.

Does it matter when you drink it?

Less than the gym folklore suggests. Here are the common timing myths and what the evidence broadly says.

• Myth: you must drink it within 30 minutes. A widely cited 2013 meta-analysis found that once total daily protein was taken into account, the benefit of eating protein straight after training largely disappeared. A protein-rich meal or snack within a couple of hours either side of a session is a sensible habit, but there is no need to sprint to the changing room.
• Myth: your body can only use 30 g at once. A 2023 study found that a 100 g dose after exercise produced a larger and longer-lasting muscle-building response than 25 g. Protein above 30 g is not simply wasted. Spreading it across meals is still a practical way to hit your target, though.
• Myth: you need a shake before bed. Some research has looked at slow-digesting protein before sleep, and it is a reasonable option if it suits you. For a beginner it is a fine detail, not a priority.
• Myth: shakes will make you bulky. Muscle is built by training plus enough overall food. A shake is just protein. It will not add size on its own.

How do shakes fit a hybrid week of running and lifting?

If your week mixes running, strength and HIIT, your protein and carbohydrate needs both go up. A shake can help on your busiest days. After a strength session, a scoop with a meal soon after is plenty. After a long run, blend a scoop with milk and a banana so you get carbohydrate to refuel as well as protein to recover. On rest days, food usually covers it, so you can often skip the shake altogether.

A good rule for beginners: build each meal around a protein food first, then use a shake only on days you are short.

What are the most common beginner mistakes?

• Using shakes as meal replacements. Most protein powders are not designed to replace a meal. They lack the fibre, carbohydrate and micronutrients of real food.
• Buying the biggest tub first. Try a small bag or single servings until you find a flavour and texture you like.
• Expecting the shake to do the work. Consistent training and sleep matter far more than any powder.
• Ignoring a health condition. If you have kidney problems or another health condition, speak to your GP or a registered dietitian before increasing your protein intake.

How can Edge help you train and fuel well?

Nutrition works best when it matches the training in front of you. Edge is a free fitness app, and Edge Pro builds a fully personalised plan across running, strength, HIIT and mobility, ready in 15 minutes, with a real coach you can message anytime. Edge Pro is from £19.99 a month with a free 7-day trial. Edge syncs with Strava, Garmin, Apple Health and Coros, and has 20,000+ members. Edge Rewards, launching in November 2026, will also let members earn points from logged workouts and spend them on partner-gifted rewards in categories such as protein, snacks and coffee.

This article is general guidance, not medical advice. If you are new to exercise, returning from injury, pregnant, or managing a health condition, speak to your GP before starting, and see a physio for any niggle that does not settle.