BCAA

Shop BCAA at Myprotein

BCAAs — branched chain amino acids — are leucine, isoleucine, and valine, three of the nine essential amino acids your body can't produce on its own. That means they have to come from food or supplementation, and BCAA supplements make it straightforward to hit your intake consistently. Whether you prefer powder you can mix into water or convenient capsules, the BCAA range covers the formats serious training demands.

Every BCAA supplement is developed by Myprotein's expert nutritionists, so you know exactly what you're getting. Clean formulas, clear labelling, and a range broad enough to fit into any training routine — that's what this category is built around.

Who BCAAs Are For

BCAAs are a go-to for anyone who trains regularly and wants an easy way to keep their amino acid intake topped up throughout the day. Weight trainers, endurance athletes, and anyone putting serious sessions in will find BCAA powder or capsules a practical addition to their stack. They're particularly popular with those who train fasted or go long stretches between meals.

Vegans and vegetarians often use BCAA supplements to complement plant-based diets, since leucine, isoleucine, and valine can be harder to source in optimal amounts from plant proteins alone. If you're already tracking your protein intake carefully, adding a dedicated BCAA supplement gives you a more targeted approach to your amino acid profile.

When to Use BCAA

Most people take BCAAs around their training window — before, during, or after a workout. Intra-workout is a particularly popular option, since BCAA powder mixed into a water bottle is easy to sip throughout a session without weighing you down. Capsules work well when convenience is the priority and you're not looking to mix anything up.

Outside of training, BCAAs are commonly taken between meals, especially on days when whole-food protein intake is lower than usual. Fasted morning training is another scenario where many athletes reach for BCAAs before heading to the gym. There's no single right answer — consistency in when you take them matters more than the exact window.

BCAA Benefits

Three Essential Amino Acids in One Formula

BCAAs deliver leucine, isoleucine, and valine together — the three branched chain amino acids classified as essential because the body can't synthesise them. Getting all three in a single supplement means no guesswork about which amino acids you're covering. Most BCAA supplements use a 2:1:1 ratio of leucine to isoleucine to valine, mirroring the ratio commonly found in whole-food protein sources.

Flexible Formats for Any Routine

BCAA supplements come in powder and capsule formats, so there's an option whatever your preference. Powder blends easily into water and is available in a wide range of flavours, making it something you'll actually look forward to drinking during a session. Capsules are the no-fuss choice — pre-dosed and portable, they fit into a kit bag without any measuring or mixing.

Part of a Protein-Rich Training Stack

BCAAs are essential amino acids that form part of protein, and protein contributes to the growth and maintenance of muscle mass.¹ Including a dedicated BCAA supplement means your amino acid intake stays consistent even when whole-food meals aren't an option. They work well alongside a whey or plant protein shake as part of a complete supplement routine.

Straightforward Ingredients, Clear Labelling

The BCAA range keeps things simple — you get the amino acids you're looking for without unnecessary fillers or complicated ingredient lists. Every product is clearly labelled with exact doses per serving, so you always know what you're consuming and can fit it precisely into your daily nutrition plan.

Popular Picks

Impact Whey Mass Gainer — Built for those who struggle to eat enough, Impact Whey Mass Gainer packs 388 calories, 30g of protein, and 50g of carbs into a single serving.

FAQs

What are BCAAs?

BCAAs are branched chain amino acids — specifically leucine, isoleucine, and valine. They're three of the nine essential amino acids, meaning the body can't produce them independently and they must come from food or supplementation. BCAA supplements provide all three in a concentrated form, most commonly as a powder or capsule, making them a practical option for athletes and regular gym-goers who want to keep their amino acid intake consistent.

What is the difference between BCAA powder and BCAA capsules?

BCAA powder is mixed with water and is ideal for drinking during or around training — it's available in a wide variety of flavours and dissolves easily. BCAA capsules deliver the same amino acids in a pre-measured, portable form with no mixing required. The amino acid content is effectively the same; the choice comes down to personal preference and how you fit supplementation into your day.

What is the standard BCAA ratio?

The most widely used BCAA ratio is 2:1:1 — two parts leucine to one part isoleucine to one part valine. This ratio reflects the natural proportions of these amino acids found in whole-food protein sources such as meat, dairy, and eggs. Many BCAA supplements are formulated to this ratio, and it's the benchmark most athletes and nutritionists reference when choosing a product.

How do I take BCAA supplements?

BCAA powder is typically mixed with 300–400ml of water and consumed before, during, or after training. Capsules are taken with water according to the serving size on the label. Both formats suit fasted training scenarios when you want amino acid intake without a full meal. Always follow the serving guidance on your chosen product — dosage varies between formulations.

Can I take BCAAs on rest days?

Yes — many athletes take BCAAs on rest days as well as training days, particularly if their overall protein intake from food is lower on those days. BCAAs are amino acids that form part of your total daily protein picture, and protein contributes to the maintenance of muscle mass.¹ Consistent intake across the week is straightforward with either powder or capsules, depending on your preference.

Are BCAAs suitable for vegans?

Many BCAA supplements are suitable for vegans, though it's worth checking the individual product label since some formulations use capsule shells derived from gelatin. Vegan-friendly BCAA options are clearly labelled. Plant-based athletes often use BCAA supplements to complement their diet, since leucine, isoleucine, and valine can be less abundant in plant protein sources compared to animal-based ones.

What's the difference between BCAAs and a full amino acid supplement?

BCAAs focus specifically on the three branched chain amino acids: leucine, isoleucine, and valine. Full-spectrum or essential amino acid (EAA) supplements include all nine essential amino acids, covering a broader range of the amino acids the body can't produce on its own. BCAAs are the more targeted option; EAAs are more comprehensive. Which you choose depends on what your existing diet and supplement stack already covers.

Who developed the BCAA products at Myprotein?

All BCAA supplements in the Myprotein range are developed by Myprotein's expert nutritionists. Each formula is built around clear, effective ingredient profiles with precise dosing — no unnecessary fillers, just the amino acids you're there for. The range is designed to work as a standalone supplement or alongside products like protein shakes and pre-workout formulas.

What does BCAA stand for?

BCAA stands for branched chain amino acids. The name refers to the chemical structure of leucine, isoleucine, and valine — all three have a branching side chain, which distinguishes them from other amino acids. They're among the most studied amino acids in sports nutrition and are widely used by athletes across strength, endurance, and team sport disciplines.

How do BCAAs fit into a wider supplement stack?

BCAAs sit naturally alongside protein supplements, creatine, and pre-workout formulas. They're commonly taken intra-workout when a full protein shake isn't practical, or between meals to keep amino acid intake ticking over. BCAAs are essential amino acids that form part of protein, and protein contributes to the growth and maintenance of muscle mass,¹ making them a logical complement to a protein-first supplement approach.

1. Protein contributes to the growth and maintenance of muscle mass.