SciVation Xtend BCAAs 90 Serves

SciVation XTEND® BCAAs 90 Serves — Best Value Per Serve

The bulk tub of the world's best-selling BCAA formula. 7g of branched-chain amino acids at the researched 2:1:1 ratio with added electrolytes, sugar-free and carb-free — at the lowest cost per serve in the range. 90 serves. In stock at TopDog Nutrition.

7g of BCAAs at the 2:1:1 Ratio

The three branched-chain amino acids aren't equally important, and the ratio reflects that.

• Leucine is the one that matters most. It directly activates the mTOR pathway — the signal that switches muscle protein synthesis on. Without enough leucine, the other two have nothing to trigger.
• Isoleucine supports glucose uptake into muscle cells and contributes to energy production during training.
• Valine supports energy metabolism and may help reduce the central fatigue signalling that makes long sessions feel harder than they should.

Twice as much leucine as the other two is the ratio used across the majority of BCAA research, and it mirrors the natural proportions found in muscle tissue. At 7g total, XTEND delivers 3.5g of leucine per serve.

Electrolytes — The Part Most BCAA Products Skip

Hydration is the most underrated performance variable in training, and it's the reason XTEND positions itself as a recovery product rather than a straight amino powder.

Even mild dehydration measurably reduces strength output and endurance. Sweat carries sodium, potassium and other electrolytes out along with the water, and drinking plain water replaces the fluid without restoring the balance that muscle contraction and nerve signalling depend on.

Building electrolytes into the drink you're already sipping through a session means one bottle instead of two.

Sugar-Free, Carb-Free

Zero sugar and zero carbohydrate per serve. That matters for two groups in particular: anyone tracking macros closely, where an intra-workout drink shouldn't be eating into a carb budget, and anyone training fasted, where you want amino support without breaking the fast in any meaningful sense.

Where BCAAs Genuinely Help

Straight answer, because the category is oversold: if you're eating plenty of protein across the day, the marginal benefit of a BCAA supplement is modest. Whey protein already contains around 5.5g of naturally occurring BCAAs per serve.

Where XTEND earns its place:

• Fasted training — free-form aminos absorb without digestion, giving your body something to draw on when you've trained without eating.
• Long sessions — a protein shake sits heavily mid-workout. An amino drink doesn't.
• Cutting phases — restricted calories with lean tissue to preserve.
• Hydration with flavour — realistically, a big part of why people drink it. A flavoured zero-calorie drink gets consumed; plain water often doesn't.

Directions

Mix one scoop with 300–500ml of cold water and sip during training. Also works pre-training, post-training, or across the day to raise total fluid and amino intake.

Caffeine-free, so there's no timing restriction and no conflict with a pre-workout — take your pre-workout before, sip XTEND during.

Why the 90-Serve Tub

Three months at one serve a day, or six weeks at two. The cost per serve drops meaningfully against the 30-serve tub, which is what makes an intra-workout drink a daily habit rather than a considered purchase.

It's the right buy if you already know which flavour you want and you're training consistently. If you haven't tried XTEND before, start with the 30 — 90 serves of a flavour you don't enjoy is a long tub.

Keep it cool, dry and sealed. Moisture is what causes clumping in any amino powder, so don't leave the scoop buried with wet hands.

Frequently Asked Questions

Is the formula the same as the 30-serve?

Identical. Same 7g BCAA dose, same electrolytes. Only the tub size and price per serve change.

Does it replace protein powder?

No. BCAAs are three of the nine essential amino acids — building muscle protein requires all nine. This supplements adequate protein intake rather than providing it.

Can I take more than one serve a day?

Yes. It's caffeine-free with no stimulants, so there's no ceiling on timing or number of serves.

Will it break a fast?

Not in any meaningful sense — zero sugar, zero carbs. It's a common choice for fasted training.

How long will 90 serves last?

Three months at one serve a day. Check the best-before if you're only training a few times a week.