Optimum Nutrition BCAA Boost

Optimum Nutrition BCAA Boost — 8g BCAAs, 1,200mg Electrolytes, Caffeine Free

BCAA Boost is built for during the session. 8g of branched-chain amino acids in the researched 2:1:1 ratio, 1,200mg of electrolytes for hydration, and 1g of L-citrulline for endurance support — with no caffeine and no added sugar. 30 serves. In stock at TopDog Nutrition.

8g BCAAs at 2:1:1 — What the Ratio Means

The three branched-chain amino acids are leucine, isoleucine and valine, and they aren't equally important.

Leucine is the one that matters most. It directly activates the mTOR pathway, the signal that switches on muscle protein synthesis. 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.

2:1:1 — twice as much leucine as the other two — is the ratio used in most of the research, and it reflects the natural BCAA proportions found in muscle tissue. At 8g total, BCAA Boost delivers 4g of leucine per serve, which is a substantial dose.

1,200mg of Electrolytes

Hydration is the most underrated performance variable in training. Even mild dehydration measurably reduces strength output and endurance, and sweat carries sodium, potassium and magnesium out with the water.

Water alone rehydrates but doesn't restore electrolyte balance — and it's that balance that muscle contraction and nerve signalling depend on. 1,200mg is a substantial dose, aimed at genuine sweat replacement rather than a token inclusion.

1g L-Citrulline

Citrulline converts to arginine, raising nitric oxide production and dilating blood vessels. Better blood flow during a session means better oxygen and nutrient delivery to working muscle, and better clearance of the metabolic waste that builds up as you fatigue.

At 1g this is endurance support rather than a pump dose — appropriate for a product designed to be sipped through a session rather than slammed before one. If pump is what you're after, Amped Pre-Workout runs 6g.

No Caffeine — and Why That's Deliberate

This is the feature, not an omission. Caffeine-free means BCAA Boost fits places a stimulant product can't:

• Alongside a pre-workout — you get aminos and hydration without doubling your caffeine.
• Evening sessions — no impact on sleep, and sleep is where the adaptation happens.
• Long sessions — sipped over an hour or two without stacking stimulant on top of stimulant.
• Multiple serves a day — no caffeine ceiling to work around.

BCAA Boost or Amino Energy?

Amino Energy is 5g of a broader amino blend plus 100mg of caffeine, built for versatility — light pre-workout, all-day energy drink replacement.

BCAA Boost is 8g of BCAAs specifically, with more electrolytes, citrulline and no caffeine. It's the intra-workout specialist.

Want energy and aminos in one drink: Amino Energy. Want maximum BCAAs and hydration during a session, or you're already getting caffeine elsewhere: BCAA Boost.

Directions

Mix one serve with cold water and sip during training. Also works pre-training or through the day for hydration and amino support.

Caffeine-free, so there's no limit on timing — evening sessions included.

Frequently Asked Questions

Do BCAAs work if I already eat enough protein?

Honestly, the benefit is modest if your daily protein intake is adequate — whey protein already contains around 5.5g of BCAAs per serve naturally. Where BCAA Boost genuinely earns its place is fasted training, long sessions, and as a way of getting fluid and electrolytes in during a workout when a protein shake would sit heavily.

Can I take it with a pre-workout?

Yes — that's a main use case. No caffeine means no doubling up. Take your pre-workout before, sip BCAA Boost during.

Is it a replacement for protein powder?

No. 8g of BCAAs is not 24g of complete protein. This supports a diet that already has enough protein; it doesn't provide it.

Can I drink it on rest days?

You can, and the electrolytes and hydration are useful. But if your protein intake is on track, the aminos aren't doing much on a rest day.

How many serves per tub?

30 serves.