The annual GHOST x Sour Strips collaboration is back for its third year, and Rainbow is making waves again! After successful launches in 2023 and 2024, the mouth-puckering Rainbow flavor returns on September 9th, 2025, hitting four GHOST products with strategic exclusivity across different retailers.
The GHOST x Sour Strips Rainbow collaboration is back for year three! Four products are now available — Clear Whey, BCAA, Legend V4, and Energy. Limited availability across select retailers. Get yours while supplies last!
This year’s lineup brings Rainbow to GHOST Clear Whey, GHOST BCAA, GHOST Legend V4, and GHOST Energy, marking the first time the Sour Strips collaboration extends into both Clear Whey and BCAA formulas.
The Rainbow Takeover: Four Products, Strategic Distribution
GHOST continues to master the art of the collaboration game, and this year’s Sour Strips partnership showcases their strategic approach to distribution. Each product has specific availability:
- GHOST Clear Whey x Sour Strips Rainbow – US/EU Direct-to-Consumer + GNC Exclusive
- GHOST BCAA x Sour Strips Rainbow – US/EU/AU Direct-to-Consumer + GNC + The Vitamin Shoppe
- GHOST Legend x Sour Strips Rainbow – US/EU/AU Direct-to-Consumer + GNC + The Vitamin Shoppe
- GHOST Energy x Sour Strips Rainbow – US/AU Direct-to-Consumer + GNC + The Vitamin Shoppe
The strategic exclusivity creates urgency while ensuring fans worldwide can get their hands on at least some of the Rainbow lineup. Before diving into each product, let’s check PricePlow for the best GHOST deals and watch our flavor review:
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The 2025 Rainbow Product Lineup
GHOST Clear Whey x Sour Strips Rainbow
The newest addition to the Sour Strips family, GHOST Clear Whey brings Rainbow to the innovative clear protein category. After the success of Clear Whey’s permanent launch earlier this year, adding Rainbow to the lineup makes perfect sense.
Clear Whey Nutrition:
- Calories: 100
- Protein: 25g (whey protein isolate)
- Total Fat: 0g
- Total Carbohydrate: 1g
- Total Sugars: 0g
The light, refreshing nature of Clear Whey pairs perfectly with the fruity-sour Rainbow profile. Unlike traditional milky protein shakes, Clear Whey dissolves clear in water, creating a juice-like experience that makes the Rainbow flavor shine without any dairy notes interfering.
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GHOST BCAA x Sour Strips Rainbow
GHOST BCAA V2 gets the Rainbow treatment for the first time, bringing the sour-sweet flavor to the brand’s fermented amino acid formula.
BCAA V2 Ingredients:
- 2:1:1 BCAA Blend (7000mg total)
- Leucine: 3500mg
- Isoleucine: 1750mg
- Valine: 1750mg
- AstraGin: 25mg
The vegan-friendly fermented BCAAs deliver muscle recovery support while Rainbow makes sipping between sets or throughout the day a treat rather than a chore. At just 5 calories per serving, it’s a guilt-free way to stay hydrated and support recovery.
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GHOST Legend V4 x Sour Strips Rainbow
The Rainbow flavor returns to GHOST Legend V4, the brand’s flagship pre-workout that received a major upgrade this year.
Legend V4 Key Ingredients:
- GHOST LEGEND
- L-Citrulline: 6000mg
- Beta-Alanine: 3200mg
- Betaine Anhydrous: 2500mg
- VasoDrive-AP: 254mg
- Senactiv: 100mg
- GHOST SMART ENERGY
- L-Tyrosine: 2000mg
- Taurine: 1000mg
- VitaCholine: 1000mg
- Natural Caffeine: 300mg
- Theobromine: 100mg
- NeuroFactor: 100mg
- AstraGin: 50mg
With 300mg of natural caffeine and comprehensive pump and focus ingredients, Legend V4 in Rainbow delivers both performance and flavor in your pre-workout ritual.
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GHOST Energy x Sour Strips Rainbow
The collaboration that started it all continues with GHOST Energy in Rainbow. The ready-to-drink format showcases the flavor in its most convenient form.
Energy Ingredients:
- Carnipure L-Carnitine L-Tartrate: 1000mg
- Taurine: 1000mg
- Natural Caffeine: 200mg
- Alpha-GPC: 150mg
- NeuroFactor: 100mg
- AstraGin: 25mg
At just 5 calories per can with 200mg of natural caffeine, GHOST Energy Rainbow provides clean energy with that signature sour-sweet kick perfect for conquering afternoon slumps or powering through workouts.
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Strategic Evolution of the Collaboration
The third year of the GHOST x Sour Strips partnership shows smart evolution. By expanding into Clear Whey and BCAA while maintaining presence in Legend and Energy, GHOST demonstrates their understanding of what fans want: favorite flavors across multiple product categories.
The addition of Clear Whey is particularly clever. The clear, juice-like format provides the perfect canvas for Rainbow’s fruity-sour profile, avoiding any clash with dairy notes that might muddy the flavor in traditional whey products. Meanwhile, BCAA offers an amino acid option for those who want the Rainbow experience during training without the caffeine from Legend or Energy.
What Does Rainbow Actually Taste Like?
Sour Strips themselves joke that “Rainbow isn’t a flavor, but who cares?”… and they’re right. Rather than a single fruit profile, Rainbow delivers a medley of fruity flavors that creates its own unique identity. Think of it as a sweet and sour symphony where no single fruit dominates, but the combination just works.
The flavor brings that distinctive sour gummy taste with enough pucker to make it interesting, balanced with fruity sweetness that keeps you coming back. It’s the kind of flavor that defies definition but delivers satisfaction — exactly what you’d expect from a candy collaboration.
Limited Edition Alert: Mark Your Calendars
These Sour Strips collaborations have historically sold out fast, and with the strategic retail exclusivity this year, availability will be even more limited. The September 9th, 2025 launch date approaches quickly, so here’s your game plan:
- Decide your priorities – With Clear Whey being GNC and DTC exclusive in the US, prioritize accordingly
- Set those reminders – These limited editions move fast
- Consider the bundle – If you’re a Rainbow fan, grabbing multiple products makes sense
The Sweet and Sour Bottom Line
At long last, GHOST Lifestyle has launched a Protein Bar! It has two skinnier protein bars inside (making for extra coating), providing 20g protein from 270 calories. And it tastes great.
GHOST continues to prove why they’re the collaboration kings of the supplement industry. The Sour Strips Rainbow partnership has evolved from a fun flavor experiment to an annual event that fans eagerly anticipate. This year’s expansion into Clear Whey and BCAA shows GHOST listening to their community: giving them more ways to enjoy their favorite flavors.
Whether you’re looking for a refreshing clear protein shake, amino acids for training, a fully-loaded pre-workout, or a convenient energy drink, Rainbow has you covered. The sour-sweet profile that defies definition but delivers satisfaction is ready to pucker up your supplement routine.
Available September 9th, 2025, at GHOST.com, GNC, and The Vitamin Shoppe (product availability varies by retailer).
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