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SiS Protein Bar
$2.49–$39.99
In stock at checkout.thefeed.com
We do our best to prioritize recovery because that’s how we get the most from training. The new SiS Protein Bar from Science in Sport is designed to provide a quick, convenient way to get in the nutrition you need after exercise. It’s perfectly packable for taking it with you out the door and having something to…
See all 2,350 The Feed products·Visit checkout.thefeed.com
Price and stock from checkout.thefeed.com, refreshed daily. We may earn a commission if you buy.
SiS Protein Bar at a glance
| Brand | The Feed |
|---|---|
| Price | $2.49–$39.99 |
| Type | Bars |
| Options | 3 flavors, 2 sizes |
| Availability | In stock at checkout.thefeed.com |
| Returns | Contact The Feed within 30 days if food arrives unsuitable to eat for a replacement or… |
Price check
At $2.49, the SiS Protein Bar is one of The Feed's more affordable items, whose 2,347 listed products run $0.53 to $6,125.
Similar items from other brands we track run $49.99 to $69.97.
About this product
From The Feed's product listing:
We do our best to prioritize recovery because that’s how we get the most from training. The new SiS Protein Bar from Science in Sport is designed to provide a quick, convenient way to get in the nutrition you need after exercise. It’s perfectly packable for taking it with you out the door and having something to kickstart recovery. No powders, mixing, or hangry attitudes necessary. It contains a blend of carbohydrates, protein, and electrolytes (along with vitamins and minerals) to replenish your fuel stores, rebuild your muscles, and help you repair following a hard training day. Rapid replenishment of your glycogen stores and the provision of protein helps you to get the most from your training and reduce your recovery time between training sessions, making sure you’re ready to go for your next workout. SiS Protein Bars contain a high-quality blend of whey, casein, and soy protein(s
Frequently asked questions
How much is the SiS Protein Bar?
The Feed lists it at $2.49–$39.99 on checkout.thefeed.com. We refresh prices throughout the day, but always confirm the final price at checkout.
What is The Feed's return policy?
Contact The Feed within 30 days if food arrives unsuitable to eat for a replacement or credit. Opened food gets store credit only, gear is returnable only if damaged, and opened specialty supplements (over $40), ketones and CBD are final sale.
What options does the SiS Protein Bar come in?
Flavor: Milk Chocolate and Peanut (Best By: 10/31/2026), Cookies and Cream (Best By: 10/31/2026), Dark Chocolate Raspberry. Size: Single Serving, Box of 12.
Where can I buy the SiS Protein Bar?
The SiS Protein Bar is sold directly by The Feed on checkout.thefeed.com. The Shop now button on this page goes straight to the product there.
Is the SiS Protein Bar in stock?
Yes. The Feed lists it as in stock on checkout.thefeed.com as of our latest check. Stock and prices refresh throughout the day.
Is The Feed a legit store?
The Feed is one of the best places to try endurance fuel before committing, since you can buy single gels, chews, bars and drink mixes from dozens of brands in one order. Skip it if you only buy one product in bulk and can get it cheaper on subscription from the maker. Read the return rules first: opened food gets store credit, not cash, and some supplements are final sale once opened. Our full The Feed review covers shipping, returns and what to check before ordering.
Is the SiS Protein Bar expensive?
At $2.49 it is on the affordable end of The Feed's range ($0.53 to $6,125 across 2,347 products), and similar items from other brands run $49.99 to $69.97.
More from The Feed
Shop all The Feed →
Alternatives from other brands
$2.49–$39.99Shop now at The Feed →