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Original price was: £176.80.Current price is: £166.40.Save 6%Tax includedLowest price in 30 days: £166.40

Purchase this product now and earn 166 Points!

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Orders placed before 4 pm are shipped on the same day

Free shipping: UK over £89, EU over £150
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Blackstone Labs SST-1 Kit is a dual-formula stack featuring two synergistic supplements: SST-1: GH and SST-1: IGF. This combination is formulated to potentially support goals related to training performance, recovery, and overall physical development. Each component is designed to complement the other as part of a structured supplement cycle.

Who Is It For?

This kit is intended for advanced adult users who are familiar with supplement cycles and are looking to explore complex stacks that may support their overall wellness, workout routine, or recovery practices.

What’s Inside the Kit?


SST-1: GH (Growth Hormone Support Complex)


Serving size: 3 tablets per day (45 servings per bottle)Key ingredients per serving:


  • Mucuna Pruriens Extract (std. to 500mg L-Dopa)


    This botanical extract contains L-Dopa, a precursor to dopamine, which may play a role in supporting neurotransmitter function and may be associated with natural hormone balance.


  • Anterior Pituitary Peptides (450mg)


    A blend of biologically active peptides that may mimic certain elements of pituitary output. These peptides are included to support the overall design of the GH-support matrix.


SST-1: IGF (Peptide & Nutrient Matrix)


Serving size: 4 tablets per day (45 servings per bottle)Key elements per serving:


  • NXP-GFâ„¢ (Whey Protein Isolate-derived Peptides)


    A proprietary whey protein extract standardized to contain approximately 22.25µg of naturally occurring IGF-1 per serving.


  • Phosphatidylcholine & HPBCD Complex


    This delivery system is designed to improve the transport and stability of the peptides. Liposomal encapsulation and cyclodextrin complexing may help protect ingredients through digestion and could potentially improve bioavailability.


How to Use




  • SST-1: GH – Take 3 tablets before bed on an empty stomach. This timing may align with your body’s natural rhythms for optimal effectiveness.


  • SST-1: IGF – Take 4 tablets in the morning or pre-workout, preferably on an empty stomach. This usage pattern may help support your training or recovery schedule.


Each component should be taken consistently for best results. A typical cycle duration is 6 to 8 weeks, though individual use may vary based on personal needs and supplement goals.
As always, users should evaluate their own health status and consult with a healthcare professional before starting any new supplement regimen.

Important Notes




  • Not intended for use by individuals under the age of 18.


  • Do not exceed the recommended daily dose.


  • Store in a cool, dry place.


  • Consult your doctor if you are taking medication or have any medical condition.


No product reviews yet — add the first one!

Need help?

We offer a variety of sports supplements, including muscle-building products, pre-workout formulas, post-exercise recovery items, vitamins and minerals, amino acids, and more.

All our supplements are sourced from reputable manufacturers and undergo rigorous quality control to ensure safety and efficacy. However, we recommend consulting a healthcare professional before starting any new supplement regimen.

Choosing the right supplement depends on your fitness goals, dietary needs, and any existing health conditions. Our product descriptions provide detailed information to help you make an informed decision. Contact our customer support team for personalised advice if you need more clarification.

Placing an order is simple. Please browse our products, add the items you’d like to your cart, and proceed to checkout. You can pay using credit or debit cards, Klarna, or LayBuy.

We offer both domestic and international shipping. Orders are typically processed within 1-2 business days; however, shipping times may vary by location. For detailed information, please refer to our Shipping Policy page.

Once your order is shipped, you will receive a confirmation email with a tracking number. You can use this number to track your order on the carrier’s website.

We offer a carrier ‘s-day return policy for unopened and unused products. If you are unsatisfied with your purchase, please contact our customer support team to initiate a return. For more details, please visit our Return Policy page.

Yes, we regularly offer discounts and promotions on various products. Sign up for our newsletter or follow us on social media to stay updated on the latest deals.

Absolutely! Our team of experts is here to help. Contact us via our website, and we will provide personalised recommendations tailored to your fitness goals and dietary needs.

We offer a selection of vegan—and vegetarian-friendly supplements. For specific information, please check the product descriptions or use the filter options on our website to find suitable products.

Please email our customer support team at info@crossthelimits.co.uk or speak directly to our AI bot assistant. We aim to respond to all inquiries within 24 hours.

We offer wholesale options for gyms, fitness centres, and retailers. For more information, please contact our wholesale department at wholesale@crossthelimits.co.uk.

Your order still needs to be completed” Our payment”gateway most likely did not accept your card. In such cases, the bank often holds the funds as “pending, ” which should be returned to your account within three business days.

If your card was not accepted when placing an order, please try using a different card or select an alternative payment gateway from the list on the payment page after placing your order.

We dispatch parcels to the EU every Friday. Your order must be placed by 10 AM on Friday to be included in that week’s shipment. If you order earlier in the week (e.g. on Sunday), your parcel will stay in the UK until Thursday, when it is transferred to our EU fulfilment centre. Once it arrives (usually within 5-7 days), we will send it via DPD, and you will receive your tracking details via email. Please note that the journey from the UK to the EU warehouse does not include tracking—tracking is only provided once your parcel is dispatched from the EU warehouse.

First, you’ll need to register for an account with our store to earn your points. Our points system lets you earn points on every purchase. For every £1 spent on our website, you earn 1 point. For every 100 points, you get £1 in store credit.

For example, if you order £100, you will earn 100 points (equivalent to £1), which you can redeem on your next order.

Yes! You can pay for your supplements using Bitcoin (BTC), Ethereum (ETH), USDT, and many other cryptocurrencies via our secure payment partner, NOWPayments.

To ensure reliable delivery and avoid customs issues, all UK orders are shipped via a consolidated weekly route to our EU hub.

This method guarantees:

  • No customs delays
  • No VAT or duty on delivery
  • One fixed shipping fee (£15)

Orders placed after Friday may be included in the following dispatch window.

Delivery time can be up to 2–2.5 weeks, depending on order timing.

All parcels are delivered via DPD with EU tracking provided after dispatch.

Original price was: £176.80.Current price is: £166.40.Save 6%Tax includedLowest price in 30 days: £166.40

Purchase this product now and earn 166 Points!

In stock

Orders placed before 4 pm are shipped on the same day

Free shipping: UK over £89, EU over £150
Secure Card Payments
visa master gpay apay
Pay later with Klarna - interest free
14-Day Returns

SST-1 Kit by Blackstone Labs


Blackstone Labs SST-1 Kit is a dual-formula stack featuring two synergistic supplements: SST-1: GH and SST-1: IGF. This combination is formulated to potentially support goals related to training performance, recovery, and overall physical development. Each component is designed to complement the other as part of a structured supplement cycle.

Check out our supplements for performance!

No product reviews yet — add the first one!

Need help?

We offer a variety of sports supplements, including muscle-building products, pre-workout formulas, post-exercise recovery items, vitamins and minerals, amino acids, and more.

All our supplements are sourced from reputable manufacturers and undergo rigorous quality control to ensure safety and efficacy. However, we recommend consulting a healthcare professional before starting any new supplement regimen.

Choosing the right supplement depends on your fitness goals, dietary needs, and any existing health conditions. Our product descriptions provide detailed information to help you make an informed decision. Contact our customer support team for personalised advice if you need more clarification.

Placing an order is simple. Please browse our products, add the items you’d like to your cart, and proceed to checkout. You can pay using credit or debit cards, Klarna, or LayBuy.

We offer both domestic and international shipping. Orders are typically processed within 1-2 business days; however, shipping times may vary by location. For detailed information, please refer to our Shipping Policy page.

Once your order is shipped, you will receive a confirmation email with a tracking number. You can use this number to track your order on the carrier’s website.

We offer a carrier ‘s-day return policy for unopened and unused products. If you are unsatisfied with your purchase, please contact our customer support team to initiate a return. For more details, please visit our Return Policy page.

Yes, we regularly offer discounts and promotions on various products. Sign up for our newsletter or follow us on social media to stay updated on the latest deals.

Absolutely! Our team of experts is here to help. Contact us via our website, and we will provide personalised recommendations tailored to your fitness goals and dietary needs.

We offer a selection of vegan—and vegetarian-friendly supplements. For specific information, please check the product descriptions or use the filter options on our website to find suitable products.

Please email our customer support team at info@crossthelimits.co.uk or speak directly to our AI bot assistant. We aim to respond to all inquiries within 24 hours.

We offer wholesale options for gyms, fitness centres, and retailers. For more information, please contact our wholesale department at wholesale@crossthelimits.co.uk.

Your order still needs to be completed” Our payment”gateway most likely did not accept your card. In such cases, the bank often holds the funds as “pending, ” which should be returned to your account within three business days.

If your card was not accepted when placing an order, please try using a different card or select an alternative payment gateway from the list on the payment page after placing your order.

We dispatch parcels to the EU every Friday. Your order must be placed by 10 AM on Friday to be included in that week’s shipment. If you order earlier in the week (e.g. on Sunday), your parcel will stay in the UK until Thursday, when it is transferred to our EU fulfilment centre. Once it arrives (usually within 5-7 days), we will send it via DPD, and you will receive your tracking details via email. Please note that the journey from the UK to the EU warehouse does not include tracking—tracking is only provided once your parcel is dispatched from the EU warehouse.

First, you’ll need to register for an account with our store to earn your points. Our points system lets you earn points on every purchase. For every £1 spent on our website, you earn 1 point. For every 100 points, you get £1 in store credit.

For example, if you order £100, you will earn 100 points (equivalent to £1), which you can redeem on your next order.

Yes! You can pay for your supplements using Bitcoin (BTC), Ethereum (ETH), USDT, and many other cryptocurrencies via our secure payment partner, NOWPayments.

To ensure reliable delivery and avoid customs issues, all UK orders are shipped via a consolidated weekly route to our EU hub.

This method guarantees:

  • No customs delays
  • No VAT or duty on delivery
  • One fixed shipping fee (£15)

Orders placed after Friday may be included in the following dispatch window.

Delivery time can be up to 2–2.5 weeks, depending on order timing.

All parcels are delivered via DPD with EU tracking provided after dispatch.