Insynergy Labs: UK-made capsule supplements with a buy-three bonus
A British supplement brand selling around fifty UK-made capsule products, with free delivery on two bottles and a free Magnesium Glycinate when you buy three.
50% of our commission goes to .Change
Pick a charity and we'll give them 50% of our commission.
Insynergy Labs codes & deals today
5% off on Insynergy Labs Purchase
5% off on Insynergy Labs Purchase For new customers only. Can be used once per customer on full-priced items. Enter the code at checkout to redeem. The offer cannot be combined with other discounts. Only redeemable in the UK.
10% off sitewide with code
Save 10% with code INSYNERGY10. Valid on eligible collections for both one-time purchases and subscriptions. No minimum spend required. One use per customer and cannot be combined with other discounts. Valid until 31 October. 10% off eligible collections. Valid on one-time purchases and subscriptions. Limited to one recurring subscription payment. No minimum purchase required. One use per customer. Cannot be combined with other discounts. Valid until 31 October.
15% off for first-time customers
For first-time customers. The site doesn't print a code; the discount is mentioned in the FAQ.
Shopping at Insynergy Labs? See all current Insynergy Labs discount codes and deals, checked regularly.
Insynergy Labs is a British supplement brand that sells its own range of capsules direct from its website. It started in the UK in 2017, is run by Koutos Ltd, and has its products made in the UK in facilities it describes as GMP and ISO 9001 certified, with third-party testing on every batch.
The shop suits people who already know which supplement they're after and want a UK-made version with the ingredients listed in full. There are around fifty products, grouped into sports nutrition, men's health, women's health, brain and sleep, digestion, joints, immunity and hair, and heart and anti-ageing, and most single bottles cost between about £14 and £30. Prices are in pounds and the shop delivers across the UK, apart from the Channel Islands.
If you've never tried the brand, the returns policy is worth reading. You have 14 days from delivery to send back unopened, sealed bottles. There's also a 30-day guarantee that refunds one opened bottle per customer if it doesn't suit you, though you pay the return postage. Checkout takes cards, PayPal, Apple Pay, Google Pay and Klarna.
What's worth a look
Six everyday products from the Insynergy Labs range, with the single-bottle prices shown on 9 October 2026.
Magnesium Glycinate300mg magnesium per vegan capsule; free on buy-3.£18.99View at Insynergy Labs
ZMX ProZinc, magnesium and vitamin B6 capsules.£13.99View at Insynergy Labs
Turmeric CurcuminoidsTurmeric extract with black pepper extract.£22.99View at Insynergy Labs
GlycineSingle-ingredient glycine in plant capsules.£23.99View at Insynergy Labs
Olive Leaf ExtractOlive leaf extract, 40% oleuropein, in capsules.£18.99View at Insynergy Labs
HMB ProHMB with vitamin D3, from the sports range.£21.99View at Insynergy Labs
The cheapest way into the range is ZMX Pro, a zinc, magnesium and vitamin B6 capsule at £13.99. Magnesium Glycinate is worth knowing about even if you don't plan to buy it, because it's the bottle the shop gives away free when you buy any three supplements. The rest of the list are single-ingredient or short-ingredient formulas, from Glycine to Olive Leaf Extract.
As with any supplement, these aren't a replacement for a varied diet. If you take medication, are pregnant or have a health condition, check with a pharmacist or GP before you start something new.
Current offers
- Buy 3, get Magnesium Glycinate free: add any three supplements and a bottle of Magnesium Glycinate (normally £18.99) comes free.
- Free UK delivery on two or more bottles: it's applied automatically, with no code needed. A single bottle costs £3.99 to deliver.
- 15% off for first-time customers, according to the shop's FAQ.
How to save more
- Don't order one bottle at a time. Two bottles get free delivery, and three bring in the free Magnesium Glycinate, so a bigger order works out cheaper per bottle.
- Look for the first-order 15% before you check out for the first time.
- Read the refund policy before you place a multi-buy order. Refunds on part of the order are based on what you paid per bottle, and the 30-day guarantee covers one opened bottle per customer.
Products, prices and offers checked on the store's own website on 9 Oct 2026. Prices and stock can change.
Ad: affiliate links. If you buy through links in this article we may earn a commission, at no cost to you. Insynergy Labs didn't pay for this article or check it before we published it. How we make money.
The Thursday email
Every Thursday: the best codes from the brands you shop at. After you sign up, pick your brands and whether you want codes, hot deals, free delivery or student offers. No spam, unsubscribe in one click.
Keep reading
Glori: an organic, UK-made sleep supplement with a £9.99 trial pack
A small British brand with one product, Glori Deep Sleep, sold as a 7-day trial pack or 30- and 90-day bottles, with free delivery on bottles.
Voucher Magpie team
Premier Inn spotlight: half-term breaks, Christmas markets and meal deals
Where to go with Premier Inn this autumn and winter, from half-term breaks and Christmas markets to hub and ZIP rooms, plus the meal deals and family perks that cut the cost.
Voucher Magpie team
B&Q spotlight: Dulux price cuts, power tool deals and kitchen savings
B&Q has cut prices on Dulux paint and power tools, with kitchen savings of up to 40% on big spends. Here's what's worth a look and how to save on delivery.
Voucher Magpie team