myLab Box offers the 30% off storewide code as its headline deal, which beats all other percentage discounts on your total basket and works on any purchase. This is your starting point for most shopping trips, though several codes are worth checking depending on your basket size and what you are buying.
Small baskets under $50: If you are buying a single test or kit with a lower price, start with the 30% off code. On a $30 test, for example, you save $9 and pay $21. The fixed $25 off code for the Uber Box product gives better value only if you are buying that specific kit and the discount still outweighs the percentage; on the Uber Box itself at typical pricing, 30% off may still win, so compare both at the point you see the price.
Midrange baskets $50 to $150: The 30% off storewide code remains the strongest option for flexibility. On a $100 order, you save $30 and pay $70. The fixed $25 off code for the Uber Box applies only to that product, so use it if that kit is your purchase and confirm the final price beats 30% off; otherwise stick with the percentage.
Larger baskets over $150: The 30% off code continues to pull ahead. On a $200 order, you save $60 and pay $140, which no other single code matches. Again, the $25 off code only works for the Uber Box product, so compare it to 30% off that item alone if it is part of your basket.
Buying a subscription: The 15% off subscription sale is a separate discount for myLab Box's subscription service only and does not require a code. If you are signing up for regular testing, this is your option.
Product specific deals: The 20% off all kits and 20% off selected kits codes apply to specific products only, not your whole order. Since 30% off storewide covers those same items with a bigger discount, use the 30% code instead unless a particular kit is excluded from the 30% offer, which you can check on the product page.
The other codes (10% and 15% off) are weaker than the 30% headline and should not be your choice. None of the codes can be combined, so pick the single code that saves you the most on your final total. Check the 30% off code first; only if you are buying the Uber Box specifically, or signing up for a subscription, should you compare a different offer at the actual prices shown.