Men’s preconception support
Fatherhood starts before day one.
Male fertility support for men preparing for fatherhood. CoQ10, NAC and L-carnitine in one formula. Three capsules daily.
After launch $179.95 $119.00 USD · 3 bottles · 90 days
Launch offer ends in November 15, 2026 · 11:59 p.m. PacificNovember 15, 2026 · 11:59 p.m. Pacific
90-day satisfaction guaranteeFirst 3-bottle order · Opened bottles covered · No return shipmentThree capsules daily · 30 days per bottle
It takes two to prepare
A shared future. A part for both of you.
When a couple begins preparing for a baby, the work shouldn’t fall to one person alone.
SIRE began with a simple question: what can the future father do? For us, the answer starts with showing up, asking questions and making room for a daily routine.
Meet the founders
3 bottles · 90-day supplyMeet SIRE I
One less thing to organize.
A daily supplement for men preparing for fatherhood, with a supply that fits the way you want to start.
A straightforward daily routine
Three capsules daily, following the directions and cautions on your label.
Your next bottle, already on hand
Three 30-day bottles make one 90-day supply. Start with a single bottle if that suits you better.
A supply that fits your routine
Choose a one-time order or explicitly opt into recurring deliveries.
$119.00 USD · Three bottles. Delivered once.
Start your 90 daysThe 90-day approach
Preparation takes time. Your routine can start today.
Three bottles. A defined planning window. One less thing to organize.
Begin with intention.
Make space for a daily routine alongside balanced meals, movement and rest.
Keep it consistent.
Keep the next bottle on hand. Follow the label and your healthcare professional’s advice.
Prepare together.
Keep talking with your partner. Get individual guidance when you need it.
A 90-day supply is a convenient planning window. It does not guarantee a change in sperm parameters or pregnancy outcomes. Supplements should not delay medical assessment.
An everyday moment, with intention.Make it part of your day
Small routine. Clear intention.
Preparation is made up of everyday choices. Keep your routine simple enough to return to.
Choose a daily moment.
Keep your bottle somewhere that fits your day and away from children. Follow the storage instructions on the label.
Follow your label.
Use the serving directions on your bottle. A supplement is a personal choice; get individual advice when you need it.
Keep preparing together.
A bottle is one part of a bigger conversation. Make time to talk, plan and support each other.
Follow the directions and cautions on your label. Ask your healthcare professional about suitability, medications and other supplements.
Inside SIRE I
Every ingredient. A closer look.
Explore the ingredients. Read the research. Understand the limits. Select one to take a closer look.
Explore the full formula & researchCoQ10
CoQ10
A coenzyme involved in cellular energy production. Researchers have investigated CoQ10 in men with reduced sperm motility.
Study details & context
Randomized human trial
A placebo-controlled trial enrolled 60 men with idiopathic asthenozoospermia and examined semen measures over six months.
N-acetylcysteine (NAC)
N-acetylcysteine (NAC)
NAC is studied in relation to oxidative stress and sperm quality. It is a derivative of the amino acid cysteine.
Study details & context
Before-and-after human study
Researchers followed 50 men with abnormal motility and morphology, comparing semen and oxidative-stress measures before and after three months of NAC.
L-carnitine tartrate
L-carnitine tartrate
Carnitine has been investigated in selected cases of male-factor infertility. Research formulations should be distinguished from a product’s exact ingredient form.
Study details & context
Randomized crossover trial
A double-blind crossover trial compared L-carnitine with placebo in selected men with infertility.
Ingredient studies do not establish the effects of SIRE I or guarantee fertility outcomes. SIRE I is not a fertility treatment.
Follow your bottle’s Supplement Facts, directions and cautions.Fatherhood starts before day one.
Sebastian & Matt · Co-foundersWhy we started SIRE
Preparation should be something we share.
When Sebastian and his wife were preparing for a baby, he saw how much thought and effort she was putting into it. He wanted a practical way to do his part, too.
That question became SIRE. Co-founded by Sebastian, a father, and Matt, a holistic nutritionist, it makes men’s preconception preparation a little more straightforward.
SIRE I
Your preparation. Your choice.
Start with a one-time supply. Or choose an optional subscription. The decision is yours.
Secure checkout with Shopify · Full guarantee & return terms
A little clarity
Good questions. Straight answers.
A thoughtful decision starts with clear information. Here’s what to know before you begin.
Ask us a questionIs this a subscription?
Only if you choose it. The 30-day and 90-day one-time options are delivered once and have no recurring charges. The optional three-bottle subscription is delivered and billed every three months. Current prices appear in the purchase selector. Review the subscription policy before ordering.
Why choose 90 days?
A three-bottle supply provides a convenient planning window and keeps the next bottle on hand. It does not guarantee changes in sperm parameters or pregnancy outcomes.
How do I take SIRE I?
The supplied product information specifies three capsules daily with a meal and water. Always follow the directions and cautions on your product label and advice from your healthcare professional.
What if we’re already trying?
Discuss nutrition and fertility concerns with a qualified healthcare professional. SIRE I is a dietary supplement, not a treatment or a reason to delay appropriate assessment.