Men's 3-in-1 Pre+ Post+ Probiotic

Remember the old adage "more isn't always better"? Many vitamins today use cheap chemicals that our bodies can't absorb in amounts that are much higher than we actually need! In the long term, taking these sorts of vitamins can be harmful to health because our bodies have a tough time getting rid of the excess.

Take plants as an example. Overwatering your plants can damage their roots, wilt the leaves, and ruin their growth. That's why First Day focuses on being a nourishing vitamin filling in the gaps, not overloading you with nutrients.

So, we've consciously formulated our vitamin around what we most commonly lack. Then we made our gummy to fill the gaps in our everyday needs with the finest ingredients.

We set out by asking the unaddressed questions in the industry. What are supplements really doing for us? Why are they made the way they are?

We found the average multivitamin uses outdated science from 50 years ago.

To separate truth from fiction, our team of experts investigated thousands of clinical studies. That’s why we use the latest science and source the most absorbable ingredients from all around the world so your vitamins are actually working for you and your health.

Healthy habits are hard to start let alone maintain! We wanted to make it as simple as one-click to building healthy foundations. With your subscription, you get a discount on every order for being a loyal First Day family member! Plus, cancelling a subscription is easy.

For every order, we also have a satisfaction guarantee so you can rest assured knowing we'll always have your back!

Micronutrients, absorption rate, and more! We've combed through the scientific studies so that you don't have to. But if you want to peruse, check out these scientific studies for yourself:

• National Center for Chronic Disease Prevention and Health Promotion, et al. - Vital Signs: Fruit and Vegetable Intake Among Children — United States, 2003–2010
  
  
• Department of Molecular Biology, Pusan National University, et al. - Folic acid is necessary for proliferation and differentiation of C2C12 myoblasts
  
  
• Austin J Cerebrovasc Dis Stroke - Sulforaphane Protects against Brain Diseases: Roles of Cytoprotective Enzymes
  
  
• Department of Pathology, University of Otago, et al. -Vitamin C and Immune Function
  
  
• Institute of Human Nutrition Sciences, Warsaw University of Life Sciences - Fruit and Vegetable Intake and Mental Health in Adults: A Systematic Review
  
  
• Program in International and Community Nutrition, Nutrition Department, University of California - The challenge to reach nutritional adequacy for vitamin A: β-carotene bioavailability and conversion--evidence in humans
  
  
• Vitamin and Mineral Nutrition Laboratory, Beltsville Human Nutrition Research Center - The bioavailability to humans of ascorbic acid from oranges, orange juice and cooked broccoli is similar to that of synthetic ascorbic acid
  
  
• Institute of Biochemistry, Life Sciences Center, Vilnius University - Bioavailability of Different Vitamin D Oral Supplements in Laboratory Animal Model
  
  
• Institute of Human Nutrition Sciences, Warsaw University of Life Sciences - Tocopherols and Tocotrienols—Bioactive Dietary Compounds; What Is Certain, What Is Doubt?
  
  
• Division of Nephrology, RWTH Aachen University - Vitamin K: Double Bonds beyond Coagulation Insights into Differences between Vitamin K1 and K2 in Health and Disease
  
  
• National Institute of Health - Vitamin B1 (Thiamine)
  
  
• National Institute of Health - Riboflavin Fact Sheet for Health Professionals
  
  
• University of Medical Sciences, Isfahan, Iran, et al. - Pyridoxal 5 Phosphate (P5P): Highly Bioavailable Vitamin B6
  
  
• Institute of Nutrition and Food Sciences, University of Bonn - Folic acid and L-5-methyltetrahydrofolate: comparison of clinical pharmacokinetics and pharmacodynamics
  
  
• Cristiana Paul, MS and David M. Brady, ND, DC, CCN, DACBN - Comparative Bioavailability and Utilization of Particular Forms of B12 Supplements With Potential to Mitigate B12-related Genetic Polymorphisms
  
  
• National Institute of Health - Biotin Fact Sheet Comparative Bioavailability and Utilization of Particular Forms of B12 Supplements With Potential to Mitigate B12-related Genetic Polymorphismsfor Health Professionals
  
  
• Department of Physiology, School of Medicine, Dokuz Eylul University, et al. - Timeline (Bioavailability) of Magnesium Compounds in Hours: Which Magnesium Compound Works Best
  
  
• Human Nutrition Laboratory, Institute of Food, Nutrition and Health, Swiss Federal Institute of Technology - Zinc absorption by young adults from supplemental zinc citrate is comparable with that from zinc gluconate and higher than from zinc oxide