diff --git a/app/controllers/foods_controller.rb b/app/controllers/foods_controller.rb
index c6e3cde..3c86e15 100644
--- a/app/controllers/foods_controller.rb
+++ b/app/controllers/foods_controller.rb
@@ -216,5 +216,15 @@ class FoodsController < ApplicationController
   def prepare_nutrients
     @quantities = @project.nutrient_quantities.includes(:formula)
     @foods, @filter_q = @project.foods.filter(session[:f_filters], @quantities)
+
+    @food_summary = Hash.new { |h,k| h[k] = Hash.new(BigDecimal(0)) }
+    @quantities.each do |q|
+      @food_summary[:mfu_unit][q] = @foods
+        .each_with_object(Hash.new(0)) { |(i, qv), h| h[qv[q].last] += 1 if qv[q] }
+        .max_by(&:last).try(&:first)
+
+      max_value = @foods.map { |i, qv| qv[q].try(&:first) || BigDecimal(0) }.max
+      @food_summary[:precision][q] = [4 - max_value.exponent, 0].max
+    end
   end
 end
diff --git a/app/views/foods/_nutrients.html.erb b/app/views/foods/_nutrients.html.erb
index de3e160..46a45f7 100644
--- a/app/views/foods/_nutrients.html.erb
+++ b/app/views/foods/_nutrients.html.erb
@@ -9,12 +9,13 @@
   <%= error_messages_for *formulas %>
 
   <table class="nutrients list odd-even">
+    <% total_width = 4 + @quantities.length %>
     <thead>
       <tr>
-        <% total_width = 4 + @quantities.length %>
-        <th style="width:<%= 3 * 100/total_width %>%"><%= l(:field_name) %></th>
+        <th rowspan="2" style="width:<%= 3 * 100/total_width %>%"><%= l(:field_name) %></th>
         <% @quantities.each do |q| %>
-          <th style="width:<%= 100/total_width %>%" class="closable ellipsible">
+          <th class="closable ellipsible"
+              style="width:<%= 100/total_width %>%; border-bottom:none;">
             <div style="float:right;position:relative;">
               <%= link_to '',
                 toggle_exposure_project_foods_path(@project, quantity_id: q.id),
@@ -23,8 +24,11 @@
             <%= q.name %>
           </th>
         <% end %>
-        <th style="width:<%= 100/total_width %>%"><%= l(:field_action) %></th>
+        <th rowspan="2" style="width:<%= 100/total_width %>%"><%= l(:field_action) %></th>
       </tr>
+      <% @quantities.each do |q| %>
+        <th><%= "[#{@food_summary[:mfu_unit][q].try(&:shortname) || '-'}]" %></th>
+      <% end %>
     </thead>
 
     <tbody>
@@ -37,7 +41,10 @@
             <span class="icon icon-bullet-closed"><%= food.name %></span>
           </td>
           <% @quantities.each do |q| %>
-            <td class="primary value ellipsible"><%= format_value(nutrients[q]) %></td>
+            <td class="primary value ellipsible">
+              <%= format_value(nutrients[q], @food_summary[:precision][q],
+                               @food_summary[:mfu_unit][q]) %>
+            </td>
           <% end %>
           <td class="action unwrappable"><%= action_links(food, :nutrients) %></td>
         </tr>
diff --git a/app/views/meals/_index.html.erb b/app/views/meals/_index.html.erb
index deaaea3..14f2fc8 100644
--- a/app/views/meals/_index.html.erb
+++ b/app/views/meals/_index.html.erb
@@ -39,8 +39,9 @@
         <tr class="header">
           <td class="quantityhead"><%= "[#{@amount_mfu_unit.shortname}]" %></td>
           <% @quantities.each do |q| %>
-            <% mfu_unit = @ingredient_summary[:mfu_unit][q] %>
-            <td class="quantityhead"><%= "[#{mfu_unit ? mfu_unit.shortname : '-'}]" %></td>
+            <td class="quantityhead">
+              <%= "[#{@ingredient_summary[:mfu_unit][q].try(&:shortname) || '-'}]" %>
+            </td>
           <% end %>
         </tr>